Binary Outputs - Trane Tracer AH.540 Installation Owner Diagnostics

CNT-SVX05A-EN
Physical specifications

Binary outputs

The binary outputs are normally-open, form A relays. The relays act as a switch,
either making or breaking the circuit between the load (device) and 24VAC. When
binary output 1 is energized, 24VAC is supplied to terminal TB21-1 (OUT),
energizing the supply fan start/stop relay.
Example:
24VAC Termination board
TB21-1 (OUT)
TB21-2 (GND)
GND
Each binary output has a green status LED on the Tracer AH.540 control board.
The LED is off when the relay contacts are open. The LED is on when the relay
contacts are closed.
When the binary output relay is off (contact is open), a multimeter should
measure 0VAC across the output terminals. When the binary output relay is on
(contacts are closed), a multimeter should measure 24VAC across the output
terminals.
Table 2 — Binary outputs
Description Function Factory
Terminals
BO 1 Supply fan J21
start/stop
BO 2 Exhaust fan J22
start/stop
BO 3 Not used J23
(Note 1)
BO 4 Not used J24
(Note 1)
BO 5 Not used J25
(Note 1)
BO 6 Not used J26
(Note 1)
Note 1: Terminals BO 3, BO 4, BO 5, and BO 6 do not serve any function of the Tracer AH.540 controller and are not used.
Wiring external to the
Termination board
Supply Fan (start/stop)
BO 1
Relay
Field Label Terminal
Terminals Function
TB21-1 OUT 24VAC
TB21-2 GND Ground
TB22-1 OUT 24VAC
TB22-2 GND Ground
TB23-1 OUT Not used
TB23-2 GND
TB24-1 OUT Not used
TB24-2 GND
TB25-1 OUT Not used
TB25-2 GND
TB26-1 OUT Not used
TB26-2 GND
Maximum
Output Rating
24VA
24VA
Not used
Not used
Not used
Not used
7