CB780E/CB784E RELAY MODULES WITH VALVE PROVING
32-00150—03
10
750-234
removal of the CB780E/CB784E, Expanded Annun-
ciator, Keyboard Display Module, flame amplifier,
flame amplifier signal voltage probes, Run/Test
Switch, electrical signal voltage probes and electri-
cal field connections.
3.
For surface mounting, use the back of the subbase
as a template to mark the four screw locations. Drill
the pilot holes.
4.
Securely mount the subbase using four no. 6 screws.
WIRING
1.
Proper Wiring:
a. For proper subbase wiring, refer to
b. For proper remote wiring of the Keyboard Display
Module, refer to Fig. 11 or Fig. 12 to the Specifi-
cations for the Keyboard Display Module, Com-
munication Interface Base Unit or DATA
CONTROLBUS MODULE™.
2.
Disconnect the power supply from the main discon-
nect before beginning installation to prevent electri-
cal shock and equipment damage. More than one
disconnect may be involved.
3.
All wiring must comply with all applicable electrical
codes, ordinances and regulations. Wiring, where
required, must comply with NEC, Class 1 (Line Volt-
age) wiring.
4.
Recommended wire size and type:
a. All Line Voltage terminals use no. 14 or 16 cop-
per conductor (90°C or higher) 600 volt insula-
tion wire size must be coordinated with fuse
protection). For high temperature installations,
use wire selected for a temperature rating above
the maximum operating temperature. All lead-
wires should be moisture resistant.
WARNING
Keyboard Display Module and/or Data Controlbus
Module is powered from internally fused low
voltage source and shares the voltage supply with
Relay Module. The fuse is non-replaceable.
Excessive current draw or short at display
connection may cause fuse to blow out resulting in
dead, unpowered system.
WARNING
b. Keyboard Display Module—For communications
purposes, use an unshielded 22 AWG 2-wire
twisted cable and one wire for ground if the lead-
wire run and noise conditions permit; however,
some installations may need up to five wires,
three for communications and two for remote
reset (in either a single cable or separate cables
for communications or remote reset) or use
Belden 8771 shielded cable or equivalent. The
Keyboard Display Module, DATA CONTROLBUS
MODULE™ (for remote mounting or communica-
tions) or Communication Interface ControlBus
Module must be wired in a daisy chain configu-
ration, (1(a)-1(a), 2(b)-2(b), 3(c)-3(c)). The order
of interconnection of all the devices listed above
is not important. Be aware that modules on the
closest and farthest end of the daisy chain con-
figuration string require a 120 ohm (1/4 watt
minimum) resistor termination across terminals
1 and 2 of the electrical connectors, for connec-
tions over 100 feet, see Fig. 11–13.
c. DATA CONTROLBUS MODULE™—For communi-
cations purposes, use an unshielded 22 AWG 2-
wire twisted cable if the leadwire run and noise
conditions permit; however, some installations
may need up to five wires, three for communica-
tions and two for remote reset (in either a single
cable or separate cables) or use a Belden 8771
shielded cable or equivalent. The Keyboard Dis-
play Module, DATA CONTROLBUS MODULE™
(for remote mounting or communications) or
Communication Interface ControlBus Module
must be wired in a daisy chain configuration,
(1(a)-1(a), 2(b)-2(b),
3(c)-3(c)). The order of interconnection of all the
devices listed above is not important. Be aware
that modules on the closest and farthest end of
the daisy chain configuration string require a
120 ohm (1/4 watt minimum) resistor termina-
tion across terminals 1 and 2 of electrical con-
nectors, for connections over 100 feet, see Fig.
11–13.
