Solid State Relays and Solid State Contactors

Transcription

1 and Contactors - General Description Series SR7-SH Panel Mount (to 40A) Technical Information Series SR7-A DIN-rail Mounted Contactors (to 50A) Technical Information Series SAS(R) Panel Mount (50 & 75A) and DIN-rail Mounted (to 100A) Relay Application Notes Technical Information Series SR7-SA and SR7-SC Plug-in Technical Information SR7 1

2 and Contactors Reliable performance for millions of operations Common Applications Heating controls Injection molding machines Material Handling Semiconductor manufacturing equipment Glass processing Welding controls Food processing SR7 Industrial & commercial ovens Soldering machines Medical equipment Office machinery Robotics Rubber and plastics 2 R Sprecher + Schuh s broad line of solid state relays are the complete solution for applications where high speed switching and long life are essential. In specific applications, solid state relays offer many advantages over mercury relays or electromechanical devices including no moving parts or contact arcing. In addition, solid state relays are directly compatible with logic components such as microprocessors, PLCs and temperature controllers. liminate dangerous mercury relays Solid state relays offer a safe alternative to the use of mercury relays in industrial applications. Because mercury is extremely toxic to humans and does not break down naturally, disposal of mercury relays poses significant environmental problems. Solid state relays are made up of electronic circuitry that contains no mercury. Long life expectancy Unlike electromechanical devices that have moving parts, solid state relays use photocouplers and phototriacs to switch loads. Their life expectancy is approximately 100,000 energized hours (over 11 years!). This dramatically reduces product replacement and downtime. Zero maintenance Since there are no moving parts, there is literally nothing to maintain. No contacts to wear out, no coils to burn out. They are immune to all but the most severe vibration (10G) and shock (100G). Maintenance, parts replacement and downtime are virtually eliminated. They also have very high I/O isolation that protects sensitive equipment. Increased signal reliability Many industrial applications today utilize digital logic such as microprocessors and Programmable Logic Controllers (PLCs) with 24V DC control schemes. This is hastening the move to solid state relays because of their switching speed, frequency, DC input and lower power consumption. They also generate very low electromagnetic interference, providing clean switching for virtually any load. Reduced costs Solid state relays typically require 25% less power than electromechanical or mercury relays, therefore they operate with less heat. This means the devices can be placed closer together, in a smaller enclosure, reducing costs. Broad selection for many applications Sprecher + Schuh solid state relays are available in single phase hockey puck models up to 75 amps and one, two and three pole, DIN-rail mounted models with integral heatsink up to 100 amps. We also offer solid state plug-in relays; a 14-pin mini-blade type and an 8-pin tube base type.

3 Panel Mount Hockey Puck relays for applications up to 40A (see page 18 for relays to 75A) Sprecher + Schuh s new SR7 series of solid state panel mount relays offer extremely long life and include many safety, convenience and protection features not found with other manufacturer s relays. Sized for most industrial applications SR7-SH panel mount relays are rated for loads from 5 to 40A with output voltage ranges up to 480V AC. Larger panel mount relays (up to 75A) can be found in this chapter on page 18. DC control voltages range from 5 to 24V DC, with two AC ranges available from 24 to 240V AC and 200 to 480V AC. reduces the likelihood of damage to the relay from rapid changes in voltage (dv/dt) and transient voltages. Opto-isolated input limits current leakage DIN-rail mount heatsinks available All Sprecher + Schuh panel mount relays come standard with a clear plastic safety cover All SR7-SH solid state relays feature either phototriac or photocoupler opto-isolated inputs, where an internal LD signals a photosensitive element when output switching is to occur. This provides up to 4,000V isolation between the input voltage and the output voltage and also limits current leakage. This feature is important in certain medical, residential and industrial applications. with DC input control voltage are also protected if the polarity is accidentally reversed during installation. Output circuit has many protection features All SR7-SH panel mount relays feature zero voltage turn-on, which means they are designed to turn on at the next zero crossover after application of the control voltage. This limits electromagnetic interference, reducing the chance of damage to downstream equipment. A built-in snubber circuit Part of the SR7-SH line includes optional heatsinks that allow the relay to be used to its full amp range. These optional heatsinks are sized specifically for the relay you select and are available in the Accessories section. Many safety and convenience features All Sprecher + Schuh solid state relays come standard with an LD to indicate when the relay is in an operational state. This increases safety and speeds troubleshooting. In addition, all panel mount relays come standard with a transparent cover that provides touch protection. SR7-SH 3

4 Panel Mount Series SR7-SH Series SR7-SH Panel Mount Rated Output (load) SSR Input to Output Maximum Current & Rated Input Isolation Method Voltage Range ➊ Control Voltage Catalog Number Price Phototriac 5 24V DC SR7-SH05GZ25 22 Photocoupler V AC V AC SR7-SH05GA V AC SR7-SH05GA22 28 Phototriac 5 24V DC SR7-SH10GZ V AC V AC SR7-SH10GA12 26 Photocoupler V AC SR7-SH10GA V AC 5 24V DC SR7-SH10HZ25 54 Phototriac 5 24V DC SR7-SH25GZ25 26 All models feature zero cross function, LD Indication and clear plastic safety cover Photocoupler V AC V AC SR7-SH25GA V AC SR7-SH25GA22 32 Photocoupler V AC 5 24V DC SR7-SH25HZ25 54 Phototriac 5 24V DC SR7-SH40GZ V AC V AC SR7-SH40GA12 59 Photocoupler V AC SR7-SH40GA V AC 5 24V DC SR7-SH40HZ25 73 Heat Sink / Derating Curves SR7-SH Maximum Load Current ( C) Maximum Load Current ( C) For 5A Devices ➋ With SR7-S10 Heatsink Without Heatsink Ambient Temperature ( C) For 25A Devices ➋ With SR7-S30 Heatsink With SR7-S20 Heatsink With Iron Plate (100 x 100 x 0.8mm) ➌ 8 12 With Iron Plate (100 x 100 x 0.8mm) ➌ 4 Without Heatsink Without Heatsink Ambient Temperature ( C) Maximum Load Current ( C) Maximum Load Current ( C) For 10A Devices ➋ With SR7-S10 Heatsink With Iron Plate (100 x 100 x 0.8mm) ➌ 6 4 Without Heatsink Ambient Temperature ( C) For 40A Devices ➋ With SR7-S30 Heatsink Ambient Temperature ( C) Ordering Instructions Specify catalog number (note output amperage of relay) Reference derating information from the appropriate table on opposite page to determine heatsink requirements If required, order heatsink from Accessories table on page 5 ➊ Maximum load current when mounted on a heatsink. ➋ All graphs assume conductive grease is being used. Refer to page 5 for details of using conductive grease. ➌ Minimum size iron plate required to achieve current rating shown here. 4

5 Panel Mount Series SR7-SH Series SR7-SH Panel Mount Relay Accessories Accessory Description Catalog Number Price Heatsink Panel or DIN-rail mount For 5 and 10A devices SR7-S10 17 Heatsink Panel or DIN-rail mount For 25A devices SR7-S20 22 Heatsink Panel or DIN-rail mount For 25A and 40A devices SR7-S30 28 DIN-rail - 2 meter lengths ( 6' 6") Top Hat, low profile (package of 12, price per rail) 3F 17 Top Hat, high profile (package of 20, price per rail) 3AF 26 SR7-SH Mounting Considerations The proper mouting orientation of the heat sink is so the heat fins run perpendicular to the floor (vertical) to maximize ventilation flow. If the fins do not run perpendicular to the floor, a 30% current derating is required. When attaching a heat sink to SR7-SH Panel Mount, apply heat conductive grease on the heat sink to maximize heat transfer between the SSR and the heat sink. Recommended types: Silicon based, Toshiba YG6240; Non-sililcon based, AOS company type SR7-SH 5

