Operating principle 0 Preventa safety modules types XPS BA,, XPS BF Operating principle Two-hand control stations are designed to provide protection against hand injury. They require machine operators to keep their hands clear of the dangerous movement zone. The use of two-hand control is an individual protective measure, which can safely protect only one operator. Separate two-hand control stations must be provided for each operator in a multiple-worker environment. Safety modules XPS BA, BC and BF for two-hand control stations comply with the requirements of European standard EN 574/ISO 85 for two-hand control systems. The control stations must be designed and installed such that they cannot be activated involuntarily or easily rendered inoperative. Depending on the application, the requirements of type C standards specifi c to the machinery involved must be met (additional personal protection methods may have to be considered). To initiate a dangerous movement, both operators (two-hand control pushbuttons) must be activated within an interval y 0.5 s (synchronous activation). If one of the two pushbuttons is released during a dangerous operation, the control sequence is cancelled. Resumption of the dangerous operation is possible only if both pushbuttons are returned to their initial position and reactivated within the required time interval. The safety distance between the control units and the hazardous zone must be suffi cient to ensure that when only one operator is released, the hazardous zone cannot be reached before the dangerous movement has been completed or stopped. Connections: page 8790-EN/6
Characteristics Preventa safety modules types XPS BA, Characteristics Module type XPS BA Product designed for max. use in safety related parts of control systems (conforming to EN 954-/ISO 849-) Category max. Category 4 max. Conformity to standards EN/IEC 6004-, EN/IEC 60947-5-, EN 574/ISO 85 type III A, EN 5008- Product certifications UL, CSA UL, CSA, INRS EN/IEC 6004-, EN/IEC 60947-5-, EN 574 type III C/ISO 85, EN 5008- Supply Voltage V z 4, a 5, a 0 c 4, a 4, a 5, a 0 Voltage limits - 0 + 0% (c 4 V), - 0 + 0% (a 4 V), - 5 + 5% (a 5 V), - 5 + 0% (a 0 V) - 0 + 0% (c 4 V), - 5 + 0% (a 4 V), - 5 + 5% (a 5 V), - 5 + 0% (a 0 V) Frequency Hz 50/60 Consumption VA < 0 (apparent power) < 6 Module inputs fuse protection Internal, electronic Inputs S: N/C + N/O, S: N/C + N/O Two-hand control type Conforming to EN 574/ISO 85 III A III C Synchronisation time s 0.5 maximum Control unit voltage c 4 V version V 4 4 a 4 V, 5 V, 0 V version V 4 48 Minimum voltage and current Between terminals T-T, T-T Between terminals T-T, T-T U min./i min. - c 4 V version (0 C) 8 V/0 ma 8 V/40 ma U min./i min. - a 4 V/5 V/0 V version (0 C) 8 V/0 ma 0 V/50 ma Calculation of wiring resistance RL (for only) Ω between terminals T-T, T-T as a function of the internal RL max. = supply voltage U int (terminals T-T) U int - U min. I min. Ue = true voltage applied to terminals A-A U int = supply voltage Ue - V (4 V version) (5 V, 0 V version) RL max. must not exceed 50 Ω U int between 0.5 V and 5 V, with typical value = 5 V Outputs Voltage reference Volt-free Number and type of safety circuits N/O (-4) N/O (-4, -4) Number and type of additional circuits N/C (-) N/C (-) Breaking capacity in AC-5 VA C00: inrush 800, maintained 80 Breaking capacity in DC- 4 V/.5 A - L/R = 50 ms Max. thermal current (Ithe) A 5.5 Output fuse protection, using fuses A 4 gg or 6 fast acting 4 gg conforming to EN/IEC 60947-5-, VDE 0660 part 00 Minimum current ma 0 Minimum voltage V 7 Electrical durability See page 860/ Response time ms < 5 < 0 Rated insulation voltage (Ui) V 00 (degree of pollution conforming to EN/IEC 60947-5-, DIN VDE 00 parts & ) Rated impulse withstand voltage (Uimp.) kv 4 (overvoltage