Honeywell 7800 Series Manual page 12

7800 SERIES RM7830A, RM7850A RELAY MODULE
4
RUN/TEST
SWITCH
RESET
PUSHBUTTON
STATUS
LEDS
3K2
2
DDL
DDL
COMMUNICATIONS
1
PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION
AS REQUIRED.
2 TO CONNECT L1 DIRECTLY TO LOS, AT LEAST ONE CONTROLLED
SHUTDOWN MUST BE PROVIDED EVERY 24 HOURS.
65-0222
CONFIGURATION
JUMPERS
MICROCOMPUTER
RELAY
DRIVE
CIRCUIT
SAFETY RELAY
CIRCUIT
ES1
18
ES3
19
ES2
17
16
LOS RT
20
LD2
7
6K1
3K1
KEYBOARD
DISPLAY MODULE
8K1
RS485
8K2
5
1
2
REMOTE
9K2
3 RESET
Fig. 3B. Internal block diagram of the RM7850A.
L1
HOT N
1
120 Vac
PLUG-IN PURGE
TIMER CARD
FLAME SIGNAL
PLUG-IN
FLAME
AMPLIFIER
2K
3K
4K
5K
RELAY
6K
STATUS
7K
FEEDBACK
AND LINE
8K
VOLTAGE
9K
INPUTS
1K
CONTROL
POWER SUPPLY
POWER
2K1 5K1
6
10
4K1
1K1
8
7K1
21
2K2
9
5
3
HIGH FIRE
12
INDICATES FEEDBACK SENSING
OF RELAY CONTACT STATUS
COMMON
13
AND LINE VOLTAGE INPUTS
LOW FIRE
F G ... 22
15
MODULATE
RELAY CONTACT OPEN
14
RELAY CONTACT CLOSED
RELAY COIL
FIELD WIRING
INTERNAL WIRING
12
2
TEST
JACK
F
G
SHUTTER
22
AL
IGN
PV1
PV2
MV
FAN
AL
USER TERMINALS
M10179