SLX Series Document No. 997-1000 Application Specific Controllers (SLX-ASC-FCU-L, SLX-ASC-HPU-L, SLX-ASC-RTU-L, SLX-ASC-UV-L) Free Programmable Controllers (SLX-PC-203, SLX-PC-300, SLX-PC-400, SLX-PC-500 ) 1. Product Description This document describes the hardware installation procedures for the SLX Series Application Specific Controller (ASC) and free Programmable Controller (PC). The ASC product line is designed to control and monitor HVAC equipment such as fan coil units, rooftop units, heat pump units and unit ventilators. This product line includes the following controllers: SLX-ASC-FCU-L, SLX-ASC-HPU-L, SLX-ASC- RTU-L and SLX-ASC-UV-L. The PC product line is designed to control and monitor various HVAC equipment such as rooftop units and air handling units, as well as chillers and boilers. Moreover, it is suitable for any lighting control and power measurement application. This product line includes the following controllers: SLX-PC- 203,SLX-PC-300, SLX-PC-400, SLX-PC-403 SLX-PC-410, SLX-PC-413, SLX-PC-500 and SLX-PC-510. These product lines are based on the LONWORKS technology for peer-to-peer communication between controllers and are LONMARK certified. All of these controllers are built on a similar platform, but have different numbers of inputs and outputs. Moreover, each individual model has different amounts of digital and/or universal outputs. For more information on the specific layout and functionality of each controller, please refer to their individual technical specification sheets. The following controllers are housed in small enclosures: SLX-ASC-FCU-L, SLX-ASC-HPU-L, SLX-ASC-RTU-L, SLX-ASC-UV-L, SLX-PC-203, and SLX-PC-300. The following controllers are housed in large enclosures: SLX-PC-400 models and SLX-PC- 500 models. Figure 1: (Top to Bottom) Large Enclosure with HOA Switches, Large Enclosure, and Small Enclosure. SLX Series Page 1 of 9
2. General Installation Requirements For proper installation and subsequent operation of each controller, pay special attention to the following recommendations: - It is recommended that the controller(s) be kept at room temperature for at least 24 hours before installation to allow any condensation that may have accumulated, due to low temperature during shipping/storage, to evaporate. - Upon unpacking the product, inspect the contents of the carton for shipping damages. Do not install damaged controllers. - Allow for proper clearance of controller enclosure, wiring terminals and service pin for easy access, hardware configuration and maintenance. Remember to record the Neuron ID located on both sides of the device (in text and barcode format) for later commissioning. - Each controller is designed to operate under the following environmental conditions: Ambient temperature from 32 F to 158 F (0 C to 70 C) Relative humidity from 0% to 90%, non-condensing - Ensure proper ventilation of each controller and avoid areas where corroding, deteriorating or explosive vapors, fumes or gases may be present. Each controller must be oriented with the ventilation slots and power supply/output terminal block connector towards the top to permit proper heat dissipation. - The plastic enclosure has a back plate that is separable from the front plate allowing the back plates (with the connectors) to be shipped directly to the installation site while all the engineering is done in the office. - If the controller is used and/or installed in a manner not specified, the functionality and the protection provided by the controller may be impaired. Any type of modification to any SLX Series product will void the product s warranty. Take special care to keep the front and back plate aligned when separating and joining them. Take reasonable precautions to prevent electrostatic discharges to each controller when installing, servicing or operating the controller. Discharge accumulated static electricity by touching your hand to a securely grounded object before working with each controller. 