Honeywell 7800 Series Manual page 11

Fig. 6—Internal block diagram of the RM7895 (see Figs. 7 and 8 for detailed wiring instructions).
5
RUN/TEST
SWITCH
RESET
PUSHBUTTON
STATUS LEDs
LIMITS CONTROLLER
OPTIONAL KEYBOARD
DISPLAY MODULE
DDL
DDL
COMMUNICATIONS
1 PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.
L1
(HOT)
1
CONFIGURATION
JUMPERS
MICROCOMPUTER
2K
3K
RELAY
4K
DRIVE
CIRCUIT
5K
6K
7K
SAFETY RELAY
1K
CIRCUIT
AIRFLOW
INTERLOCK
6 7
6K1
3K1
RS485
1
2
3
REMOTE
RESET
11
L2
120 Vac
PLUG-IN PURGE
TIMER CARD
FLAME SIGNAL
PLUG-IN
FLAME
AMPLIFIER
TEST
RELAY
STATUS
FEEDBACK
AND LINE
VOLTAGE
INPUTS
CONTROL
POWER SUPPLY
POWER
1K1
2K1 5K1
10
4K1
8
7K1
21
2K2
9
4
3
INDICATES FEEDBACK SENSING
TO RELAY STATUS FEEDBACK
AND LINE VOLT INPUTS
FIELD WIRING
INTERNAL WIRING
RM7895A,B,C,D
INSTALLATION
L2
TEST
JACK
F
G
22
IGNITION
PILOT
DELAYED
MAIN VALVE
MAIN VALVE
BLOWER
ALARM
M5110B
65-0086—2