Detcon FP-524D-HRT - Manual (Page 43)

Model FP-524D-HRT
FP-524D-HRT Instruction Manual Rev. 0.1 Page 39 of 48
Replacement of the Connector PCB
NOTE: It is necessary to remove power to the junction box while changing the connector PCB
in order to maintain area classification.
a) Remove the junction box cover and remove the transmitter module from the connector PCB.
b) Remove the black, white, blue, and yellow wires coming from the combustible gas sensor from the
connector PCB.
c) Remove the output wiring from the connector PCB terminals labeled DC+, DC-, and MA.
d) Remove the two 6-32 screws holding the Connector PCB to the base of the junction box, and remove the
connector PCB.
e) Install the new connector PCB using the two 6-32 screws removed in step d).
f) Re-connect the output wiring to the terminals labeled DC+, DC-, and MA on the connector PCB,
g) Reconnect the black, white, blue, and yellow wires from the combustible gas sensor to the connector PCB.
h) Reinstall the transmitter module, and the junction box cover.