3. General Wiring Recommendations Turn off power before any kind of servicing. - All wiring must comply with electrical wiring diagrams as well as national and local electrical codes. - To connect the wiring to each controller, use the terminal connectors. It is recommended to remove the front plate from the back plate to facilitate the wiring process; however, it is possible to do all wiring with the front and back plates together. Use a small flat screwdriver to tighten the terminal connector screws once the wires have been inserted. - Power type cables (i.e. for power, 2- and 3-wire voltage and current inputs and outputs, as well as triac outputs) should be kept apart from other types of wiring to avoid any ambient noise transmission to other wires. - The board connectors accept wires or flat cables ranging from 22 to 14AWG (0.644 to 1.630mm diameter) per pole. However, power cables must remain between 18 and 14AWG (1.024 to 1.630mm diameter). - Do not connect the universal inputs, analog/digital outputs or common terminals to earth or chassis ground (unless stated otherwise). - The transformer powering each controller must be configured as a floating transformer (i.e. it should not be grounded). - Keep all wires away from high speed data transmission cables (ie. Ethernet, etc.). - Keep input and output wiring in conduits or trays, or close to the building frame if possible. 4. Mounting Instructions Each controller can be mounted on a DIN rail to speed up the installation procedure. The controllers are also equipped with two mounting holes of 0.25 (6.35mm) by 0.165 (4.191mm). They can be mounted in a panel or on a wall by using appropriate screw types (use sheet metal, thread forming or self-tapping screws accordingly). DIN Rail-Mounted Installation 1. Make sure that the DIN rail is properly mounted on the wall. 2. Simply clip controller onto the DIN rail. Wall-Mounted Installation 1. Open the controller by separating the front and back plate using the side clips. 2. From within the back plate use the mounting holes to mark the location of any holes that need to be drilled. 3. Remove the back plate and drill holes. 4. Finally, clean the perforated surface and fasten the device using the appropriate screw types. Page 2 of 9 SLX Series
5. Controller Dimensions 6. Power Wiring Voltage: 24VAC/DC; ± 15%, Class 2 To conform to Class 2 requirements in the United States, use transformers of 100VA or less to power the controller. When powering one or multiple devices, use the following method to calculate the power requirements of the required transformer: - Add up the maximum power consumption of all controllers and multiply this sum by 1.3. - If the resulting number is higher than 100VA, consider using multiple transformers. Use an external fuse on the 24VAC/DC side (secondary side) of the transformer, as shown in Figure 3, to protect all controllers against power line spikes. Maintain consistent polarity when connecting controllers and devices to the transformer. That is, the COM terminal of each controller and each peripheral should be connected to the same terminal on the secondary side of the transformer. The controllers are half-wave rectified. Connecting two half-wave power supplies to the same transformer without maintaining polarity will cause a short circuit. Controller 1 24VAC/DC 24V COM Fuse 24VAC AC Controller 2 24VAC/DC 24V COM Transformer Figure 3: Power Wiring AC. Figure 4: Power Wiring DC. The COM terminals of the controller are internally wired to the 24V COM terminal of the power supply. Therefore, if powering peripherals and controllers with the same transformer, it is essential to maintain polarity. Failure to do so will result in a short circuit and/or a damaged controller. Figure 2: (Top to Bottom) Rear View of the Large Enclosure, Rear View of the Small Enclosure, and Side View of the Large and Small Enclosure. SLX Series Page 3 of 9
7. Input Wiring Each controller has physical connections for inputs that are software configurable from within the controller s LNS plug-in. Each input can be configured for digital, resistive, current or voltage signals. Input types must be configured properly with the LMT to ensure proper input readings. Before connecting any input equipment to the controller, refer to the installation guide of the equipment manufacturer. For a wire length less than 75 (23m), either a shielded or unshielded 18AWG wire may be used. For a wire length between 75 and 200 (23m to 61m), a shielded 18AWG wire is recommended. The wire should be shielded on the controller side and the shield length should be kept as short as possible. Wiring Digital Inputs This input configuration is used to monitor digital dry contacts, as well as pulsed contacts (PC models only). Figure 5: Digital