6 Technical Information Series SR7-SH Panel Mount Technical Information Control / Input Ratings Rated Control Operating Control Control Voltage Levels Catalog Number Voltage Voltage Range Impedance ➊ Pick-up Voltage Drop-out Voltage 5 24V DC 4 32V DC 15mA max. ➋ 4V DC max. 1V DC min. SR7-SH G V AC V AC 36kΩ ±20% 75V AC max. ➌ 20V AC min. ➌ V AC V AC 72kΩ ±20% 150V AC max. ➌ 40V AC min. ➌ SR7-SH H 5 24V DC 4 32V DC 5mA max. ➋ 4V DC max. 1V DC min. Load / Output Ratings Continuous Load Current (Resistive) Catalog Number Rated Load Load Voltage With Heat Sink ➍ Without Heat Sink ➍ Max. Inrush Voltage Range Min. Max. Min. Max. Current ➎ SR7-SH05G V AC V AC 0.1A 5A 0.1A 3A 60A (50/60Hz, 1 cycle) SR7-SH10G 0.1A 10A 0.1A 4A 150A (50/60Hz, 1 cycle) SR7-SH10H V AC V AC 0.2A 10A 0.2A 4A SR7-SH25G V AC V AC 0.1A 25A 0.1A 4A SR7-SH25H V AC V AC 0.2A 25A 0.2A 4A SR7-SH40G V AC V AC 0.1A 40A 0.1A 6A SR7-SH40H V AC V AC 0.2A 40A 0.2A 6A 220A (50/60Hz, 1 cycle) 440A (50/60Hz, 1 cycle) SR7- SR7- SR7- SH05G, SH10G, SH25G SH40G SH10H, SH25H, SH40H SR7-SH Standards UL 508, CSA C22.2, C, TÜV ➏ Load Switching Method / Device Triac Thyristor Pick-up Time 1/2 of load power source + 1ms max. (DC input) 3/2 of load power source + 1ms max. (AC input) Drop-out Time 1/2 of load power source + 1ms max. (DC input) 3/2 of load power source + 1ms max. (AC input) Output ON Voltage Drop [V] 1.6 (RMS) maximum 1.8 (RMS) maximum Output Leakage Current [ma] 5 max. (at 100V AC); 10 max. (at 200V AC); [ma] 10 max. (at 200V AC) 20 max. (at 400V AC) Output V DRM, V CO [V] Output di/dt [A/uS] 100 (SH10G, SH25G = 50) Output dv/dt [V/uS] 200 (SH10G, SH25G = 100) Output I 2 t [A 2 S] 24.5 (SH10G = 112.5; SH25G = 260) (SH40 = 1800) Output Tj [ C max.] 125 Insulation Resistance [MΩ] 100 min. (at 500VDC) Dielectric Strength [VAC] 2500, 50/60Hz for 1 minute Vibration Resistance (max.) [G] 10 (10 55Hz, 1.5mm double amplitude) Shock Resistance (max.) [G] 100 (1000 m/s 2 ) Ambient Temperature operating [ C] C (-22 F +176 F) with no icing or condensation storage [ C] C (-22 F +212 F) with no icing or condensation Ambient Humidity operating [%] 45 85% (no condensation) Tightening Torque SSR terminals screws [Nm] M4; ( lb-in.) M5; ( lb-in.) SSR to heat sink or panel [Nm] ( lb-in.) Heat sink to panel [Nm] M4; ( lb-in.) Weight [g] Approximately 60 Approximately 70 Approximately 80 Heatsinks [g] 200 (SR7-S10); 400 (SR7-S20); 560 (SR7-S30) ➊ Input impedance is measured at the maximum value of the rated supply voltage. ➋ With a constant current input system, SSR impedance varies with a change in input voltage. ➌ Refer to Temperature Characteristics graph on the opposite page for further details. ➍ When specified heat sink is used. Refer to derating charts on page 4 and Load Current Vs. Ambient Temperature Characteristics on the opposite page. See SR7 Accessories for applicable heat sinks. ➎ If SSR operation is continuous ON/OFF cycles, this value should be reduced by 50%. Refer to Inrush Current Resistivity graphs on the following page for more details. ➏ Catalog number SR7-SH _HZ25 not C or TÜV approved. 6

7 Technical Information Series SR7-SH Panel Mount Technical Information Inrush / Current Resistivity Inrush current (A. Peak) SR7-SH05G Inrush current (A. Peak) SR7-SH10G & SH10H NOT: Inrush current resistivity is the ability of an SSR to withstand a large surge current for a short period of time. Surges are considered non-repetitive (max. repeatability once every 2 5 seconds). Keep the inrush current to half the rated value if it occurs repetitively. xceeding the non-repetitive inrush current will damage the SSR. nergizing time (ms) nergizing time (ms) SR7-SH25G & SH25H SR7-SH40G & SH40H Inrush current (A. Peak) Inrush current (A. Peak) nergizing time (ms) nergizing time (ms) Temperature Characteristics (with Must Operate Voltage and Must Release Voltage) Variation Rate (%) SR7- G Heat Sink Size (cm 2 ) Heat Sink Size Vs. Load Current SR7-SH25G Ambient Temperature 80 C Ambient Temperature 40 C Aluminum plate 3.2mm thick NOT: The heat sink size refers to the combined area of the sides of the heat sink that radiate heat. For example, when a current of 18A is allowed to flow through the SSR at 40 C, the graph shows that the heat sink size is about 450 cm 2. Therefore, if the heat sink is square, the sides must measure 15 cm (15 2 x 2 = 450) or longer. SR7-SH Ambient Temperature ( C) Load Current (A) 7

8 Technical Information Series SR7-SH Panel Mount General Application Notes Load Connection For an AC load, use a power supply rated at 50 or 60Hz. The maximum rated frequency is 10Hz. The SR7-SH has a built-in varistor for surge/inrush protection of AC loads. If additional suppression is required, connect an external varistor across the load device terminals. Select a varistor which meets the load voltage condition outlined in the table below. Varistor Surge Load Voltage Varistor Voltage Resistance V AC V V AC V 1000 A minimum V AC V Zero Cross Function An SSR with a zero cross function operates when an AC load voltage reaches the zero point or its vicinity. This reduces clicking noises when the load is switched, and minimizes the influence of an inductive load, such as a lamp, heater or motor, on the power supply because the inrush current of the load is reduced. This can also minimize the scale of the inrush current protection circuit. Output (load voltage) At a low applied voltage, such as 24V AC, the load current is not fully supplied. When the unit is switched ON, the voltage required to power the unit deprives the output signal of the necessary voltage level and thus creates loss time. The lower the load voltage is, the greater the loss time. This condition, however, will not create any serious problems. Loss time For a DC inductive load, a diode should be connected parallel to the load to absorb the counter electromotive force (OFF) of the load. Input SSR Load Load power supply NOT: For additional details when using, refer to publication TCH-SSRAPP, Relay Application Guide available at or from your Sprecher + Schuh representative. SR7-SH Input ON OFF Terminal Arrangement / Internal Connections Load Load 1 2 ( ) (+) 4 3 Input 8

9 Dimensions Series SR7-SH Panel Mount SR7-SH05 SH25 Dimensions are in millimeters Dimensions not intended for manufacturing purposes 4.5 dia. Four, M4 x 8 screws Two, 4.3-dia. or M4 holes 58 max ± max. Operating indicator max. 27 max. SR7-SH dia. Two, M5 x 12 screws Two, 4.3-dia. or M4 holes 58 max ± max. Operating indicator Two, M4 x 8 screws max. 27 max. SR7-SH 9

10 Dimensions Series SR7-SH Panel Mount Dimensions are in millimeters Dimensions not intended for manufacturing purposes SR7-S10 Heatsink 4.6 dia. Two, M3 holes Two, M4 holes Two, 3.2-dia. holes 35± max max. 90± max max max. 90±0.4 Two, 4.4-dia. or M4 holes Dimensions are in millimeters Dimensions not intended for manufacturing purposes SR7-S20 Heatsink 4.6 dia. Two, M3 holes Two, M4 holes Two, 3.2-dia. holes 35± ± max max. Two, 4.4-dia. or M4 holes max. 90± max ± max. SR7-SH Dimensions are in millimeters Dimensions not intended for manufacturing purposes 4.6 dia Three, M4 holes SR7-S30 Heatsink Two, 3.2-dia. holes 35± max max. 90±0.4 Two, 4.4-dia. or M4 holes 56± max. 100 max. 90± max. 10

