CB780/CB784 RELAY MODULES
32-00207—01
14
Fig. 9. Wiring the Data ControlBus™ Module with Remote Keyboard Display Module.
ASSEMBLY
Mounting CB780/CB784 Relay
Modules
NOTE:
For installation dimensions, see Fig. 1.
Relay Module Mounting
1.
Mount the CB780/CB784 vertically, see Fig. 11, or
mount horizontally with the knife blade terminals
pointing downward. The CB780/CB784 must be in
an electrical enclosure.
2.
Select the location in the electrical enclosure. Be
sure to allow adequate clearance for servicing,
installation and removal of the CB780/CB784, Key-
board Display Module, flame amplifier, flame ampli-
fier signal voltage probes, electrical signal voltage
probes, and electrical connections.
a. Allow an additional two inches below the
CB780/CB784 for the flame amplifier mounting.
b. Allow an optional three-inch minimum to both
sides of the CB780/CB784 for electrical signal
voltage probes.
3.
Make sure no subbase wiring is projecting beyond
the terminal blocks. Tuck wiring in against the back
of the sub-base so it does not interfere with the knife
blade terminals or bifurcated contacts.
IMPORTANT:
The CB780/CB784 must be installed with a plug-
in motion rather than a hinge action.
4.
Mount the CB780/CB784 by aligning the four L
shaped corner guides and knife blade terminals with
the bifurcated contacts on the wiring subbase and
tightening the two screws securely without deform-
ing the plastic.
Installing the Purge Card
1.
Remove the Keyboard Display Module or DATA
CONTROLBUS MODULE™, see Fig. 13 or 14.
2.
Remove the current Purge Card from the
CB780/CB784 by pulling the plastic support cover
upward.
3.
Make sure that the Purge Card selected has the
desired timing.
4.
Insert Purge Card into the opening of the
CB780/CB784 compartment, see Fig. 12.
1
1
2
2
832-1693
120 OHM
RESISTOR
832-1693
120 OHM
RESISTOR
1
A
B
A
B
C (GND)
+13 VDC
RESET
C (GND)
+13 VDC
RESET
1
2
3
4
5
1
2
3
4
5
MOMENTARY
PUSH BUTTON
SWITCH
833-2729 DATA CONTROLBUS OR 833-2820 MODBUS MODULE™
(MOUNTED ON CB 780/CB 784)
833-2727 REMOTE KEYBOARD DISPLAY MODULE
THREE WIRE SHIELDED CABLE MAY BE REQUIRED. TWO
832-1693 120 OHM TERMINATING RESISTORS ARE REQUIRED
FOR CONNECTIONS OVER 100 FEET. CABLE SHIELD MUST BE
TERMINATED TO EARTH GROUND AT BOTH ENDS. IF SHIELDED
CABLE IS NOT USED, TWISTED PAIR WIRE MUST BE USED.
WHEN CONNECTING THE KEYBOARD DISPLAY MODULE DATA
CONTROLBUS MODULE™, OR REMOTE RESET MODULE
EXTERNAL FROM THE CONTROL CABINET, APPROPRIATE
MEASURES MUST BE TAKEN TO MEET EN60730 SAFETY
LOW VOLTAGE REQURIEMENTS (SEE APPROVALS).
M27260A
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