Digital Display Window; Specifications; Performance - Emerson Nelson CM-1 Manual

DIGITAL DISPLAY WINDOW

The circuit numbers being scanned by the system are displayed here in the status area.
Conditions:
1) No light bar energized below the circuit number indicates the circuit is de-energized. This is a non-
alarm condition.
2) The green light bar energized indicates that the circuit is energized and functioning satisfactorily.
This is a non-alarm condition.
3) Voltage - the (red) indicator energized indicates that voltage is not present when the circuit should be
energized. This is an alarm condition.
4) Current - the (red) indicator energized indicates that current flow has dropped below the adjustable
level set on the sensor card. The minimum level is 50mA, the maximum is 30A. This would indicate
an open circuit on a series heating cable. On parallel cables this would indicate a possible break in
the power wiring between the heater cable power termination and the CM-1 panel or the failure of a
portion of the parallel heating cable.
5) Continuity - the (red) indicator energized would indicate a loss of continuity in the bus wires of a
parallel heater cable.

SPECIFICATIONS

PERFORMANCE

Ambient Temperature:
Power Input:
Heater Voltage Range:
Amperage Range:
Relative Humidity:
Hazardous Locations:
Alarm Output:
Display:
www.nelsonheaters.com
GA-2129 Rev. 11
Sheet 18 of 22
Jul. 2018
8
1
CIRCUIT
Monitor Display
Figure 16
-40° to +130°F
120VAC; 1A
85VAC to 300VAC
0.05 to 30.0A
0-95% max. non-condensing boards are conformal coated and gold plated
connectors are used.
Approved for Class I, Division 2, Groups A, B, C, & D; Class II, Groups F &
G; Class III, Div. 1 & 2.
Solid State output; 120V AC/DC @ 100ma max. Optional relay with dry
contact available. Output is energized during normal operation.
Scanner - Single line numeric L.E.D.
Alarm - L.E.D. bar indicators for voltage, current, and continuity.
HEATER ON
CONTINUITY
CURRENT
VOLTAGE