11 DIN-rail Mount Contactors UL resistive and inductive load ratings (to 50A) (see page 18 for integral heatsink devices to 100A) Sprecher + Schuh s new SR7-A series of solid state contactors offer the labor savings and convenience of DIN-rail mounting, while elminating the hassle of selecting and installing separate heatsinks. These contactors offer extremely long life and include many safety, convenience and protection features not found with other manufacturer s contactors. Sized for most industrial applications SR7-A DIN-rail mounted relays are available in single and dual phase models to 50A. Three phase units are available in 10 and 20A. All models offer three output voltage ranges up to 600V. Control voltages are available from 5 to 24V DC and from 24 to 230V AC. Opto-isolated input limits current leakage All SR7 solid state relays feature either phototriac or photocoupler optoisolated inputs, where an internal LD signals a photosensitive element when output switching is to occur. This provides up to 4,000V isolation between the input voltage and the output voltage and also limits current leakage. This feature is important in certain medical, residential and industrial applications. with DC input control voltage are also protected if the polarity is accidentally reversed during installation. magnetic interference, reducing the chance of damage to downstream equipment. A built-in snubber circuit reduces the likelihood of damage to the relay from rapid changes in voltage (dv/dt) and transient voltages. Integral heatsink with DIN-rail mounting SR7-A relays include a built-in heatsink. This eliminates the hassle of selecting and installing a properly sized heatsink, or mounting the relay directly on the backpan with silicone grease. Safety and convenience features All Sprecher + Schuh solid state relays come standard with an LD to indicate when the relay is in an operational state. This increases safety and speeds troubleshooting. Output circuit has many protection features SR7-A All SR7-A solid state relays feature zero voltage turn-on, which means they are designed to turn on at the next zero crossover after application of the control voltage. This limits electro- 11

12 Series SR7-A DIN-rail Mounted Contactors Series SR7-A DIN-rail Mounted Contactors - Single Phase Operational Operational Voltage SSR Current ➊ Control Catalog Number and Price AC1 AC-3 Voltage V AC Price V AC Price V AC Price V DC SR7-A15AB1 67 SR7-A15BB1 51 SR7-A15CB V AC/DC SR7-A15AA1 64 SR7-A15BA1 70 SR7-A15CA V DC SR7-A30AB1 74 SR7-A30BB1 59 SR7-A30CB V AC/DC SR7-A30AA1 68 SR7-A30BA1 78 SR7-A30CA1 63 All models feature zero cross function and LD Indication V DC SR7-A50AB1 99 SR7-A50BB1 82 SR7-A50CB V AC/DC SR7-A50AA1 93 SR7-A50BA1 103 SR7-A50CA1 85 Series SR7-A DIN-rail Mounted Contactors - Dual Phase Operational Operational Voltage SSR Current ➊ Control Catalog Number and Price AC-1 AC-3 Voltage V AC Price V AC Price V AC Price V DC SR7-A30AB2 144 SR7-A30BB2 116 SR7-A30CB V AC/DC SR7-A30AA2 130 SR7-A30BA2 153 SR7-A30CA V DC SR7-A50AB2 162 SR7-A50BB2 135 SR7-A50CB2 156 All models feature zero cross function and LD Indication V AC/DC SR7-A50AA2 150 SR7-A50BA2 170 SR7-A50CA2 147 Series SR7-A DIN-rail Mounted Contactors - Three Phase Operational Operational Voltage SSR Current ➊ Control Catalog Number and Price AC-1 AC-3 Voltage V AC Price V AC Price V AC Price V DC SR7-A10AB3 152 SR7-A10BB3 126 SR7-A10CB V AC/DC SR7-A10AA3 131 SR7-A10BA3 160 SR7-A10CA3 146 SR7-A All models feature zero cross function and LD Indication V DC SR7-A20AB3 170 SR7-A20BB3 145 SR7-A20CB V AC/DC SR7-A20AA3 150 SR7-A20BA3 175 SR7-A20CA3 164 ➊ See horsepower ratings on page

13 Series SR7-A DIN-rail Mounted Contactors Series SR7-A Accessories Accessory Description Catalog Number Price DIN-rail - 2 meter lengths ( 6' 6") Top Hat, low profile (price per rail) 3F 17 Top Hat, high profile (price per rail) 3AF 26 SR7-A 13

14 Technical Information Series SR7-A DIN-rail Mounted Contactors Technical Information Single and Dual-phase ➊ Three-phase 15A ➋ 30A 50A 10A 20A Output Specifications Operational Current AC-1, AC51 (heater load) maximum [A] AC-3, AC53A (motor load) maximum [A] 15 ➌ Horsepower Rating (per UL) 115V [HP] ~ ~ 1Ø 230V [HP] ~ ~ 400V [HP] ~ ~ 600V [HP] ~ ~ 115V [HP] Ø 230V [HP] V [HP] V [HP] Operational Voltage [V AC] /60 Hz [V AC] [V AC] Rated Insulation Voltage - U i [V] 660V AC Rated Impulse Withstand Voltage - U imp [kv] 4 Installation Category III Leakage Current maximum [ma] 1 Operational Current maximum [ma] 10 Semiconductor Protection Fusing Type 1 Coordination 50A gl / gg 35A gl / gg Type 2 Coordination I 2 t (t=10ms) 1800 A 2 s 1800 A 2 s ➋ 450A 2 s Control Circuit Specifications Control Voltage Range (±10%) [V] 5 24 DC / AC/DC Pickup Voltage maximum [V] 4.25 DC / 20.4 AC/DC Drop out Voltage minimum [V] 1.5 DC / 7.2 AC/DC Control Current / Power maximum 15mA at 24V DC / 1.5 VA/6mA at 24V DC Response Time 1/2 cycle / 1 cycle MC Immunity Meets requirements of N and N SR7-A Thermal Specifications Ambient Temperature +40 C [A] C [A] C [A] Power Dissipation Continuous duty 1.2 W/A (per phase) 3 W/A Intermittent duty 1.2 W/A duty cycle (per phase) 3 W/A duty cycle Ambient Temperature Range Operation [ C] Storage [ C] Cooling Method Natural convection Mounting Vertical (see general mounting instructions) nclosure Degree / Pollution Degree IP 20 / 3 Mechanical Housing Self-extinguishing (PPO UL94 V1) Heatsink Base Black anodized aluminum lectroplated steel Weights [lb.] ➊ Dual phase: current rating is accumulated, i.e., the sum of the current in L1 and L2. ➋ equals 450 A 2 s ➌ AC-3, AC-53 (motor 600VAC is rated at 10A max. 14

15 Technical Information Series SR7-A DIN-rail Mounted Contactors Technical Information Duty Cycle Rating Load factor = On-time / Duty cycle If the load factor is not 100%, the SR7-A can be selected for a higher current than the rated value according to the tables to the right. On-time On-time max. (heat up period) Duty Cycle 15A Single-phase Load Current On-time Load Factor (max.) (max.) 17.5A 15 minutes 85% 20A 13 minutes 75% 22.5A 11 minutes 67% 25A 9 minutes 60% 27.5A 7 minutes 55% 30A 5 minutes 50% Single-phase Load Current On-time Load Factor (max.) (max.) 17.5A 15 minutes 85% 20A 13 minutes 75% 30A Single-phase and Dual-phase Load Current On-time Load Factor (max.) (max.) 35A 15 minutes 85% 40A 13 minutes 75% 45A 11.5 minutes 67% 50A 10 minutes 60% 10A Three-phase Load Current On-time Load Factor (max.) (max.) 12.5A 15 minutes 85% 15A 13 minutes 75% 17.5A 11.5 minutes 67% 20A 10 minutes 60% Mounting Instructions The controller is designed for vertical mounting. If the controller is mounted horizontally, the load current must be reduced by 50%. The controller needs no side clearance. Clearance between two vertically mounted controllers must be minimum 80mm (3.15 ). Clearance between controller and top and bottom walls must be minimum 30mm (1.2 ) SR7-A 15

16 Technical Information Series SR7-A DIN-rail Mounted Contactors Wiring Diagrams Terminals 11 and 12 have no connection to the internal circuit. Single Phase Dual Phase Three Phase Applications Single Phase Single Phase P = I L x U L P = 1.73 x I L x U L Max. Heater Power (kw) 230V 400V 575V 15A A A Max. Heater Power (kw) 230V 400V 575V 15A A A Dual Phase Dual Phase Three Phase P = 1.73 x I L x U L Max. Heater Power (kw) 230V 400V 575V 30A A Three Phase P = 1.73 x I L x U L Max. Heater Power (kw) 230V 400V 575V 30A A SR7-A P = 1.73 x I L x U L P = 1.73 x I L x U L Max. Heater Power (kw) 230V 400V 575V 10A A Max. Heater Power (kw) 230V 400V 575V 10A A

