Owner's manual
65-2405RK-03 Combustible Gas Transmitter • 9
Figure 4: Wiring the Amplifier to a Controller
10. If shielded cable is used, connect the cable’s drain wire to an available chassis (earth) 
ground at the controller. RKI controllers typically have a ground stud that can be used 
to ground the cable’s drain wire.
Amplifier (Transmitter)
Cable Shield
- (DC Ground)
+ 24 VDC
4 - 20 mA In (S)
Controller or 
Recording Device
Detector Wires
Green
White
Red
B
Amplifier 
J-Box
R W G
 PWR / SIG 
Black
 LEL
S










