A
M-TRAC1
IOM-55
May 2019
6
CONTROLLER DESCRIPTION
TERMINALS
TABLE 1
Terminal
Description
HD
0-10 Vdc output to ball valve actuator
Q1
Input terminal for single discharge sensor
Q2
Input terminal for two discharge sensors wired in series
U
Sensor common
SP
Output from the built in set point POT.
RP
Positive supply for a remote set point POT.
RS
Return from the remote set point POT.
S
Setpoint enable
+ / -
2 to 10 Vdc input
PF
Not used
H
24 Vac hot
N
24 Vac neutral
FS
Fan switch input
HS
Heat switch input
LMT
Input from safety limit (high limit)
VN
Neutral for the 120 Vac Main gas valve feedback
VFB 120
Hot for the 120 Vac Main gas valve feedback
FR
Flame relay control
CFR
Flame relay control common
PV1 / PV2
Pilot Valve control contacts
C
Input power supply to feed DM, SA and AL outputs
DM
Damper enable output
SA
Supply blower output
AL
Alarm output or Reverse interlock control output