17 Dimensions Series SR7-A DIN-rail Mounted Contactors SR7-A Contactor 15A Single Phase Dimensions are in millimeters Dimensions not intended for manufacturing purposes SR7-A Contactor 30A Single & Dual Phase, 10A Three Phase SR7-A Contactor 50A Single & Dual Phase, 20A Three Phase SR7-A 17

18 Series SAR(S) Reliable performance for millions of operations SAS(R) Common Applications Heating controls Injection molding machines Semiconductor manufacturing equipment Glass processing Welding controls Food processing Industrial & commercial ovens Soldering machines Medical equipment Office machinery Robotics Sprecher + Schuh s SAR(S) line of solid state relays are the ideal solution for applications where high speed switching and long life are essential. In specific applications, solid state relays offer many advantages over electromechanical devices including no moving parts or contact arcing. In addition, solid state relays are directly compatible with logic components such as microprocessors and PLCs. Broad selection for many applications SAS(R) solid state relays are available in 50 & 75A single phase hockey puck models and 75 & 100 amp DIN-rail mount units with integral heatsink. Three phase models up to 30 amps are also available. Opto-isolated input limits current leakage All Series SAS(R) solid state relays feature opto-isolated inputs where an internal LD signals a photosensitive element when output switching is to occur. This provides up to 4,000V isolation between the input voltage and the output voltage and also limits current leakage. This feature is important in certain medical, residential and industrial applications. DC relays are also protected if the polarity is accidentally reversed during installation. Output circuit has many protection features All Series SAS(R) solid state relays feature zero voltage turn-on, which means they are designed to turn on at the next zero crossover after application of the control voltage. This limits electromagnetic interference, reducing the chance of damage to downstream equipment. A built-in snubber circuit reduces the likelihood of damage to the relay from rapid changes in voltage (dv/dt) and transient voltages. In addition, all 330V output relays are designed with 600V blocking voltage and all 660V output relays are designed with 1200V blocking voltage, further protecting the relay. 18

19 Many safety and convenience features All Sprecher + Schuh solid state relays come standard with an LD to indicate when the relay is in an operational state. This increases safety and speeds troubleshooting. In addition, all hockey puck type relays come standard with a transparent cover that provides touch protection. Rail mounted relays also offer touch protection through the use of recessed terminals Integral heatsink with DIN-rail mounting A complete selection of relays is available with a built-in heatsink (SAR models). This eliminates the hassle of selecting and installing a properly sized heatsink, or mounting the relay directly on the backpan with silicone grease. Intelligent relays include special fusing SAS(R) relays come standard with a feature that shuts down the unit when it senses an overtemperature condition. A built-in replaceable semiconductor fuse further protects these larger relays from catastrophic failures due to short circuits. International standards and approvals Series SAS(R) are UL Recognized and CSA Approved. They also carry the C Mark, making them ideal for equipment that will be exported to the uropean conomic Community. Quick Selection Guide Surface Mount (hockey puck) SA S D See Type Mounting Output Voltage Amp Range Poles Control Voltage Page... S Surface mount (hockey puck) 3 330V maximum 50 1 D 4-32V DC S Surface mount (hockey puck) 3 330V maximum 50 1 ~ V AC ➊ S Surface mount (hockey puck) 6 660V maximum 50 1 D 4-32V DC S Surface mount (hockey puck) 6 660V maximum 50 1 ~ V AC ➊ DIN-rail Mount (with integral heatsink) SA R D ➊ See Type Mounting Output Voltage Amp Range Poles Control Voltage Page... R Rail mount (with integral heatsink) 6 660V maximum 25 1 D 4-32V DC MA 4-32V DC D 4-28V DC R Rail mount (with integral heatsink) 6 660V maximum 50 1 ~ V AC ➊ R Rail mount (with integral heatsink) 6 660V maximum 30 3 D 4-28V DC 26 R Rail mount (with integral heatsink) 6 660V maximum 30 3 ~ V AC ➊ 26 SAS(R) ➊ Omit D from catalog number if selecting AC control. xample: SAS(R)3-25-1D becomes SAS(R)

20 Series SAS Panel Mount 1 Pole Panel Mount Relay, 4-32V DC Control, 330VAC Max. Output RMS On-State Current Amps Derating Curve (50 & 75 amp) 75A 50A 75A free air 50A free air On heatsink (1.0) On heatsink (1.0) Relay base temperature (ºC) Safety Cover 50 Amp 75 Amp Catalog Number Price Catalog Number Price Specifications SAS3-50-1D 48 SAS3-75-1D 63 Input Voltage Range 4-32V DC 4-32V DC Current Draw 3.5 8mA 3.5 8mA Turn-on Voltage (min.) 4V DC 4V DC Turn-off Voltage (max.) 1V DC 1V DC Output Amp Rating (continuous with proper heatsink) Voltage Range V AC V AC Frequency Range Hz Hz Dimension (mm) 57(H) x 44.5(W) x 35(D) with safety cover 1 Pole Panel Mount Relay, V AC Control, 330VAC Max. Output RMS On-State Current Amps Derating Curve (50 & 75 amp) 75A 50A 75A free air 50A free air On heatsink (1.0) On heatsink (1.0) Relay base temperature (ºC) Safety Cover SAS(R) 50 Amp 75 Amp Catalog Number Price Catalog Number Price Specifications SAS SAS Input Voltage Range V AC V AC Current Draw 3.5 8mA 3.5 8mA Turn-on Voltage (min.) 100V AC 100V AC Turn-off Voltage (max.) 20V AC 20V AC Output Amp Rating (continuous with proper heatsink) Voltage Range V AC V AC Frequency Range Hz Hz Dimension (mm) 57(H) x 44.5(W) x 35(D) with safety cover 20

21 Series SAS Panel Mount 1 Pole Panel Mount Relay, 4-32V DC Control, 660VAC Max. Output Derating Curve (50 & 75 Amp) RMS On-State Current Amps A 50A 75A free air 50A free air On heatsink (1.0) On heatsink (1.0) Relay base temperature (ºC) Safety Cover 50 Amp 75 Amp Catalog Number Price Catalog Number Price Specifications SAS6-50-1D 53 SAS6-75-1D 76 Input Voltage Range 4-32V DC 4-32V DC Current Draw 3.5 8mA 3.5 8mA Turn-on Voltage (min.) 4V DC 4V DC Turn-off Voltage (max.) 1V DC 1V DC Output Amp Rating (continuous with proper heatsink) Voltage Range V AC V AC Frequency Range Hz Hz Dimension (mm) 57(H) x 44.5(W) x 23(D) no cover; 57(H) x 44.5(W) x 35(D) with cover 1 Pole Panel Mount Relay, V AC Control, 660VAC Max. Output Derating Curve (50 & 75 Amp) RMS On-State Current Amps A 50A 75A free air 50A free air On heatsink (1.0) On heatsink (1.0) Relay base temperature (ºC) Safety Cover 50 Amp 75 Amp Catalog Number Price Catalog Number Price Specifications SAS SAS Input Voltage Range V AC/DC V AC/DC Current Draw 2 19mA 2 19mA Turn-on Voltage (min.) 100V AC/DC 100V AC/DC Turn-off Voltage (max.) 20V AC/DC 20V AC/DC Output Amp Rating (continuous with proper heatsink) Voltage Range V AC V AC Frequency Range Hz Hz Dimension (mm) 57(H) x 44.5(W) x 23(D) no cover; 57(H) x 44.5(W) x 35(D) with cover SAS(R) 21