Input Digital Dry Contact (NO and NC). Wiring Resistive Inputs This input configuration is used to monitor 100Ω and 1000Ω RTDs, 10kΩ type II and III thermistors, as well as 10kΩ and 100kΩ (PC models only) potentiometers. On the SLX-PC-400 models and SLX-PC-500 models, the onboard 15 VDC output can be used to supply the current loop shown in Figure 8. Refer to the transducer installation guide for further details. Connect the current input according to the following figure if a 3-wire, 4-20mA transducer is being used. Figure 9: Current Input 3-Wire Transducer. Connect the current input according to the following figure if the transducer is powered by its own power source. Figure 10: Current Input Transducer with its Own Power Source. Wiring Voltage Inputs Voltage inputs have a range of 0 to 10VDC. Connect the voltage input according to the following figure if a 3-wire 0-10V transducer is being used. Transducer + Common 24VAC 0-10V 24VAC UIx COM Figure 11: Voltage Input 3-Wire Transducer. Connect the voltage input according to the following figure if the transducer is powered by its own power source. Figure 6: Resistive Input RTD /Thermistor Input. Figure 12: Voltage input Transducer with its Own Power Source. 8. SLX-RTS/SLX-STAT Wiring Figure 7: Resistive Input 10kΩ Potentiometer Input. Page 4 of 9 The ASCs do not support 100Ω or 1000Ω inputs. When using a 100Ω input, the wire length should be kept short so as to avoid a possible temperature offset. For example, an 18AWG wire, 25 (7.6m) in length can create an offset of 2 F (1.1 C). Wiring Current Inputs Current inputs have a range of 4 to 20mA. Connect the current input according to the following figure if a 2-wire, 4-20mA transducer is being used. Figure 8: Current Input 2-Wire Transducer. Each controller is compatible with the SLX-RTS line of standard room sensors. Refer to the SLX-RTS and SLX-STAT installation instructions for wiring details. 9. Output Wiring Each controller has physical connections for triac outputs and/or universal outputs, depending on the type and model. These outputs are all software configurable. Controller Triac Outputs Universal Outputs SLX-ASC-FCU-L 5 2 SLX-ASC-HPU-L 5 2 SLX-ASC-RTU-L 5 2 SLX-ASC-UV-L 5 2 SLX-PC-203 5 3 SLX-PC-300 0 8 Jumper 0-10VDC/0-20mA SLX Series
Controller SLX-PC-4x0 SLX-PC-4x3 SLX-PC-500 Triac Universal Jumper Outputs Outputs 0-10VDC/0-20mA 0 12 8 4 0 12 Before connecting any output equipment to the controller, refer to the installation guide of the equipment manufacturer. For a wire length less than 75 (23m), either a shielded or unshielded 18AWG wire may be used. For a wire length between 75 and 200 (23m to 61m), a shielded 18AWG wire is recommended. The wire should be shielded on the controller side, and the shield length should be kept as short as possible. Figure 15: Discrete 0 or 12VDC Universal Output Relay. Wiring Current Outputs The 0 to 20mA signal is configurable by jumper (available for SLX-PC-400 models and SLX-PC-500 models only). Figure 16: Current 0-20mA Universal Output and Jumper Configuration. Wiring Voltage Outputs Connect the 0 to 10VDC output according to the following figure. Wiring Triac Outputs Digital outputs are all made of triacs and there is no voltage present on the output terminals. Therefore, an external power source has to be added if necessary. To measure the state of a triac output, an external load must be connected. Connect the digital output according to the following figure if a relay is being controlled. Figure 17: Voltage 0-10VDC Universal Output. Connect the 0 to 10VDC output according to the following figure if an analog actuator is being controlled. Figure 18: Voltage 0-10VDC Universal Output Analog Actuator. Figure 13: Digital Triac Output Relay. Connect the digital output according to the following figure if a floating actuator is being controlled. Figure 14: Digital Triac Output Floating Actuator. Wiring Universal Outputs Universal outputs can be configured to provide either a discrete signal of 0 or 12VDC, a linear signal ranging from 0 to 10VDC or a 0 to 20mA signal (SLX-PC-400 models and SLX-PC-500 models). The discrete signal can be used to generate a pulse wave modulation (PWM) signal or a simple two-state signal. These outputs are protected by an autoreset fuse. Wiring Discrete Outputs When controlling a relay with a universal output, a diode must be connected in parallel to protect the controller from back-emf current, which occurs when the relay is turned off. It is recommended to use diodes that are part of the 1N400x family and they should be placed closer to the relay. 