Trane Tracer MP503 - Outputs; Wiring Requirements and Options

12 CNT-SVX09E-EN
Applications for the MP503
Outputs
The binary outputs are Form A single-pole, single-throw (SPST) relay outputs. These relays switch
24 Vac and
are not dry contacts.
Important:

A pilot relay is required for any application requiring dry contacts. Relays connected
to the binary outputs on the module cannot exceed 12 VA or 0.5 A current draw at
24 Vac.
Wiring Requirements and Options
Figure 5 shows the wiring of each type of input on the MP503 and the wiring for a typical binary
output.
Figure 5. Input/output terminal wiring for the MP503
H
Typical relay on/off
Not
used
In
LonTalk 
communication link
Out
24 Vac
N
Typical relay on/off
Typical relay on/off
Typical relay on/off
–
+
–
+
GND
Typical
thermistor
sensor
Typical 2-wire 4–
20 mA sensor
Typical 3-wire
0–10 Vdc sensor
Typical
binary
switching
device
Typical relay on/off