22 Series SAR 1 Pole DIN-Rail Mount Relay, 4-32V DC Control, 660VAC Max. Output RMS On-State Current Amps RMS On-State Current Amps A Derating Curve (25 Amp) Relay base temperature (ºC) Ambient temperature ( C), measured 1 (25mm) below relay when mounted on a vertical surface 40A Derating Curve (40 Amp) Relay base temperature (ºC) Ambient temperature ( C), measured 1 (25mm) below relay when mounted on a vertical surface 25 Amp 40 Amp Catalog Number Price Catalog Number Price Specifications SAR6-25-1D 67 SAR6-40-1D 81 Input Voltage Range 4-32V DC 4-32V DC Current Draw 3.5 8mA 3.5 8mA Turn-on Voltage (min.) 4V DC 4V DC Turn-off Voltage (max.) 1V DC 1V DC Output Amp Rating (continuous with proper air flow) Voltage Range V AC V AC Frequency Range Hz Hz Dimension (mm) 87(H) x 30(W) x 100(D) 87(H) x 60(W) x 100(D) 1 Pole DIN-Rail Mount Relay, V AC Control, 660VAC Max. Output SAS(R) RMS On-State Current Amps RMS On-State Current Amps A Derating Curve (25 Amp) Relay base temperature (ºC) Ambient temperature ( C), measured 1 (25mm) below relay when mounted on a vertical surface 40A Derating Curve (40 Amp) Relay base temperature (ºC) Ambient temperature ( C), measured 1 (25mm) below relay when mounted on a vertical surface 25 Amp 40 Amp Catalog Number Price Catalog Number Price Specifications SAR SAR Input Voltage Range V AC/DC V AC/DC Current Draw 9 25mA 9 25mA Turn-on Voltage (min.) 90V AC 90V AC Turn-off Voltage (max.) 20V AC 20V AC Output Amp Rating (continuous with proper air flow) Voltage Range V AC V AC Frequency Range Hz Hz Dimension (mm) 87(H) x 30(W) x 100(D) 87(H) x 60(W) x 100(D) 22

23 Series SAR 1 Pole DIN-Rail Mount Relay, 4-20mA AC Control, 660VAC Max. Output RMS On-State Current Amps RMS On-State Current Amps A Derating Curve (25 Amp) Relay base temperature (ºC) Ambient temperature ( C), measured 1 (25mm) below relay when mounted on a vertical surface 40A Derating Curve (40 Amp) Relay base temperature (ºC) Ambient temperature ( C), measured 1 (25mm) below relay when mounted on a vertical surface 25 Amp 40 Amp Catalog Number Price Catalog Number Price Specifications SAR6-25-MA 135 SAR6-40-MA 147 Input Control Current 4 20mA 4 20mA Voltage Drop 6V 20mA 6V 20mA Output Amp Rating (continuous with proper air flow) Voltage Range V AC V AC Frequency Range Hz Hz Dimension (mm) 87(H) x 30(W) x 100(D) 87(H) x 60(W) x 100(D) Application Notes: Accepts a 4-20mA process input and provides a high speed, time proportioning AC output. Permits a PLC, PC base control system, DCS, or other analog output system to easily supply a time proportioning output without any software programming. Output cycle time (ON time plus OFF time) = 0.5 sec. Output resolution is one half of one sinewave (8.3 msec for 60Hz applications). xample: 4 ma = 0% = OFF 12 ma = 50% = 250 msec ON, 250 msec OFF, 250 ms ON 16 ma = 75% = 375 msec ON, 125 msec OFF, 375 ms ON 20 ma = 100% = ON SAS(R) 23

24 Series SAR 1 Pole DIN-Rail Mount Relay, 4-28V DC Control, 660VAC Max. Output Derating Curve (50 Amp) Ambient temperature ( C), measured 1 (25mm) below relay when mounted on a vertical surface Derating Curve (75 Amp) Ambient temperature ( C), measured 1 (25mm) below relay when mounted on a vertical surface 50 Amp 75 Amp Catalog Number Price Catalog Number Price Specifications SAR6-50-1D 146 SAR6-75-1D 216 Input Voltage Range 4-28V DC 4-28V DC Current Draw 6 9mA 6 9mA Turn-on Voltage (min.) 4V DC 4V DC Turn-off Voltage (max.) 1V DC 1V DC Output Amp Rating (continuous with proper air flow) Voltage Range V AC V AC Frequency Range Hz Hz Dimension (mm) 126(H) x 60(W) x 128(D) 126(H) x 90(W) x 128(D) 1 Pole DIN-Rail Mount Relay, V AC Control, 660VAC Max. Output Derating Curve (50 Amp) Ambient temperature ( C), measured 1 (25mm) below relay when mounted on a vertical surface Derating Curve (75 Amp) SAS(R) Ambient temperature ( C), measured 1 (25mm) below relay when mounted on a vertical surface 50 Amp 75 Amp Catalog Number Price Catalog Number Price Specifications SAR SAR Input Voltage Range V AC V AC Current Draw 5 15mA 5 15mA Turn-on Voltage (min.) 90V AC 90V AC Turn-off Voltage (max.) 20V AC 20V AC Output Amp Rating (continuous with proper air flow) Voltage Range V AC V AC Frequency Range Hz Hz Dimension (mm) 126(H) x 60(W) x 128(D) 126(H) x 90(W) x 128(D) 24

25 Series SAR DIN-rail Mounted 1 Pole DIN-Rail Mount Relay, 4-28V DC Control, 660VAC Max. Output Derating Curve (100 Amp) Ambient temperature ( C), measured 1 (25mm) below relay when mounted on a vertical surface 100 Amp Catalog Number Price Specifications SAR D 382 Input Voltage Range 4-28V DC Current Draw 6 9mA Turn-on Voltage (min.) 4V DC Turn-off Voltage (max.) 1V DC Output Amp Rating (continuous with proper air flow) 100 Voltage Range V AC Frequency Range Hz Dimension (mm) 126(H) x 120(W) x 128(D) 1 Pole DIN-Rail Mount Relay, V AC Control, 660VAC Max. Output Derating Curve (100 Amp) Ambient temperature ( C), measured 1 (25mm) below relay when mounted on a vertical surface 100 Amp Catalog Number Price Specifications SAR Input Voltage Range V AC Current Draw 5 15mA Turn-on Voltage (min.) 90V AC Turn-off Voltage (max.) 20V AC Output Amp Rating (continuous with proper air flow) 100 Voltage Range V AC Frequency Range Hz Dimension (mm) 126(H) x 120(W) x 128(D) SAS(R) 25

26 Series SAR DIN-rail Mounted 3 Pole DIN-Rail Mount Relay, 4-28V DC Control, 660VAC Max. Output RMS On-State Current (Amps) Derating Curve (3 phase - 3 leg break) DIN-rail Panel Mount Relay base temperature (ºC) Ambient temperature ( C), measured 1 (25mm) below relay when mounted on a vertical surface Catalog Number 30 Amp Price Specifications SAR6-30-3D 172 Input Voltage Range 4-28V DC Current Draw 10 18mA Turn-on Voltage (min.) 3.5V DC Turn-off Voltage (max.) 1V DC Output Amp Rating (continuous with proper air flow) 30 Voltage Range V AC Frequency Range Hz Dimension (mm) 87(H) x 90(W) x 100(D) 3 Pole DIN-Rail Mount Relay, V AC Control, 660VAC Max. Output SAS(R) RMS On-State Current (Amps) Derating Curve (3 phase - 3 leg break) DIN-rail Panel Mount Relay base temperature (ºC) Ambient temperature ( C), measured 1 (25mm) below relay when mounted on a vertical surface 30 Amp Catalog Number Price Specifications SAR Input Voltage Range V AC Current Draw 10 33mA Turn-on Voltage (min.) 90V AC Turn-off Voltage (max.) 20V AC Output Amp Rating (continuous with proper air flow) 30 Voltage Range V AC Frequency Range Hz Dimension (mm) 87(H) x 90(W) x 100(D) 26

27 Series SAS(R) Replacement Parts Part Description Catalog Number Price Replacement Fuses - One fuse supplied standard with each fused relay. Fuse Size Fits Relay 63A SAR SAR6-50-1D 80A SAR SAR6-75-1D 100A SAR SAR D SA-SFU SA-SFU SA-SFU Replacement Cover - One cover supplied standard with each SAS panel mount relay. SA-SC1 3 Accessories Accessory Description Catalog Number Price DIN-rail - 2 meter lengths ( 6' 6") Top Hat, low profile (price per rail) 3F 17 Top Hat, high profile (price per rail) 3AF 26 SAS(R) 27