10. Communications Wiring The recommended cable type for LON communications is 22AWG (0.65 mm), twisted pair, unshielded. The LON communication wire is polarity insensitive and can be laid out in a bus, star, loop or free topology. For loop topology, polarity is important and special care must be taken when connecting the LON network to avoid a short circuit. It is recommended to use the bus topology network configuration for all LON communication wiring, as it allows for easy network troubleshooting. Connect both wires to the LON 1 or 2 terminals of the controller. If inserting multiple wires in the terminals, ensure that the wires are properly twisted together prior to inserting them in the terminal connectors. Figure 19: Communications Wiring. SLX Series Page 5 of 9
For more information and detailed explanations on network topology and wire length restrictions, refer to the Junction Box and Wiring Guideline for Twisted Pair LonWorks Networks, published by Echelon Corporation. It is important to use proper network terminators depending on the type of network topology used. Failure to do so can result in communication errors between controllers. Do not use multiple gauges of cable on the same communication bus, as this may also result in communication errors. Selecting Network Terminators Topology Part # Bus PDIDI-BT-TP10XX Free PDIDI-FT-TP10XX Figure 21: Memory Erase Jumper Location (J4) on SLX-PC-203 and SLX-PC-300. For a bus topology, two network terminators are required (one at each end of the bus topology channel). For a free topology, one network terminator is required, and it can be put anywhere on the channel. 11. Memory Erase Jumper Each controller features a memory erase jumper that can be used to erase the Neuron chip s memory. If an incorrect APB file is loaded into the controller, the Neuron chip's memory will be corrupted and no communication with the controller will be possible. The memory erase jumper can be used to correct this problem by resetting the Neuron chip s memory; the chip will then be in an application-less state. The memory erase jumper is labeled J2 on the ASCs, J4 on the SLX-PC-203 and SLX- PC-300, and J20 on the SLX-PC-400 models and SLX-PC-500 models. To erase the Neuron chip's memory using the memory erase jumper, do the following: 1. Disconnect the power to the controller. 2. Place a jumper on the proper pins on the controller. Figure 22: Memory Erase Jumper Location (J20) on SLX-PC-400 and SLX-PC-500. 3. Reconnect power to the controller. 4. The orange-colored service LED will blink rapidly indicating that it is erasing the Neuron chip's memory. When the service LED stops blinking and remains solid, the erase procedure is complete. The erase procedure typically takes between 2 and 10 seconds. 5. Disconnect the power to the controller and remove the jumper. 6. Reconnect the power. The service LED will blink twice and become solid indicating that the controller is applicationless. The proper APB (using the Commission or Load option in LNS, e.g. SLX Series LMT) can now be loaded into the controller. 12. Maintenance Turn off power before any kind of servicing. Figure 20: Memory Erase Jumper Location (J2) on SLX-ASC. Each controller requires minimal maintenance, but it is important to take note of the following: - If it is necessary to clean the outside of the front plate and/or the inside of the back plate, use a dry cloth. - Verify the tension of all wires and cables whenever the controller is serviced. Page 6 of 9 SLX Series
13. Disposal The Waste Electrical and Electronic Equipment (WEEE) Directive sets out regulations for the recycling and disposal of products. The WEEE2002/96/EG Directive applies to standalone products, ie. products that can function entirely on their own and are not a part of another system or piece of equipment. For this reason SLX Series products are exempt from the WEEE Directive. Nevertheless, they are marked with the WEEE symbol, indicating that disposal of the devices shall not be done together with municipal waste. Products must be disposed of at the end of their useful life according to local regulations and the WEEE Directive. SLX Series Page 7 of 9
