Binary Inputs - Trane Tracer AH.540 Installation Owner Diagnostics

CNT-SVX05A-EN

Binary inputs

The default configuration for each binary input (including normally open/closed)
of the Tracer™ AH.540 is set at the factory. For field-installed AH.541 controllers,
the configuration of the binary inputs must be set with Trane Rover
software.
Configure any binary input not in use (an input to which no device is physically
connected) as Not Used.
The Tracer AH.540 controller has six available binary inputs. The binary inputs
are connected to the Tracer AH.540 terminal board on inputs IN 7 through IN 12.
Normally these inputs are factory-configured for the following functions.
Binary inputs
• IN 7: Low temperature detection (freezestat)
• IN 8: Run/stop
• IN 9: Occupancy or generic
• IN 10: Supply fan status
• IN 11: Filter status
• IN 12: Exhaust fan status
Configure IN 9 either as Occupancy or as a Generic binary input. When
configured as a generic binary input, IN 9 does not affect controller operation.
Table 8 — Table Binary input controller operation
Binary Description Configuration
input
IN 7 Low temp detect Normally closed Normal
(Note 1)
IN 8 Run/stop Normally open
(Note 1)
IN 9 Occupancy Normally open
IN 10 Supply fan status Normally open
(Note 1)
IN 11 Filter status Normally open
IN 12 Exhaust fan status Normally closed Exhaust fan
Note 1: During low temp detect, run/stop, and supply fan status diagnostics, the controller disables all normal unit
operation of the fans, valves, and dampers.
Note 2: The table below shows the controller's response to low temp detect, run/stop, supply fan status, and exhaust
fan status latching diagnostics.
Table 9 — Control response to binary input latching diagnostics
Binary Latching Supply
input diagnostic fan
IN 7 Low temp detect Off
IN 8 Run/stop Off
IN 10 Supply fan status Off
IN 12 Exhaust fan status Normal
Operation
Note 1: When steam is the source of heat, the heat output is cycled open and closed when the controller is shut down
on a Low Temp Detect latching diagnostic. See Steam valve cycling in the Sequence of operation section for further
details.
Contact closed
Latching diagnostic
(Note 2)
Unoccupied
Normal
Dirty
diagnostic (Note 2)
Cool Face and Heat
output bypass output
damper
Open Face Open
(Note 1)
Closed Bypass Closed
Closed Bypass Closed
Normal Normal Normal
Operation Operation Operation
™
service
Contact open
Latching diagnostic
(Note 2)
Normal
Occupied
Latching diagnostic
(Note 2)
Clean
Normal
Outdoor air Exhaust
damper fan
Closed Off
Closed Off
Closed Off
Normal Off
Operation
11