28 Application Notes Series SA Heatsink Considerations for Heat is generated by all in direct relation to the amount of current being switched. This heat must be dissipated as fast as generated otherwise the temperature of the relay will keep on increasing until it fails. 90% of the problems with relays are directly related to heat. Failure to provide adequate heatsinking will cause a solid state relay to fail. Units should not be mounted in an enclosed area without proper air flow. Units should also never be mounted to a plastic base or to a painted surface. Since airflow will affect its performance, a heatsink should be mounted in a manner that assures unrestricted airflow over its surface. Recommended mounting is on a vertical surface, with the fins oriented vertically so that air may flow unimpeded along the surfaces of the heatsink. Horizontal or inverted mounting is possible but not recommended, the SSR must be derated accordingly. Any panel mount Relay must be mounted to a clean, bare (non-painted) surface that is free of oxidation. Silicone (thermal) grease should be placed on the metal base of the relay, with no air pockets, before mounting to a metal surface. Heat transfer is affected by the thickness of the thermal compound, uniformity of application and how firmly the relay is attached to the heatsink. We suggest an evenly applied 0.002" thick layer of Dow Corning 340 or equivalent and torque of 10 inch-pounds on both of the SSR mounting screws. Note that a thicker layer of thermal compound actually decreases heat transmission. Remember that the heatsink removes the heat from the Solid State Relay and transfers that heat to the air in the electrical enclosure. In turn, this air must circulate and transfer its heat to the outside ambient. Providing vents and/or forced ventilation is a good way to accomplish this. All are capable of running at full rated power (with proper heatsink). However, it is strongly suggested that they be used at no more than 80% power to provide a safety margin in case of higher than expected voltage, temperature, dirt on the heatsink, etc. DIN-rail mounted single and three phase relays These devices are provided with an integral heatsink and should be mounted so as to provide 1" (25mm) of space between the units, for best air flow (the 80% of power rule still applies). They can be mounted against each other if the end units in a row are derated by 10% and the middle units are derated 10% more than the end ones. Since airflow will affect performance, relays with integral heatsinks should be mounted in a manner providing unrestricted airflow over their surfaces. Recommended mounting is on a vertical surface, with the fins oriented vertically, so that air may flow unimpeded along the surfaces of the heatsink. SAS(R) Mounting multiple solid state relays Care must be taken when mounting multiple SSR s in a confined area. SSR's should be mounted on individual heatsinks whenever possible. Panel mount SSR s should never be operated without proper heat sinking or in free air as they will THRMALLY SLF DSTRUCT UNDR LOAD. A simple rule-of-thumb for monitoring temperature is to slip a thermocouple under a mounting screw. If the base temperature does not exceed 45 C under normal operating conditions, the SSR is operating in an optimal thermal environment. If this temperature is exceeded, the relay s current handling ability must either be thermally improved by the use of a heatsink, or greater air flow must be provided over the device through the use of a fan. Some cases may require the selection of a higher current output SSR and thermally derating the device accordingly. 28

29 Application Notes Series SA 3 Phase Relay Applications The Sprecher + Schuh 3-phase solid state relay is designed for switching power to 3-phased asynchronous motors and to resistive loads. For guidance in its application, refer to the following notes: Motor Applications 380 Volt, 50/60 HZ Motors - Direct Start Motor Start Operating Size Current Current (KW) (ARMS) (ARMS) 2-Pole RPM Pole RPM Pole RPM Pole RPM Volt, 50/60 HZ Motors - Direct Start 2-Pole RPM Short Circuit Protection The relay can be short-circuit protected with an appropriate semiconductor fuse. The load integral of the relay (I 2 t) determines which size fuse is to be used. The relay load integral of the 3-phase relay is 1035A2 Sec. The fuse load integral must be below that of the relay for the appropriate protection. Be certain to analyze the fuse current/time curve to insure that the fuse can withstand the motor starting current (if applicable). NOT: Branch circuit protection should be provided by another slow-acting fuse or circuit breaker in series with the short circuit protection fuse. Load Protection To protect the load and relay from damage due to overload, an overload relay should be placed in series with the relay output. Additionally, it is advisable to have a mechanical disconnect in the load circuit for service purposes. Transient Voltage Protection When operating the relay in an electrically noisy environment, large voltage transients may damage the relay. To protect against this occurrence, it is advisable to install appropriate varistors across the respective supply and load terminals of the relay output. R S T MOV MOV MOV U V W Overload Capacities Control In the event that a load completely or partially short circuits, the following table indicates the absolute maximum current that the 3-phase SAR6 unit can withstand for various time limits: Time Current Time Current (Sec) (Arms) (Sec) (Arms) L1 L2 L3 N R S T U V W Star or Wye connection with neutral Control R S T U V W Control Star or Wye connection without neutral R S T U V W Delta connection Control L1 L2 L Volts Neutral SAS(R) R S T Control R S T Control U V W U V W Motor 29

30 Application Notes Series SA General Application Notes TTL Operation (Transistor-Transistor Logic) One of the primary advantages of SSR s is their compatibility with low-level, solid state logic. Any logic gate, buffered or not, capable of delivering the required current and voltage within its maximum power dissipation rating can be used to control an SSR or I/O module. Many TTL gates, for example will safely dissipate 40mW or more; and the total package will dissipate up to one watt. This gate power must not be confused with relay input power. Whereas an SSR whose input requires 6 ma at 5V DC consumes 30 mw of power, the TTL gate sinking this 6 ma may have a voltage drop of only 0.2 volt, and power consumption of just 1.2 mw! TTL gates can only sink relay input current, not source it. This is because as shown, the sourcing transistor has a pull-up resistance in its collector circuit. Pulling 11 ma through this resistance, in this case 130 Ohms, would leave insufficient input voltage to operate the relay. For example, a SSR requiring a nominal 5VDC may not operate on less than 4 volts. Typically, the drop across the transistor and diode at 11 ma would approximate 0.8 volt; and the drop across 130 Ohms is 1.4 volt. This 2.2 volt drop would leave only about 1.8 volts for the relay to operate, not enough for relay turn-on. 5 VDC 130 ohm V out Since TTL gates can only sink current to the relay, and since current sinking is done from a zero logic signal, the relay can only be turned on from a zero signal. This is contrary to normal relay operation, which prefers that the relay be turned on as a result of a one signal. To obtain relay actuation from a logical one signal, it is necessary to use an inverting gate. With such a gate, when a one signal is received, the sink transistor will turn on and conduct relay input current. Changing pick-up and drop-out voltage By using a zener diode in series with the input, the pick-up and drop-out voltage of a Relay or an I/O Module can be increased by the value of the zener. For example, a typical SSR has a maximum pick-up voltage of 4V DC and a minimum drop-out of 1V DC. By adding a 6 volt zener as shown, the new pick-up will be 10 volts and the new drop-out 7 volts. SPDT switching CR 1 Two SPST AC SSR s controlled from a single DC source, can be connected to operate as a SPDT relay to switch AC power to either of two loads. Note that one of the SSR s must be an AC input type. Because of overlap (make-before break), the power source must be capable of supporting both loads for approximately two cycles. Off state leakage in load No. 1 will be equal to the off-state leakage of relay No. 1 plus the input current for relay No.2. + VAC or VDC - SSR CMOS operation Load Load 1 2 AC input SSR CMOS gates can both source and sink current. As shown, a single gate may even be used to drive two. VAC SAS(R) Leakage - effect on current Many Temperature Controllers and PLC s use Triacs as output devices and most manufacturers place a snubber across their triacs for their own protection. This snubber can produce enough leakage when the controller is off that it can cause the Relay connected to it to go on or at least to not turn off properly. A solution to this problem is to place a 10,000 Ohm, 2 Watt resistor (for 120 Volt control), across the input (control) of the Relay. When sourcing transistor A is on, it conducts current to SSR2. When sinking transistor B is on, it conducts to SSR1. 30

