PowerLogic ION7550 / ION7650 Installation Guide
Step 5: Wire the Communications
RS-232 Connections (COM1)
DB9 Null Modem
Wiring Diagram
DTE |
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(computer) |
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| (meter) |
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Null modem cable pinout Pin 3 - Transmit Data - Pin 2 Pin 2 - Receive Data - Pin 3 Pin 7 - Request to Send- Pin 8 Pin 8 - Clear to Send- Pin 7 Pin 5 - Signal Ground- Pin 5 Pin 6 - Data Set Ready- Pin 4
Pin 4 - Data Terminal Ready- Pin 6
Specification | Meter Connected to Computer | Meter Connected to External | |
Modem | |||
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Connector Type | DB9 female end for mating with | male connector on the meter | |
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Wire | Null modem | ||
Maximum Cable Length | 15.2 m (50 ft) |
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Data Rate | 300 – 115,200 bps |
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Isolation | Optical |
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Duplex | Full |
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Compliance | ANSI/IEEE | ||
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RS-485 Connections (COM1 and COM2)
SH | ||
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+ | ||
Connector Type | Captured wire | |
Wire |
| Shielded twisted pair |
| 0.33 mm2 (22 AWG) or larger | |
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Maximum Cable Length | 1219 m (4000 ft) total for entire bus | |
Data Rate |
| 300 – 115,200 bps |
Maximum Devices (per bus) | 32 | |
Isolation |
| Optical |
Duplex |
| Half |
Compliance |
| ANSI/IEEE |
| and fast transient tests | |
Connect SH at |
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one end only |
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Infrared Connections (COM4) |
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Interface |
| ANSI C12.18 Type II optical port |
Location |
| Front of meter |
Data Rate |
| 1,200 – 19,200 bps |
Duplex |
| Half |
16 | © 2007 Schneider Electric. All rights reserved. |
