RKI Instruments 65-2399RK-CH4 User Manual
Page 10
6 • 65-2399RK-CH4 Combustible Gas Transmitter
2.
At the monitoring site you select, hang or mount the junction box with the detector
facing down (see Figure 3).
Wiring the Methane Transmitter to a Controller
WARNING: Always verify that the power to the controller is off before you make
wiring connections.
1.
Turn off the controller.
2.
Turn off or unplug power to the controller.
3.
Remove the junction box cover.
4.
The detector leads are factory wired. Verify that the detector leads are wired to the
amplifier’s detector terminal strip as shown in Figure 4.
5.
To gain access to a plug-in terminal strip for wiring, pull it out of its socket by
grasping the terminal strip and pulling. The socket for the detector strip and the plug
for the controller strip are keyed so that the controller and detector terminal strips
cannot be reversed inadvertently.
6.
Guide a three-conductor, shielded cable, or three wires in conduit through the top
conduit hub of the junction box. Use appropriate conduit fittings and construction
technique for the environmental rating of the junction box. The junction box is rated
NEMA 4X.
7.
Pull out the controller terminal strip, and connect the three wires to the terminal strip
as follows (see Figure 4).
•
Connect the positive wire to the
PWR/SIG “+”
terminal.
•
Connect the signal wire to the
PWR/SIG “
S”
terminal.
•
Connect the negative wire to the
PWR/SIG “-”
terminal.
CAUTION:
If shielded cable is used, leave the cable shield’s drain wire disconnected and
insulated at the transmitter. You will connect the opposite end of the cable’s drain
wire to the controller’s chassis (earth) ground.
8.
Reinstall the controller terminal strip into its socket.
9.
Secure the junction box cover to the junction box.
10. Route the cable or wires leading from the methane transmitter through one of the
conduit hubs at the controller housing. Use appropriate conduit fittings and
construction technique for the environmental rating of the controller. RKI controllers
are typically rated NEMA 4X.
CAUTION:
Do not route power and transmitter wiring through the same controller conduit hub.
The power cable may disrupt the transmission of the transmitter signal to the
controller.
11. Connect the wires to the applicable detector/transmitter terminal strip at the
controller as shown in Figure 4.