category III, conforming to EN/IEC 60947-5-, DIN VDE 00 parts & ) LED display Operating temperature C - 0 + 55 Storage temperature C - 5 + 85 Degree of protection conforming to IEC/EN 6059 Terminals IP 0 Enclosure IP 40 Connections Type Captive screw clamp terminals -wire connection Without cable end Solid or fl exible cable: 0.4.5 mm With cable end Without bezel, fl exible cable: 0.5.5 mm With cable end With bezel, fl exible cable: 0.5.5 mm -wire connection Without cable end Solid or fl exible cable: 0.4 0.75 mm With cable end Without bezel, fl exible cable: 0.5 mm With cable end Double, with bezel, fl exible cable: 0.5.5 mm page 8790-EN/ Connections: page 8790-EN/6
Characteristics (continued) Preventa safety modules type XPS BF Characteristics Module type XPS BF XPS BFP Product designed for max. use in safety related parts of control systems (conforming to EN 954-/ISO 849-) Category 4 max. Conformity to standards EN/IEC 6004-, EN 574 type III C/ISO 85, EN/IEC 60947-, EN/IEC 60947-5-, DIN V VDE 080 (990), DIN V VDE 080 A (994) Product certifications UL, CSA, BIA Supply Voltage V c 4 Voltage limits - 0 + 0% Consumption W <.5 Module inputs fuse protection Internal, electronic Inputs S: N/C + N/O, S: N/C + N/O Two-hand control type III C conforming to EN 574/ISO 85 Synchronisation time s 0.5 maximum Control unit voltage V 4 V/8 ma Outputs Voltage reference Volt-free Number and type of safety circuits N/O (-4, -4) Number and type of additional circuits solid-state (type 4 V - 0 ma) Breaking capacity in AC-5 VA C00: inrush 800, maintained 80 Breaking capacity in DC- 4 V/.5 A - L/R = 50 ms Max. thermal current (Ithe) A 4. Max. total thermal current A 8.4 Output fuse protection, using fuses A 4 gg or 6 fast acting conforming to EN/IEC 60947-5-, VDE 0660 part 00 Minimum current ma 0 Minimum voltage V 7 Electrical durability See page 860/ Response time ms < 0 Rated insulation voltage (Ui) V 00 (degree of pollution conforming to EN/IEC 60947-5-, DIN VDE 00 parts & ) Rated impulse withstand voltage (Uimp.) kv 4 (overvoltage category III, conforming to EN/IEC 60947-5-, DIN VDE 00 parts & ) LED display Operating temperature C - 0 + 55 Storage temperature C - 5 + 85 Degree of protection conforming to IEC/EN 6059 Terminals IP 0 Enclosure IP 40 Connection Type Captive screw clamp terminals Captive screw clamp terminals, removable terminal block -wire connection Without cable end Solid or fl exible cable: 0.4.5 mm Solid or fl exible cable: 0..5 mm With cable end Without bezel, fl exible cable: 0.5.5 mm With cable end With bezel, fl exible cable: 0.5.5 mm With bezel, fl exible cable: 0.5.5 mm -wire connection Without cable end Solid or fl exible cable: 0.4 0.75 mm Solid cable: 0. mm, flexible cable: 0..5 mm With cable end Without bezel, fl exible cable: 0.5 mm With cable end Double, with bezel, fl exible cable: 0.5.5 mm page 8790-EN/ Connections: page 8790-EN/6 4
Selection, references Preventa safety modules types XPS BA,, XPS BF Selection Standard EN 574/ISO 85 defines the selection of two-hand controls according to the control system category. The following table details the three types of two-hand control conforming to EN 574/ ISO 85. For each type, it lists the operating characteristics and minimum requirements. Requirements of standard EN 574/ISO 85 Type I Type II Type III A B C Use of both hands (simultaneous action) Link between input and output signals Output signal inhibited Prevention of accidental operation Tamper-proof Output signal reinitialised Synchronous action (specifi ed time limit) Use of proven components (Category conforming to EN 954-/ ISO 849-) Redundancy with partial error detection (Category conforming to EN 954-/ ISO 849-) Redundancy + Self-monitoring (Category 4 conforming to EN 954-/ ISO 849-) Two-hand control station XY SBpp XPS BApp XPS