Trane Tracer AH540 User Manual

Chapter 3 Input and Outputs
16 CNT-SVX05B-EN
Figure 8. Binary output wiring schematic
Each binary output has a green status LED on the Tracer
AH540/541 con-
troller board (see Figure 1 on page 4). The LED is off when the relay con-
tacts 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 0 Vac across the output terminals. When the binary out-
put relay is On (contacts are closed), a multimeter should measure 24 Vac
across the output terminals.
Analog outputs
The Tracer AH540/541 controller has five analog outputs that are
assigned to the specific functions shown in Table 4
Termination board
24 Vac
GND
GND
BO1
Supply fan
start/stop relay
Wiring external to the
termination board
Table 4. Analog output functions and locations
AH540 AH541
Function
Output range
default value
1
Maximum
output
rating
Output
label
Terminal label
Factory
terminal
label
Field
terminal
label
AO1 TB11/1 OUT
TB11/2 GND
J11 AO1 Supply fan speed 0 to 10 Vdc
ground
20 mA
AO2 TB12/1 OUT
TB12/2 GND
J12 AO2 Cool valve output or
two-pipe changeover
2 to 10 Vdc
ground
20 mA
AO3 TB13/1 OUT
TB13/2 GND
J13 AO3 Heat output (water, steam, or
electric heat sequencer)
2 to 10 Vdc
ground
20 mA
AO4 TB14/1 OUT
TB14/2 GND
J14 AO4 Face-and-bypass damper 2 to 10 Vdc
ground
20 mA
AO5 TB15/1 OUT
TB15/2 GND
J15 AO5 Outdoor air damper 2 to 10 Vdc
ground
20 mA
AO6 TB16/1
TB16/2
J16 AO6 Not used — —
1 Each analog output can be configured for 0–10 Vdc or 2–10 Vdc operation, and normally open or normally closed.

Trane Tracer AH540 Specifications

General

Brand	Trane
Model	Tracer AH540
Category	Controller
Language	English