A.4 | RS485 Ports Pinout |
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| his section covers the serial ports pinout for the following models: |
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| Operating |
| Modbus Plus |
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| Mounting | Power |
| Network | Serial | Serial |
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Part Number |
| Method | (Nominal) |
| Cable | Ports | Protocol |
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NW±BM85E485 |
| Panel or Shelf | 115/230 Vac or |
| Single or Dual | RS485 | Programmable, |
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| 24 Vdc |
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| User Defined |
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NW±BM85S485 |
| Panel or Shelf | 115/230 Vac or |
| Single or Dual | RS485 | Programmable, |
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| 24 Vdc |
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| User Defined |
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Figure 27 shows the pin configuration for the 485 port connectors. If you are fabricating cables for your application, the panel connector is a DB9.
he Modbus lus inline connector (part number A-MBK-085) is an acceptable substitute for an 485 cable connector. Do not use a Modbus lus terminating connector (A-MBK-185) in this application.
REAR PANEL SERIAL PORT CONNECTORS
5 4 3 2 1
9 8 7 6
Figure 27 Serial Ports Pinout ± RS485
Pin
BM85 Direction
Purpose
1 | ±± | Chassis ground |
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2 | In/Out | Receive/Transmit A |
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3 | In/Out | Receive/Transmit B |
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4 ... 9 | ±± | not used |
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88 | Compatible Devices and Cables | 31007492 |
