Figure 6-4: Vp-2040 Rs-485 Communication Wiring - Veesta World V-PM2000 Series User Manual

VP-2040 Enhanced IED
V-PM2000 Series, Veesta Power Measurement
Instructions & User's Manual
(*) Z
Z
R
C
B- A+
VP-2040
All rights reserved. Passing on and copying of this document, use and communication of its contents not permitted without written authorization.
= Terminating Impedance
T
at each end (typically R=120
Ohms and C=1nF)
Up to 32
devices
(*)
T
RS-485

Figure 6-4: VP-2040 RS-485 Communication Wiring

Chapter 6 - Unit Installation
Ground shield at
SCADA / PLC / RTU
Computer only
(one end grounding)
B- A+
RS-485
VP-2040
Master
(Computer / RTU)
RS-485
D- D+
Z (*)
T
R
C
Shield
Twisted pair
shields cable
B- A+
RS-485
VP-2040
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