ProFire PF2200-SB Product Manual page 20

2.1.2.16 AUXILIARY INPUTS
The Auxiliary Inputs 1 and 2 (terminals 45-46 and terminals 47-48 respectively) are intended to be
connected to a generic I/O device that does not fit into any of the above categories of inputs.
Configurable as either a digital or 4-20mA input, this input is intended to be connected to either a
switch/PLC output (digital) or transmitter (4-20mA).
The following table outlines the modes/behavior of the Auxiliary Input:
Input Configuration
Disabled
Digital Input
4-20mA
Appliance Firing Rate
In addition to the features mentioned above, Auxiliary Input 1 has the ability to map to the appliance
firing rate. This input maps directly to the TCV output position (e.g. 4mA = 0%, 20mA = 100%). This is,
however, gated by the TCV minimum opening position. The TCV output position can only be set by
appliance firing rate during the process control state, in any other state it abides by the rules outlined in
the TCV section of this document.
When this mode is enabled, the process setpoint is ignored by the system and instead the TCV is
actuated based on the 4-20mA input.
If this input goes invalid or out of range the appliance firing rate will be set to 0% and an alarm will be
set to shut the system down.
Event
Any
De-energized (input mode set to Alarm)
De-energized (input mode set to Wait)
De-energized (input mode set to Warning)
De-energized (input mode set to Main Permissive)
Energized
Out of range
Low/High Trip (input mode set to Alarm)
Low/High Trip (input mode set to Wait)
Low/High Trip (input mode set to Warning)
Low/High Trip (input mode set to Main Permissive)
Active range
Section 2: PF2200-SB PRODUCT DESCRIPTION
V 4.0
System Behavior
No Effect
Alarm
Wait
Warning
Main Permissive
Run
Alarm
Alarm
Wait
Warning
Main Permissive
Run
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