Instruction Manual
D200160X012
4195K Controllers
July 2018
41
External Feedback Operation
External feedback is available for all 4195KB controllers. Controllers with this option have an external connection on
the bottom of the controller case as shown in figure 2‐5. This connection breaks the positive feedback (reset) loop
inside the controller and brings it outside as shown in figure 4‐9. The connection allows the positive feedback loops of
two controllers (primary and secondary) to be tied together when the controllers are used in an override application.
When connected, the secondary controller tracks the primary controller, minimizing reset windup.
Figure 4‐9. Schematic of External Feedback Option
47A0975-A
A3342‐1
TO
RESET
BELLOWS
TO
NOZZLE
OUTPUT
RELAY
SUPPLY
PRESSURE
EXTERNAL FEEDBACK TO OUTPUT
OF HIGH OR LOW SELECT RELAY
TO PROPORTIONAL
BELLOWS
RESET
VALVE
SUPPLY PRESSURE
OUTPUT PRESSURE
NOZZLE PRESSURE
RESET PRESSURE
SELECT RELAY OUTPUT