Emerson Nelson CM-1, Manual

Page: 6 / 24

www.nelsonheaters.com
GA-2129 Rev. 11
Sheet 6 of 22
Jul. 2018
SIGNAL WHEN TO MONITOR HEATER
The monitor looks for a closed contact signal from a temperature controller before it tries to monitor the
heater for current, voltage, and continuity. The default set-up requires an input signal for each monitor
channel. When a group of heater channels are controlled by a single thermostat (grouped or ambient
control), the panel inputs have to wire in parallel to the single contact signal. Stamped brass jumpers are
provided with the panel to reduce the wiring required for this type of connection.
FIELD WIRING
Typical system wiring diagrams are included in this manual for field wiring. These wiring diagrams are
located at the back of the manual. The PLT-CMD is used to monitor bus continuity on a parallel type heating
cable. After the installing the heater cable on the pipe, connect the PLT-CMD to the opposite end of the
power connection kit.
Silicone
Pipe Clamps
*Fiberglass Tape
*Heater Cable
Stand-off
Sealing Grommet
CMD Device
Conduit Locknut
Gasket
J-Grommet - Overjacket Product
B-Grommet - Base Product
U-Grommet - non-standard construction
Label
Box Cover Gasket
Box Cover
Power Termination
Box Adapter
*ITEMS NOT INCLUDED IN KIT
PLT-CMD Continuity Monitor Device
Figure 2