Modbus Port Pin-Out And Wiring - Automation Direct T1K-MODBUS-M User Manual

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T1K–MODBUS Specifications
MODBUS Port Pin–out and Wiring
15-pin Female
D Connector
RS–232C
Point-to-point
DTE Device
RS–422
Network
RS–485
Network
6
11
1
10
15
5
TXD
PC/PLC
RXD
MODBUS
Master
Signal GND
RXD+
RXD–
TXD+
TXD–
Signal GND
PC/PLC
MODBUS
Master
The recommended cable
for RS422 is Belden
9729 or equivalent.
PC/PLC
MODBUS
Master
MODBUS Port Pin Descriptions
1 5V 5 VDC
2 TXD2 Transmit Data (RS232C)
3 RXD2 Receive Data (RS232C)
4 RTS2 Ready to Send (RS–232C)
5 CTS2 Clear to Send (RS–232C)
6 RXD2– Receive Data – (RS–422)
7 0V Logic Ground
8 0V Logic Ground
9 TXD2+ Transmit Data + (RS–422)
10 TXD2 – Transmit Data – (RS–422)
11 RTS2 + Request to Send + (RS–422)
12 RTS2 – Request to Send – (RS–422)
13 RXD2 + Receive Data + (RS–422)
14 CTS2 + Clear to Send + (RS422)
15 CTS2 – Clear to Send – (RS–422)
TXD+ / RXD+
TXD– / RXD–
Signal GND
2 TXD
3 RXD
4 RTS
5 CTS
MODBUS
7 0V
Port
Termination
9 TXD+
Resistor on
10 TXD–
13 RXD+ last slave only
6 RXD–
11 RTS+
12 RTS–
MODBUS
14 CTS+
Port
15 CTS–
7 0V
Termination
Resistor on
9 TXD+
last slave only
13 RXD+
6 RXD–
10 TXD–
MODBUS
11 RTS+
Port
14 CTS+
12 RTS–
15 CTS_
7 0V