FAQ / Frequently Asked Questions

Please inform me the pin assignment for RS-422/485 port.

RS-422/485 port is RS-530 specification.

Pin assignment of RS-530
Pin Signal Signal name Pin Signal Signal name
1 FG Shield ground 14 TXD [B]: + Transmission data
2 TXD [A]: - Transmission data 15 TXC2 [A]: - Transmission timing DCE
3 RXD [A]: - Receiving data 16 RXD [B]: + Receiving data
4 RTS [A]: - Request of transmission 17 RXC [A]: - Receiving timing DCE
5 CTS [A]: - Capable of transmission 18 Not defined  
6 DSR [A]: - Data set ready 19 RTS [B]: + Request of transmission
7 SG Signal ground 20 DTR [A]: - Data terminal ready
8 DCD [A]: - Data carrier detect 21 Not defined  
9 RXC [B]: + Receiving timing DCE 22 DSR [B]: + Data set ready
10 DCD [B]: + Data carrier detect 23 DTR [B]: + Data terminal ready
11 TXC1 [B]: + Transmission timing DTE 24 TXC1 [A]: - Transmission timing DTE
12 TXC2 [B]: + Transmission timing DCE 25    
13 CTS [B]: + Capable of transmission