14. Typical Rooftop Application Wiring Diagram Page 8 of 9 SLX Series
15. Troubleshooting Guide Controller is powered but does not turn on Fuse has blown (Auto-reset fuse) Disconnect the power, the input and the output terminals. Then wait a few seconds to allow the auto-reset fuse to cool down. Check the power supply and check input and output wiring. Reconnect the power. Power supply polarity Verify that consistent polarity is maintained between all controllers and the transformer. Ensure that the COM terminal of each controller is connected to the same terminal on the secondary side of the transformer. See Figure 3. Controller cannot communicate on a FTT network Absent or incorrect supply voltage 1. Check power supply voltage between 24VAC/DC ±15% and COM pins, and ensure that it is between acceptable limits. 2. Check for tripped fuse or circuit breaker. Overloaded power transformer Verify that the transformer used is powerful enough to supply all controllers. Network not wired properly Double check that the wire connections are correct. Absent or incorrect network termination Check the network termination(s). Incorrect APB file has been loaded Use the memory erase jumper to reset the Neuron chip's memory, then load the proper APB into the Service pin not working controller using a network management tool (e.g. LMT). Controller communicates well over a short network, but does not communicate on large network Network length Check that the total wire length does not exceed the specifications of the Junction Box and Wiring Guideline for Twisted Pair LonWorks Networks. Wire type Check that the wire type agrees with the specification of the Junction Box and Wiring Guideline for Twisted Pair LonWorks Networks. Network wiring problem Double check that the wire connections are correct. Absent or incorrect network termination Check the termination(s). Incorrect or broken termination(s) will make the communication integrity dependent upon a controller s position on the network. Extra capacitance Make sure that no extra capacitance is being connected to the network other than the standard FTT circuit, and a maximum of a 3 meter stub (in bus topology). Number of devices on network segment The number of controllers on a channel should never exceed 64. Use a router or a repeater in accordance exceeded to the Junction Box and Wiring Guideline for Twisted Pair LonWorks Networks. Network traffic Query node statistic to check errors. Use a LON protocol analyzer to check network traffic. Hardware input is not reading the correct value Input wiring problem Check that the wiring is correct according to this document and according to the peripheral device s manufacturer. Open circuit or short circuit Use a voltmeter to check the voltage on the input terminal. Short circuit (0V) and Open circuit (5V). Configuration problem Use the controller configuration plug-in to check the configuration of the input. Hardware output is not operating correctly Output wiring problem Check that the wiring is correct according to this document and according to the peripheral device s manufacturer. Configuration problem Use the controller configuration plug-in to check the configuration of the input.. Service LED (Orange Color) Off (does not apply to PC models) Repeated Blink (PC models only) On Slow Blink (1 sec. On, 1 sec. Off) Fast Blink (0.3 sec. On, 1 sec. Off) The controller is in normal operation. The controller is in normal operation. The LED will blink according to the controller code execution time. The controller is application-less. Appropriate action: Reload the APB. The controller is unconfigured. Appropriate action: Commission the controller. Watchdog time out. Application corrupted. Appropriate action: Use the memory erase jumper to reset the Neuron chip's memory, then load the proper APB into the controller using a network management tool (e.g. LMT). Information in this publication is based on current specifications. The company reserves the right to make changes in specifications and models as design improvements are introduced. Other product or company names mentioned herein may be the trademarks of their respective owners. 2009 Siemens Building Technologies, Inc. Siemens Building Technologies, Inc. 1000 Deerfield Parkway Buffalo Grove, IL 60089-4513 U.S.A. Document No. 997-1000 Country of Origin: US Page 9 of 9