31 Application Notes Series SA General Application Notes (continued) Calculating input current Many Sprecher+Schuh with DC input and AC output have a control circuit consisting of 1500 Ohms in series with the Opto-coupler LD. At 3 volt input, the relay will turn on with 1.33 ma (3 volts-1 volt dropped across the LD = 2 Volts / 1500 Ohms = 1.33 ma). Input voltage = Input Current (Amps) At higher voltages obviously, the current will be correspondingly higher. Since no more than 1.4 ma are required to turn on the relay and increasing the input voltage will unnecessarily increase this current, an external resistor can be added in series with the input, creating a voltage divider, so that the voltage seen at the input will be approximately 3 volts. V in Rx 3 Volt 1500 LD Rx = (V in -3).0014 If odd value, pick the next lower resistance value then calculate wattage required as: W = (V in -3) 2 Rx Under all conditions, the SSR will draw: (V in -1) Amps = Rx xample: For a 60V DC input, you will need an external resistor Rx = (60-3)/.0014 = 40,714 Ohms. Using the next lower standard value of 40K, the Wattage will be (60-3)2/40,000 =.08 Watts. Solid state relays in series If a higher voltage is required, two can be connected with their outputs in series and their inputs either in series or parallel, for example if two 25 Amp SSR s with 600 P.I.V. rating are connected in series they will have a rating of 25 Amps and a Peak Inverse Voltage capability of 1200V, quite suitable for 480VAC (680VPAK) operation. DC Load 480 VAC Latching SCR An AC SSR can be made to self latch (at the sacrifice of inputoutput isolation), thus permitting the use of momentary action switches for ON/OFF or START/STOP operation. It may be necessary to insert an RC filter across the relay input to prevent the relay from turning on due to switching transients upon application of system power. Note that the SSR employed here must be an AC input type. Off On Transformer loads 2.2k Ω - 5 Watt 1k 5 Watt Load Transformer loads can have severe inrush current problems depending on the state of the transformer flux at turn-off. The inrush current is created when the transformer saturates during the first half of the next applied voltage cycle. A relay must be selected to handle the surge current for 1/2 cycle. As a rule of thumb, the relay should have a 1/2 cycle surge current rating greater than the maximum applied line voltage divided by the transformer primary resistance. (Roughly 12 times the rated current) Recommended Transformer Loads: SSR at at Rating 120VAC 240VAC 10A 200VA 400VA 25A 400VA 800VA 40A 600VA 1.2KVA 75A 1KVA 2KVA Heater loads are well suited for driving heaters, however, in some temperature control applications the load is rapidly and almost continuously switched on and off, creating a severe thermal stress on the SCR chips. In those cases it is recommended to use the SSR at no more than 75% of rating. Recommended Heater Loads: SSR at at at Rating 120VAC 240VAC 480VAC 10A 960 W 1.9 kw 3.8 kw 25A 2.4 kw 4.8 kw 9.6 kw 50A 4.8 kw 9.6 kw 19.2 kw 75A 7.2 kw 14.4 kw 28.8 kw AC SAS(R) 31

32 Application Notes Series SA General Application Notes (continued) SAS(R) Solenoid values and contactors All of Sprecher + Schuh s Series SAS(R) SSR s use high noise immunity circuitry in addition to a snubber network to handle the electrical noise generated by inductive loads. However, the cycling of the solenoid load will generate large current spikes which will decrease the power capability of the SSR by the percentage shown. Cycle Time Power Rating 20 sec. 80% 5 sec. 65% 1 sec. 40% Recommended solenoid loads = V x I x (Power Rating) Recommended solenoid 5 sec. cycle time Lamp loads SSR at at Rating 120VAC 240VAC 10A 780W 1.9 kw 25A 2 kw 3.9 kw 50A 3.8 kw 7.6 kw 75A 5.8 kw 14 kw Since all of our SSR s are zero voltage switched, they are the ideal device for driving incandescent lamps. An electromechanical relay can turn on a lamp at any point of the AC cycle, causing a large inrush of current through the cold filament. A zero switched SSR will instead drive the lamp with a gradually increasing current, reducing the inrush current and prolonging lamp life. Recommended Lamp Loads: SSR at at Rating 120VAC 240VAC 10A 600W 1.2 kw 25A 1.5 kw 3 kw 50A 3 kw 6 kw 75A 4.5 kw 9 kw CAUTION: Using SSRs for driving mercury, fluorescent, or HID lamps should be avoided. If they must be used, the SSR must be severely derated and thoroughly tested in the specific application. Single phase motor control The following table gives guidelines for selecting relays for single phase non-reversing motors. Driving reversing motors is not recommended due to the potentially destructive voltage doubling and capacitive discharge that they create. Recommended Loads: SSR at at at Rating 120VAC 240VAC 480VAC 10A 1/4 HP 1/2 HP ~ 25A 1/3 HP 1 HP 2HP 50A 3/4 HP 2 HP 3HP 75A 1-1/4HP 3 HP 7.5HP Three phase motor control using one pole solid state relays Three phase motors can be controlled as shown. Note that only two SSR s are required, the third is optional. The inputs are shown in a parallel arrangement, but they can also be connected in series as long as at least 9VDC is available (3VDC/relay) for the control circuit. 3 Phase power - + Motor DC output relay - Thermal protection Most loads are inductive, even ones that are not so labeled. An inductive load will produce harmful transient voltages when it is turned off. Power MOSFT outputs can be susceptible to the transient voltages produced by seemingly non-inductive loads and can be damaged if not properly protected. A protection diode across the load is recommended. - Control source Input DC SSR Output - + Load

33 Application Notes Series SA General Application Notes (continued) Input and output polarity must be observed. Inductive loads must be diode suppressed. The diode used should be of the fast-recovery type with a reverse voltage rating at least equal to the supply voltage. xamples of fast-recovery diodes that may be used for transient suppression: Relay Motorola G Model Diodes Diodes SAS3-xx-1D MR851 A115A These diodes are suitable for most applications. For fast repetition rates consult factory for further information. Lamp test An AC output solid state relay can be quickly and easily tested. To evaluate whether or not it is operative, connect the relay as follows using the appropriate voltages. The lamp bulb should not turn On until the control voltage is applied (and Off when control voltage is removed). If the lamp comes On with no control voltage, the output is shorted. 9 Volt battery 40 Watt light bulb DC input SSR Plug into 120 VAC Shown is an AC output solid state relay. DC units can be checked the same way with appropriate DC voltages and load. Locking screws Screws are prevented from self-loosening by design. The automatic progressive locking principle generates an increasing thread friction as the screw is tightened. Repeated tightening and loosening does not cause fatigue of the locking components. Recommended torque is 7-9 in/lbs. Care should be taken not to overtighten screws. Saddle Clamps with Ring Terminals When using either Ring or Spade type terminals with the SAS3 or SAS6 lines, do not use the Saddle Clamps that are provided. It is sufficient to secure the Ring or Spade type connectors with the enclosed screws. Using SSR s with electromechanical relays Using electromechanical relays in conjunction with solid state relays is not recommended. lectromechanical relays produce a significant amount of electrical noise which could cause a solid state relay to mistrigger. If these two types of relays are used together, surge voltage protection is required. Fusing considerations Circuit Breakers and slow blow fuses offer no protection to Solid state relays. Fast, "Semiconductor Fuses" are the only reliable way to protect SSR's. All solid-state relays have an I 2 T rating. This rating is the bench mark for their ability to handle a shorted output condition. Sprecher+Schuh advocates circuit protection through the use of a properly selected I 2 T (semiconductor fuse). Devices such as electromechanical circuit breakers and slow blow fuses cannot react quickly enough to protect the SSR in a shorted condition and are not recommended!! Fast blow type fuses may be appropriate for some applications. For Fuses I 2 T is the measure of let-through energy in terms of current versus time. For solid state relays, I 2 T is based directly on the output thyristor's single-cycle peak surge current determined by: I 2 pk(surge) I 2 T = x (seconds) The procedure is to select a fuse with an I 2 T let-through rating that is less than the I 2 T capability of the solid state relay for the same duration. System designers who are considering using I 2 T fuses should consult a good technical manual dealing with the application of I 2 T's when designing their systems. g: Littlefuse's semiconductor fuse catalog. Caution Sprecher+Schuh can fail without warning (as is possible with any electronic component). For this reason Sprecher+Schuh cannot recommend, condone or warrant any application of our products that could cause harm or injury, in any manner, to any person upon such failure of the product. Please contact the factory if you have any doubts or questions as to whether this caution applies to your application. SAS(R) 33

