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4
Electrical installation
Festo – GDCP-CMMD-AS-HW-EN – 1404NH – English
37
[X5] RS232
Pin
Value
Description
5
1
2
3
4
6
7
8
9
1
–
–
–
2
RS232_RxD
10 V, Ri
>
2 kΩ
Receive signal
3
RS232_TxD
10 V, Ra
<
2 kΩ
Transmission signal
4
RS485_A
Do not connect!
5
GND
0 V
Reference potential 0 V DC,
not galvanically isolated
6
–
–
–
7
–
–
–
8
–
–
–
9
RS485_B
Do not connect!
Tab. 4.17 Pin allocation RS232 [X5]
[X5] RS485
Pin
Value
Description
5
1
2
3
4
6
7
8
9
1
–
–
2
RS232_RxD
Do not connect!
3
RS232_TxD
Do not connect!
4
RS485_A
–
Positive transmission and reception
signal
5
GND
0 V
Reference potential 0 V DC,
not galvanically isolated
6
–
–
–
7
–
–
–
8
–
–
–
9
RS485_B
–
Negative transmission and reception
signal
Tab. 4.18 Pin allocation RS485 [X5]