Serial Communication Ports - gefran GFX4-IR Series Installation And Operation Manual

3.8 s
erial communication ports
Port1 (local bus): Modbus serial interface – connectors S1, S2, S3
Figure 30
Connector S3 to connection at GFX-OP terminal or to Geflex slave modules (GFX-S1, GFX-S2)
Table 20
Connector S1/S2
RJ10 4-4 pin
4
3
2
1
Cable type: flat telephone cable for pin 4-4 conductor 28AWG
80404L_MHW_GFX4-IR_03-2020_ENG
Nr. Pin Name
1 GND1 (**)
2 Tx/Rx+
3 Tx/Rx-
4 +V (reserved)
4 +VI
3 Tx/Rx-
S1
2 Tx/Rx+
1 GNDI
4 +VI
3 Tx/Rx-
S2
2 Tx/Rx+
Port 1
1 GNDI
S3
S4
Port 2
S5
Description
-
Data reception/transmission (A+)
Data reception/transmission (B-)
-
Note
(*) Insert the RS485 line
termination in the last device
on the Modbus line, see dip-
switches.
(**) Connect the GND signal
among Modbus devices with a
line distance > 100 m.
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