ALLEN BRADLEY 1747-L551 PLC Processor

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Wiring Your I/O Modules 7–3 Sinking Device with Sourcing Input Module Circuit The field device is on the negative side of the power supply between the supply and the input terminal. When the field device is activated, it sinks current from the input circuit. _ DC POWER SUPPLY + FIELD DEVICE I Input DC INPUT CIRCUIT VDC Sinking Device with Sourcing Output Module Circuit The field device is on the negative side of the power supply between the supply and the output terminal. When the output is activated, it sources current to the field device. + DC POWER SUPPLY _ FIELD DEVICE VDC I Out DC OUTPUT CIRCUIT DC Com Sourcing Device with Sinking Output Module Circuit The field device is on the positive side of the power supply between the supply and the output terminal. When the output is activated, it sinks current from the field device. VDC + DC POWER SUPPLY _ FIELD DEVICE I Out DC OUTPUT CIRCUIT DC Com Publication <strong>1747</strong>-6.2
7–4 Wiring Your I/O Modules Preparing Your Wiring Layout Careful wire routing within the enclosure helps to cut down electrical noise between I/O lines. Follow these rules for routing your wires: • Route incoming power to the controller by a separate path from wiring to I/O devices. Where paths must cross, their intersection should be perpendicular. Important: Do not run signal or communications wiring and power wiring in the same conduit. • If wiring ducts are used, allow for at least two inches between I/O wiring ducts and the controller. If the terminal strips are used for I/O wiring, allow for at least two inches between the terminal strips and the controller. • Limit the cable length for the TTL input module to 15.24 m (50 ft) per point and 3.05 m (10 ft) per point for the TTL output module. Use low power DC I/O wiring even though it is less tolerant to electrical noise. ! ATTENTION: Handle the TTL module by its ends, not metallic surfaces. Electrostatic discharges can damage the module. Do not expose the TTL module to electrostatic charges. • Segregate I/O wiring by signal type. Bundle wiring with similar electrical characteristics together. Wires with different signal characteristics should be routed into the enclosure by separate paths. Refer to Allen-Bradley Programmable Controller Grounding and Wiring Guidelines, Publication Number 1770-4.1. ! ATTENTION: If the controller is being installed within a potentially hazardous environment (that is, Class I, Division 2), all wiring must comply with the requirements stated in the National Electrical Code 501-4 (b). Publication <strong>1747</strong>-6.2
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Allen-Bradley SLC 500 Modular Hardw
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The information below summarizes th
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iv Table of Contents DH-485 Interfa
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vi Table of Contents Recommendation
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viii Table of Contents Connecting t
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x Table of Contents Calculating Hea
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P-2 Preface How to Use this Manual
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P-4 Preface Conventions Used in thi
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1-2 Quick Start for Experienced Use
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2-2 Selecting Your Hardware Compone
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2-10 Selecting Your Hardware Compon
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Page 65 and 66: 4-2 Mounting Your SLC 500 Control S
Page 71 and 72: 5-2 Identifying the Components of Y
Page 79 and 80: 5-10 Identifying the Components of
Page 87 and 88: 6-2 Installing Your Hardware Compon
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Page 97: 7-2 Wiring Your I/O Modules Contact
Page 101 and 102: 7-6 Wiring Your I/O Modules Feature
Page 103 and 104: 7-8 Wiring Your I/O Modules Octal L
Page 105 and 106: 7-10 Wiring Your I/O Modules Using
Page 107 and 108: This chapter describes how to start
Page 109 and 110: Starting Up Your Control System 8-3
Page 119 and 120: This chapter covers the following m
Page 121 and 122: Maintaining Your Control System 9-3
Page 127 and 128: In this chapter, you will learn abo
Page 129 and 130: Troubleshooting 10-3 Replacing Fuse
Page 131 and 132: Troubleshooting 10-5 If the LEDs in
Page 133 and 134: Troubleshooting 10-7 If the LEDs in
Page 135 and 136: Troubleshooting 10-9 Identifying SL
Page 137 and 138: Troubleshooting 10-11 Troubleshooti
Page 139 and 140: Troubleshooting 10-13 If the LEDs i
Page 141 and 142: Troubleshooting 10-15 If the LEDs i
Page 143 and 144: Troubleshooting 10-17 Identifying S
Page 145 and 146: Troubleshooting 10-19 If the RS232
Page 147 and 148: Troubleshooting 10-21 Identifying P
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Troubleshooting 10-23 If the LEDs i
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Troubleshooting 10-25 Returning the
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Troubleshooting 10-27 Troubleshooti
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Troubleshooting 10-29 Troubleshooti
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11-2 Replacement Parts Catalog Numb
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The information in this appendix wi
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Setting Up the DH-485 Network A-3 O
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Setting Up the DH-485 Network A-5 E
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Setting Up the DH-485 Network A-7 I
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Setting Up the DH-485 Network A-9 T
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Setting Up the DH-485 Network A-11
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This appendix provides an overview
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RS-232 Communication Interface B-3
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This appendix provides an overview
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Setting Up the DH+ Network C-3 Wiri
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This appendix provides a brief intr
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Control Networks D-3 DeviceNet Netw
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- Use this Table to Calculate the
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Power Supply Worksheet E-3 Hardware
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This appendix will assist you in ca
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Calculating Heat Dissipation for th
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This appendix: • describes SLC 5/
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Communicating with Devices on an Et
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You can find the following terms us
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Glossary GL-3 Initiator — A node
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Glossary GL-5 Signal Delay — For
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I-2 Index hardware features, 5-2, 6
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I-4 Index DH-485 Communication Inte
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I-6 Index keyswitch positions for t
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I-8 Index Publication 1747-6.2 Q Qu
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I-10 Index T testing inputs, 8-5 ou
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ALLEN BRADLEY 1747-L551 PLC Processor

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