BF XPS BF Meets the requirements of standard EN 574/ISO 85 Conforming to standard EN 954-/ISO 849-5605 References Description Safety modules for electrical monitoring of two-hand control stations Type conforming to standard EN 574/ ISO 85 III A Type of terminal block connection Integrated in module Number of safety circuits Additional outputs Supply Reference Weight N/O N/C a or c 4 V XPS BA50 0.00 kg a 5 V XPS BA40 0.00 XPS BApppp a 0 V XPS BA70 0.00 56054 III C Integrated in module N/O N/C c 4 V 0 0.400 a 4 V 0 0.400 pppp a 5 V 40 0.400 560075 a 0 V 70 0.400 N/O solid-state c 4 V XPS BF 0.50 Removable from module N/O solid-state c 4 V XPS BFP 0.50 XPS BFP page 8790-EN/ Connections: page 8790-EN/6 5
Connections Preventa safety modules type XPS BA XPS BA Module XPS BA associated with a two-hand control station Type III A conforming to EN 574/ISO 85 L (+) F S S A T T T T + Logic K T XPS BA A 4 N ( ) Signalling output Safety output S and S: pushbuttons. Must not be used for applications (presses) which require a type III C module (). Functional diagram of module XPS BA Supply voltage Two-hand control not activated Two-hand control activated Two-hand control not activated Supply A-A Input T-T (N/C) Input T-T (N/O) Safety output -4 (N/O) Signalling output - (N/C) Key 0 max. 500 ms max. 5 ms Response time LED details (XPS BA) Supply voltage A-A. K status (N/O safety output -4 closed). page 8790-EN/ 6
Connections (continued) Preventa safety modules type Module associated with a two-hand control station Type III C conforming to EN 574/ISO 85 L (+) F S ESC A T T T Y Y K K K T Logic K K K A T T T 4 4 N (-) S ESC: external start conditions. Y-Y: feedback loop. Output (-) must not be used as a safety circuit. It can be used for non-dangerous machine movements. Functional diagram of module Two-hand control Two-hand control activated not activated Two-hand control deactivated Mushroom head S (N/C) Mushroom head S (N/O) Mushroom head S (N/C) Mushroom head S (N/O) Feedback loop Output -4 (N/O) Output -4 (N/O) Output - (N/C) Key 0 max. 500 ms max. 0 ms Response time LED details () Supply voltage A-A, S-S. LED indicates that buttons S and S are correctly connected. Feedback loop Y-Y. K-K status (N/O safety outputs closed). page 8790-EN/ 7
Connections (continued) Preventa safety modules type Module associated with a two-hand control station and a foot switch L (+) S4 F 0 S S4 selector switch: 0 = stop = control station = foot switch S-S: two-hand control station pushbuttons S: foot switch S S A T T T T T T A Y Y 4 4 N (-) Modules associated with two-hand control stations L (+) F S S 7 X 9 When operator is absent: replace terminal block X by X and physically remove the two-hand control station. 4 5 6 A T T T T T T 8 0 When operator is absent: replace terminal block X by X and physically remove the two-hand control station. A Y Y 4 4 X 4 5 6 7 8 9 0 S S selector switch: = operator = operator = operator and operator S-S, S-S: two-hand control station pushbuttons S S 7 X 9 4 5 6 8 0 A T T T T T T A Y Y 4 4 N (-) page 8790-EN/ 8
Connections Preventa safety modules type XPS BF XPS BF Module XPS BF associated with a two-hand control station F S XY SB ESC A S S S Y Y Logic Fault K/K K K XPS BF K K A S S S Y4 Y44 4 4 S XY SB To PLC ESC: External start conditions. Y-Y: feedback loop Functional diagram of module XPS BF Two-hand control not activated Two-hand control activated Two-hand control deactivated Mushroom head S (N/C) Mushroom head S (N/O) Mushroom head S (N/C) Mushroom head S (N/O) Feedback loop Output -4 (N/O) Output -4 (N/O) Solid-state output Y4 (fault) Solid-state output Y44 (K/K) T = 0.5 s max. T = 0.0 s max. Activated Deactivated Key LED details (XPS BF) Supply voltage A-A (fuse status). Fault signalling. K-K status (N/O safety outputs closed). page 8790-EN/ 9