34 Technical Information Series SAS(R) Technical Information Performance Data SAS3-50-1(D) SAS3-75-1(D) SAS6-50-1(D) SAS6-75-1(D) Input Output Voltage [V] V AC (4-32V DC) Turn-on Voltage (min.) [V] 90V AC (4V DC) Turn-off Voltage (max.) [V] 20V AC (1V DC) Reverse Voltage Protection [V] Not applicable (-75V DC) Impedance Rc [Ω] 40KΩ (1500Ω) Rated Amps (I OUT ) - continuous with proper heatsink [A RMS ] Voltage Drop (I OUT ) [VAC] Surge Current Withstand 1 cycle, non-repetitive [A PAK ] second, non-repetitive [A PAK ] Voltage Range (V OUT ) [VAC] Over voltage rating [PIV] Frequency Range [Hz] Leakage (V OUT ) Max. [ma] Turn On (Max.) 1/2 Hz 1/2 Hz 1/2 Hz 1/2 Hz Turn Off (Max.) 1/2 Hz 1/2 Hz 1/2 Hz 1/2 Hz Holding Current (Min.) [ma] 2 (3.5) 2 (3.5) 2 (3.5) 2 (3.5) Zero Voltage Switching Yes Yes Yes Yes Dv/Dt (V OUT ) Max. V/µs Commutating Dv/Dt Snubbed for Power Factor = I 2 T Fusing (8.3 ms) [A 2 S] Thermal Resistance (R ΘJC ) Tj=115 C [ C/W] General Characteristics Dielectric Strength (Input-Output-Base) [V RMS ] Capacitance Input to Output [pf] Ambient Temperature Range (Operating) [ C] 0 40 C (up to 80 C with derating) Mechanical Data Terminal Type Control Power 6-32 screw w/ saddleclamp 8-32 screw w/ saddleclamp SAS(R) 34

35 Technical Information Series SAS(R) Technical Information (continued) Performance Data SAR6-25-1(D) SAR6-40-1(D) SAR6-50-1(D) SAR6-75-1(D) SAR (D) SAR6-30-3(D) Input Output Voltage [V] V AC V AC V AC (4-32V DC) (4-28V DC) (4-28V DC) Current (Max.) [ma] 9 (15) 9 (15) 9 (15) 9 (15) 9 (15) 18 (33) Turn-on Voltage (min.) [V] 100 (4) 100 (4) 100 (4) 100 (4) 100 (4) 100 (3.5) Turn-off Voltage (max.) [V] 20 (1) 20 (1) 20 (1) 20 (1) 20 (1) 20 (1) Reverse Voltage Protection [V] N/A (-75) N/A (-75) N/A (-40) N/A (-40) N/A (-40) N/A (-75) Impedance Rc [KΩ] ~ ~ ~ 9 Rated Amps (I OUT ) - continuous with proper heatsink [A RMS ] Voltage Drop (I OUT ) [VAC] Surge Current Withstand 1 cycle, non-repetitive [A PAK ] second, non-repetitive [A PAK ] Voltage Range (V OUT ) [VAC] Over voltage rating [PIV] Frequency Range [Hz] Leakage (V OUT ) Max. [ma] Turn On (Max.) 1/2 Hz 1/2 Hz 1/2 Hz 1/2 Hz 1/2 Hz 1/2 Hz Turn Off (Max.) 1/2 Hz 1/2 Hz 1/2 Hz 1/2 Hz 1/2 Hz 1/2 Hz Holding Current (Min.) [ma] Zero Voltage Switching Yes Yes Yes Yes Yes Yes Dv/Dt (V OUT ) Max. V/µs Commutating Dv/Dt Snubbed for Power Factor = I 2 T Fusing (8.3 ms) [A 2 S] General Characteristics Dielectric Strength (Input-Output-Base) [V RMS ] Capacitance Input to Output [pf] Ambient Temperature Range (Operating) [ C] -0 to to to to to to +70 Mechanical Data Wire Size Control [AWG] [in-lbs] Power [AWG] [in-lbs] SAS(R) 35

36 Schematics Series SAS(R) Schematics SAS3-50-1D SAS3-75-1D SAS6-50-1D SAS6-75-1D SAR6-25-1D SAR6-40-1D SAS SAS SAS SAS SAR SAR SAR6-50-1(D) SAR6-75-1(D) SAR (D) SAS(R) SAR6-30-3(D) 36

37 Dimensions Series SAS(R) Dimensions are in decimal inches (millimeters) Dimensions not intended for manufacturing purposes SAS6(3) Panel Mount 1.75 (44.5) 1.10 (27.9) 8-32 Thread.19 (4.8).30 (7.6) (47.6) (43.2) 2.25 (57.1).172 (4.4) Dia. 2 places.53 (13.5) 1.00 (25.4) 6-32 Thread Case temp. reference point.90 (22.9) DIN-Rail Mount, 1 pole, 75 Amp Dimensions are in decimal inches (millimeters) Dimensions not intended for manufacturing purposes SAS(R) 37

38 Dimensions Series SAS(R) Dimensions are in decimal inches (millimeters) Dimensions not intended for manufacturing purposes DIN-Rail Mount, 1 Pole, 100 Amp Dimensions are in decimal inches (millimeters) Dimensions not intended for manufacturing purposes DIN-Rail Mount, 3 Pole, 30 Amp 2.95 (75.0) (8.0) W (T3) (L3) T 2.91 (74.0) V (T2) (L2) S 3.54 (90.0) U (T1) (L1) R 3.15 (80.0) 3.43 (87.0).14 (3.5) SAS(R) 3.86 (98.0) 3.94 (100.0) 38

39 Plug-in Style Tube base and miniature blade plug-in relays for applications to 5A Sprecher + Schuh s new SR7 series of solid state plug-in relays include both an 8-pin tube base style (SR7-SA) and a 14-blade miniature square base style (SR7-SC). Both relays fit into the existing sockets of general purpose electromechanical relays without retrofit or rewiring. These relays offer extremely long life and are excellent replacements for users experiencing high contact failure rates with traditional electromechanical devices. Sized for most industrial applications SR7-SA tube base relays are rated for loads up to 3 amps from 5 to 110V DC and up to 5 amps from 100 to 240V AC. DC control voltages range from 5 to 24V DC. SR7-SC mini-blade type relays are rated for loads up to 3 amps from 4 to 48V DC, and 3 amps from 100 to 240V AC. DC control voltages range from 5 to 24V DC, while two AC ranges are available from 110V AC through 220V AC. Output circuit has many protection features Many SR7 plug-in relays feature zero voltage turn-on, which means they are designed to turn on at the next zero crossover after application of the control voltage. This limits electromagnetic interference, reducing the chance of damage to downstream equipment. A built-in snubber circuit reduces the likelihood of damage to the relay from rapid changes in voltage (dv/dt) and transient voltages. Opto-isolated input limits current leakage Safety and convenience features New SR7 solid state plug-in relays mount directly into standard electromechanical relay sockets. No retrofit required. All SR7 solid state relays feature either phototriac or photocoupler optoisolated inputs, where an internal LD signals a photosensitive element when output switching is to occur. This provides isolation between the input voltage and the output voltage and also limits current leakage. This feature is important in certain medical, residential and industrial applications. with DC input control voltage are also protected if the polarity is accidentally reversed during installation. All Sprecher + Schuh solid state relays come standard with an LD to indicate when the relay is in an operational state. This increases safety and speeds troubleshooting. Use and disposal is also very safe, compared to mercury relays which are dangerous to the environment. SR7-SA 39

40 Plug-in Series SR7-SA Series SR7-SA Plug-in (tube base style) Rated Output (load) SSR Zero Cross Input to Output Maximum Current & Rated Input Function Isolation Method Voltage Range Control Voltage Catalog Number Price Yes Photocoupler V AC 5 24V DC SR7-SAZY5Z25 34 All models feature LD indication. No Photocoupler 5 110V DC 5 24V DC SR7-SANY3Z25 42 SR7-SA Accessories Accessory Description Catalog Number Price Screw Terminal, Tube Base Socket ➊ Panel or DIN-rail mounting, open style construction SR7-SKØ8PT 8 DIN-rail - 2 meter lengths ( 6' 6") Top Hat, low profile (package of 12, price per rail) 3F 17 Top Hat, high profile (package of 20, price per rail) 3AF 26 SR7-SA ➊ This product is sourced from a third party manufacturer. 40