14
* Required torque values may vary depending on individual system designs and
size of terminals. Refer to project documentation for additional information.
4.4 TraceNet Panel Wiring
TraceNet TCM Series panels are configured and prewired into an integrated heat
trace control and monitoring panel. Clean terminal strips are provided to facilitate
the field wiring into the panels. Refer to the project specific panel drawings when
installing the field wiring within the panel. Anticipated field wiring is
conventionally shown by dashed lines. All field power wiring materials used shall
be suitable for the intended service and shall be rated for insulation service
temperatures of at least 221°F (105°C) unless higher values are otherwise noted
in project specifications. All TraceNet component terminal block connections
should be tightened using a torque indicating screw driver to the levels indicated
in
Table 4.1
.
4.5 Serial Communication Wiring
TraceNet TCM Series panels may be linked together for communications with an
RS-485 communication cable at distances up to 4000 ft (1200 m)
1
. In addition, a
120 Ohm termination module should be used at each end of the RS-485 network.
The recommended communication cables for use in the RS-485 network are as
given in
Table 4.2
.
1
Max
length
depends
on
site
conditions
and
baud
rate
Protective earth/ground connection is required. Ground/earth with minimum 12 AWG
conductors to a known and proven plant ground or by grounding rods.
