User`s manual

3-21
3.6 Connection
INP-TN5A0202-E
Connection with PLC
RS-232C connection
Communication unit This unit
Pin No. Signal Pin No. Signal
1CD 21 TX
2 RD(RXD) 22 RX
3 SD(TXD) 23 SG
4 ER(DTR) 24 A
5SG 25 B
6 DR(DSR) 26 SG
7 RS(RTS) 27 A
8 CS(CTS) 28 B
9 RI(CI) 29 –
30 –
RS-422 connection
1:1 connection
Communication unit This unit
Signal Pin No. Signal
SDA 21 TX
SDB 22 RX
RDA 23 SG
RDB 24 A
SG 25 B
FG 26 SG
27 A
28 B
29
−
Terminating resistance
Terminating resistance
Terminating resistance
Terminating resistance
1:N connection
Communication unit This unit 1 This unit 2
Signal Pin No. Signal Pin No. Signal
SDA 21 TX 21 TX
SDB 22 RX 22 RX
RDA 23 SG 23 SG
RDB 24 A 24 A
SG 25 B 25 B
FG 26 SG 26 SG
27 A 27 A
28 B 28 B
29 – 29 –
RS-422/RS-485 cable 30 – 30 –
Terminating resistance
Terminating resistance
Terminating resistance
Terminating resistance