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54
RS-232C Cable Connection
RS-485 Cable Connection
55
Interface Connector
Serial Interface (RS-232)
Pin No. Signal name Direction Function
1 FG - Frame Ground
2 TxD Output Transmit Data
3 RxD Input Receive Data
4 RTS Output Ready To Send
5 CTS Input Clear To Send
6 DSR Input Data Set Ready
7 SG - Signal Ground
20 DTR Output Data Terminal Ready
Serial Interface (RS-485)
Pin No. Signal Name Direction Function
1 FGND - Frame Ground
2 SD2 Output
3 SD1 Output
Send Data
4 RD2 Input
5 RD1 Input
Receive Data
7 SGND - Signal Ground
8
9
DR2
DR1
Output Same as DTR(RS-232)
10
11
CS2
CS1
Input Same as DSR(RS-232)