GE Industrial Solutions POWER LEADER PMCS Network Architecture Guide - Manual (Page 48)

Power Management Control System
Chapter 3 – Network Wiring and Construction
38
3–1 Wiring Requirements
Each type of network (Ethernet, Modbus, and commnet)
has unique wiring requirements. These rules are
summarized in Table 13. Further detail is provided
following the table. WARNING: The National Electrical Code (NEC)
and all applicable local codes must be followed
when installing wiring.
Network Wiring Required Shield Grounding Termination
Ethernet 10Base-T or 10Base-FL
CAT-3, 4, or 5 UTP, Rated 300V. A 600V
requirement may be satisfied by applying
600V tubing to the cable.
See 10Base-T or 10Base-FL
wiring standards. Check with
your LAN administrator. See 10Base-T or 10Base-FL
wiring standards. Check with
your LAN administrator.
Modbus Indoors/outdoors in conduit above grade
Belden 3074F – Data Tray 600 V industrial
twinax 18 AWG (7X26); or
Belden 9841 – 300 V Communication cable
24 AWG (7X32); or
Alpha 6412 – 300 V Communication cable
24 AWG (7x32).
NOTES:
Use one of the above approved
cables that meet the NEC and UL
requirements for the application. A 600 V
requirement may be satisfied by using the
Belden 3074F or by applying 600 V tubing to
either the Belden 9841 or Alpha 6412. No
substitutions are permitted.
Each RS-485 network should
be grounded at the host and
at the RS-485 OUT port of
each IED, with no continuity
between wire-segment
shields. (See Section 2–4,
rule 4) The RS-485 cables must be
terminated at each end of the
network. The terminator
should be a 120-ohm,
1/2 -watt
resistor, 5%. (See section titled
Termination
in this chapter
for specific details on Connect
Tech RS-485 card and
Ethernet Gateway.)
Commnet Indoors/outdoors in conduit above grade
Belden 8719 – 600 V shielded
instrumentation cable, 16 AWG (19X29).
Below-grade applications 5
Belden 83702.
Each commnet segment’s
cable shield must be
grounded at the Modbus
Concentrator at the port to
which it is connected. N/A: no termination is needed
on commnet segments.
Table 13. Wiring requirements.
5 Belden 83702 is rated for direct burial and air plenum, non-conduit applications, but the length limits for this cable are two-thirds of the lengths
specified in the configuration rules of Chapter 2.