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v10.0.1.x for R2026a
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IO504 Pin Mapping

IO504 Pin Mapping — Reference information about the I/O module connector

Front Connector Pin Mapping

PinSignal (RS232 Mode)Signal (RS422/RS485 Mode) PinSignal (RS232 Mode)Signal (RS422/RS485 Mode)
1Ground 26Ground
2Channel 1 TxChannel 1 Tx(-) / Dx(-)27Channel 6 TxChannel 6 Tx(-) / Dx(-)
3Channel 1 RxChannel 1 Tx(+) / Dx(+)28Channel 6 RxChannel 6 Tx(+) / Dx(+)
4Channel 1 RTSChannel 1 Rx(-)29Channel 6 RTSChannel 6 Rx(-)
5Channel 1 CTSChannel 1 Rx(+)30Channel 6 CTSChannel 6 Rx(+)
6Ground31Ground
7Channel 2 TxChannel 2 Tx(-) / Dx(-)32Channel 7 TxChannel 7 Tx(-) / Dx(-)
8Channel 2 RxChannel 2 Tx(+) / Dx(+)33Channel 7 RxChannel 7 Tx(+) / Dx(+)
9Channel 2 RTSChannel 2 Rx(-)34Channel 7 RTSChannel 7 Rx(-)
10Channel 2 CTSChannel 2 Rx(+)35Channel 7 CTSChannel 7 Rx(+)
11Ground36Ground
12Channel 3 TxChannel 3 Tx(-) / Dx(-)37Channel 8 TxChannel 8 Tx(-) / Dx(-)
13Channel 3 RxChannel 3 Tx(+) / Dx(+)38Channel 8 RxChannel 8 Tx(+) / Dx(+)
14Channel 3 RTSChannel 3 Rx(-)39Channel 8 RTSChannel 8 Rx(-)
15Channel 3 CTSChannel 3 Rx(+)40Channel 8 CTSChannel 8 Rx(+)
16Ground41Ground
17Channel 4 TxChannel 4 Tx(-) / Dx(-)42+5 V Termination supply
18Channel 4 RxChannel 4 Tx(+) / Dx(+)43-
19Channel 4 RTSChannel 4 Rx(-)44-
20Channel 4 CTSChannel 4 Rx(+)45-
21Ground46-
22Channel 5 TxChannel 5 Tx(-) / Dx(-)47-
23Channel 5 RxChannel 5 Tx(+) / Dx(+)48-
24Channel 5 RTSChannel 5 Rx(-)49-
25Channel 5 CTSChannel 5 Rx(+)50-
[Note]Note

There is no fuse at the Termination Supply output. Ensure, therefore, that the current does not exceed 400mA.