GPD315 Modbus RTU Technical Manual TM 4325
Page
2
Chapter 2
GPD315 Modbus RTU Connections
Wiring
Locate terminals S+, S-, R+, and R- on the control terminal block.
Figure 2-1 Location of Terminals and Dip switches
Twisted pair, shielded wire should be used for all RS-485 connections. The shielded wire should
be separated and connected per the drawing below to eliminate interference due to noise.
Figure 2-2 Shielded Wire Termination
R+ R-
S+ S-
S+/R+
S-/R-
S+/R+
-
S-/R-
Outer Jacket
S+
S-
R+
R-
S+
S-
R+
R-
Shiel
Outer Jacket
Two Wire RS-485
Four Wire RS-485
