EngA CenCon

CenCon
42
H-XM
For control of staged electric heat (LMK and /K) appliances.
BASIC OPERATION
For staged electric heater operation the H-XM will sequence on and off stages of electric heat to attempt to
maintain the discharge temperature setpoint. As with all staged systems, expect the discharge temperature to
fluctuate from setpoint as stages are turned on and off. The H-XM can stage up to 7 stages of electric heat.
Additional stages are typically based on ambient temperature.
TERMINAL DESCRIPTION
Terminal
Type
Name
Description
Value
H N
Power
Supply
24Vac Grounded Neutral
24 Vac
GND
Ground
Connect to chassis.
LmA B
Modbus
Internal Network
SCR AO
Modulating
output
Modulating output to external SCR controller. 0-10 Vdc
EnH
DI
Enable heat
24V must be applied to allow heating function.
24/120 Vac
CMa COM
Common to
output ‘a’.
Common power relays ‘a’. 24/120 Vac
H1a
DO
Heating stage #1
Output stage #1 heat
ing, powered from common ‘a’.
24/120 Vac
H2a
DO
Heating stage #
2
Output stage #2 heat
ing, powered from common ‘a’.
24/120 Vac
H3a
DO
Heating stage #
3
Output stage #3 heat
ing, powered from common ‘a’.
24/120 Vac