Honeywell 7800 Series Installation Instructions Manual page 4

RM7845A 7800 SERIES RELAY MODULES
4
RESET
PUSHBUTTON
STATUS LEDs
LIMITS CONTROLLER
DDL
DDL
COMMUNICATIONS
1 PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.
Fig. 1. Internal block diagram of the RM7845A (See Fig. 2 for individual detailed wiring instructions).
661147—1
CONFIGURATION
JUMPERS
RUN/TEST
SWITCH
MICROCOMPUTER
SAFETY RELAY
CIRCUIT
20
PRE-IGNITION
INTERLOCK
RUNNING/
LOCKOUT
INTERLOCK
6
LOW FIRE SWITCH
18
HIGH FIRE SWITCH
19
6K1
3K1
KEYBOARD
DISPLAY MODULE
RS485
1
2
REMOTE
3
RESET
L1
(HOT) L2
1
120 Vac,
50/60 Hz
PLUG-IN PURGE
TIMER CARD
FLAME SIGNAL
PLUG-IN
FLAME
AMPLIFIER
TEST
2K
3K
4K
RELAY
5K
DRIVE
CIRCUIT 6K
7K
8K
9K
1K
POWER SUPPLY
1K1 4K1
7
2K2
HIGH FIRE
12
8K1
COMMON
13
8K2
MODULATE
15
9K1
9K2
LOW FIRE
14
4
L2
TEST
JACK
F
G
RELAY
STATUS
FEEDBACK
AND LINE
VOLTAGE
INPUTS
CONTROL
POWER
IGN/PILOT
8
9
MAIN VALVE
5
BLOWER
3 ALARM
INDICATES FEEDBACK SENSING
OF RELAY CONTACT STATUS
AND LINE VOLT INPUTS
FIELD WIRING
INTERNAL WIRING
M22193