Trane ReliaTel Diagnostic Manual page 16

Module Flow Diagram
RTEM
Figure 6. Economizer Module (RTEM)
DCV Mode
Refrigeration
Module
24 VAC
16
ReliaTel Economizer Module
ModBus Communication
24 VAC
DCV Min Pos 0-40/50%
Design Min Pos 0-10/50%
C
B
A
D
E
DCV Setpoint LL
300-1900 ppm
(RTRM v8.0 & later)
DCV Setpoint UL
500-1500 ppm (pre-RTRM
v8.0)
1000-2000 ppm (RTRM
v8.0 & later)
MA Sensor
Mixed Air Temp (AIP)
10K 25C Neg Coeff
RH Sensor Return Air Relative Humidity (AIP)
4-20 mA Pos Coeff
RA Sensor Return Air Temp (AIP)
10K 25C Neg Coeff
Outdoor Air Relative Humidity (AIP)
RH Sensor
4-20 mA Pos Coeff
C0 2 Sensor IAQ Sensor (C0 2 ) (AIP)
0-10 VDC
Potentiometer
Remote Minimum Position Pot. (AIP)
0-270 Ohm
Power Exhaust
Status LED
Enthalpy/Temperature
Setpoint Pot.
PWR
EXH
relay
24 VAC
RT-SVD03G-EN