Honeywell 7800 Series Manual page 15

S7800 KEYBOARD DISPLAY MODULE
(MOUNTED ON 7800 SERIES RELAY MODULE)
1 2 3 4 5
120 OHM
RESISTOR 2
1
120 OHM
RESISTOR
1
2 3 4 5
1
S7800 REMOTE KEYBOARD DISPLAY MODULE
1
THREE WIRE SHIELDED CABLE MAY BE REQUIRED. TWO
120 OHM TERMINATING RESISTORS ARE REQUIRED FOR
CONNECTING OVER 100 FEET [30 METERS]. CABLE SHIELD
MUST BE TERMINATED TO EARTH GROUND AT BOTH ENDS.
IF SHIELDED CABLE IS NOT USED, TWISTED PAIR WIRE
MUST BE USED.
2
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 REQUIREMENTS (SEE APPROVALS).
Fig. 5. Wiring multiple Keyboard Display Modules.
S7810 DATA CONTROLBUS MODULE™
(MOUNTED ON 7800 SERIES RELAY MODULE)
1 4
2 3
120 OHM
2
RESISTOR
1
120 OHM
RESISTOR
1
1 2 3 4
S7800 REMOTE KEYBOARD DISPLAY MODULE
THREE WIRE SHIELDED CABLE MAY BE REQUIRED. TWO 120
1
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
2
CONTROLBUS MODULE™, OR REMOTE RESET MODULE
EXTERNAL FROM THE CONTROL CABINET, APPROPRIATE
MEASURES MUST BE TAKEN TO MEET EN60730 SAFETY
LOW VOLTAGE REQUIREMENTS (SEE APPROVALS).
Fig. 6. Wiring the DATA CONTROLBUS MODULE™
with remote Keyboard Display Module.
MOMENTARY
PUSHBUTTON
SWITCH
13 Vdc
POWER SUPPLY
L2
L1
(HOT)
2
M5006E
MOMENTARY
PUSHBUTTON
SWITCH
5
5
M1987C
15
7800 SERIES RM7830A, RM7850A RELAY MODULE
Mounting Relay Module
NOTE: For installation dimensions, see Fig. 1 .
Relay Module Mounting
Mount the Relay Module vertically, see Fig. 7, or mount
horizontally with the knife blade terminals pointing
downward. The Relay Module must be in an electrical
enclosure.
Select the location in the electrical enclosure. Be sure
to allow adequate clearance for servicing, installation
and removal of the Relay Module, Keyboard Display
Module, flame amplifier, flame amplifier signal voltage
probes, electrical signal voltage probes, and electrical
connections.
a. Allow an additional 50 mm below the Relay
Module for the flame amplifier mounting.
b. Allow an optional 75 mm minimum to both sides
of the Relay Module for electrical signal voltage
probes.
Make sure no subbase wiring is projecting beyond the
terminal blocks. Tuck wiring in against the back of the
subbase so it does not interfere with the knife blade
terminals or bifurcated contacts.
IMPORTANT
The Relay Module must be installed with a plug-in
motion rather than a hinge action.
Mount the Relay Module 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 deforming
the plastic.
Installing ST7800A Purge Card
Remove the Keyboard Display Module, DATA
CONTROLBUS MODULE™ Extension Cable
Assembly, or Dust Cover, see Fig. 8.
Remove the current ST7800 from the Relay Module by
pulling upward the plastic support cover.
Make sure that the ST7800 selected has the desired
timing.
Insert the Purge Card into the opening of the Relay
Module compartment, see Fig. 8.
Reinstall the Keyboard Display Module or DATA
CONTROLBUS MODULE™ onto the Relay Module
and restore power to the device.
Run the burner system through at least one complete
cycle to verify the system is operating as desired.
Mounting Keyboard Display Module
Align the two interlocking ears of the Keyboard Display
Module with the two mating slots on the Relay Module,
see Fig. 9.
Insert the two interlocking ears into the two mating slots
and with a hinge action push on the lower corners of
the Keyboard Display Module to secure it to the Relay
Module.
Verify the Keyboard Display Module is firmly in place.
65-0222