ALLEN BRADLEY 1747-L551 PLC Processor

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A–10 Setting Up the DH-485 Network Important: The SLC 500 Series A (only) processors set the maximum node address to 31 when power is cycled increasing initialization and response time of the network. Maximum Number of Communicating Devices SLC 500 fixed and SLC 5/01 processors can be selected by two initiators maximum at the same time. Using more than two initiators to select the same SLC 500 fixed and SLC 5/01 processors at the same time can cause communication timeouts. Installing the DH-485 Network To install a DH-485 network, you will need tools to strip the shielded cable and to attach the cable and terminators to the Isolated Link Coupler. Install the DH-485 network using the following tools (or equivalent): Description Part Number Manufacturer Shielded Twisted Pair Belden #3106A or #9842 Belden Cable Stripping Tool 45-164 Ideal Industries 1/8 ” Slotted Screwdriver Not Applicable Not Applicable DH-485 Communication Cable and Isolated Link Coupler The link coupler provides a connection for each node. The isolated link coupler electrically isolates the DH-485 communication interface from the processor and peripheral connections. Electrical-optical isolation is provided to 1500V. The suggested DH-485 communication cable is Belden #3106A or #9842 cable. The cable is jacketed and shielded with two twisted wire pairs and a drain wire. One pair provides a balanced signal line, and one wire of the other pair is used for a common reference line between all nodes on the network. The shield reduces the effect of electrostatic noise from the industrial environment on the network communication. Installing the DH-485 Communication Cable The communication cable consists of a number of cable segments daisy-chained together. The total length of the cable segments cannot exceed 1219 m (4000 ft). Publication 1747-6.2
Setting Up the DH-485 Network A–11 When cutting cable segments, make them long enough to route them from one link coupler to the next with sufficient slack to prevent strain on the connector. Allow enough extra cable to prevent chafing and kinking in the cable. Belden #3106A or #9842 Belden #3106A or #9842 Belden #3106A or #9842 Link Coupler 1747-AIC Link Coupler 1747-AIC Link Coupler 1747-AIC DH-485 Interface DH-485 Interface DH-485 Interface Peripheral Connector Connector Connector Peripheral Peripheral CPU CPU CPU Power Power Power Important: A daisy-chained network is recommended as shown above. We do not recommend the following: Belden #3106A or #9842 Belden #3106A or #9842 Belden #3106A or #9842 Connector Connector Connector Incorrect Publication 1747-6.2
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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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3-2 System Installation Recommendat
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3-10 System Installation Recommenda
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3-12 System Installation Recommenda
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4-2 Mounting Your SLC 500 Control S
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5-2 Identifying the Components of Y
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5-10 Identifying the Components of
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6-2 Installing Your Hardware Compon
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6-10 Installing Your Hardware Compo
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7-2 Wiring Your I/O Modules Contact
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7-4 Wiring Your I/O Modules Prepari
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7-6 Wiring Your I/O Modules Feature
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7-8 Wiring Your I/O Modules Octal L
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7-10 Wiring Your I/O Modules Using
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This chapter describes how to start
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Starting Up Your Control System 8-3
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Page 117 and 118: Starting Up Your Control System 8-1
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 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
Page 151 and 152: Troubleshooting 10-25 Returning the
Page 157 and 158: 11-2 Replacement Parts Catalog Numb
Page 159 and 160: The information in this appendix wi
Page 161 and 162: Setting Up the DH-485 Network A-3 O
Page 163 and 164: Setting Up the DH-485 Network A-5 E
Page 165 and 166: Setting Up the DH-485 Network A-7 I
Page 167: Setting Up the DH-485 Network A-9 T
Page 171 and 172: Setting Up the DH-485 Network A-13
Page 173 and 174: Setting Up the DH-485 Network A-15
Page 175 and 176: This appendix provides an overview
Page 177 and 178: RS-232 Communication Interface B-3
Page 195 and 196: This appendix provides an overview
Page 197 and 198: Setting Up the DH+ Network C-3 Wiri
Page 199 and 200: This appendix provides a brief intr
Page 201 and 202: Control Networks D-3 DeviceNet Netw
Page 203 and 204: - Use this Table to Calculate the
Page 205 and 206: Power Supply Worksheet E-3 Hardware
Page 207 and 208: This appendix will assist you in ca
Page 209 and 210: Calculating Heat Dissipation for th
Page 215 and 216: This appendix: • describes SLC 5/
Page 217 and 218: Communicating with Devices on an Et
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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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