gefran GFX4-IR Series Installation And Operation Manual page 24

Port2 (fieldbus): connectors S4, S5 MODBUS RTU/MODBUS RTU
Figure 31 Port2: Fieldbus Modbus RTU/Modbus RTU interface
Table 21
Connector S4/S5
RJ10 4-4 pin
4
3
2
1
Cable type: flat telephone cable for pin 4-4 conductor 28AWG
24
Nr. Pin Name
1 GND1 (**)
2 Tx/Rx+
3 Tx/Rx-
4 +V (reserved)
Description
-
Data reception/transmission (A+)
Data reception/transmission (B-)
-
80404L_MHW_GFX4-IR_03-2020_ENG
Connector S5
Connector S4
Line termination (*)
Note
(*) Insert the line termination in the
last device on the Modbus line.
(**) Connect the GND signal
among Modbus devices with a line
distance > 100 m.