EC7823A;RM7823A 7800 SERIES RELAY MODULES
3
66-1086—2
Fig. 1. Internal block diagram of the EC/RM7823A (See Fig. 6 for detailed wiring instructions).
Table 1. Recommended wire sizes and part numbers.
Table 2. Recommended grounding practices.
Application
Recommended Wire Size
Recommended Part Numbers
Line voltage terminals
14, 16 or 18 AWG copper conductor, 600 volt insulation,
moisture-resistant wire.
TTW60C, THW75C, THHN90C.
Keyboard Display Module 22 AWG two-wire twisted pair with ground, or five wire. Belden
®
8723 shielded cable or equivalent.
Data ControlBus Module™ 22 AWG two-wire twisted pair with ground, or five wire. Belden
®
8723 shielded cable or equivalent.
Remote Reset Module
22 AWG two-wire twisted pair, insulated for low voltage. —
Communications Interface
ControlBus Module
22 AWG two-wire twisted pair with ground.
Belden
®
8723 shielded cable or equivalent.
13 Vdc full-wave rectified
transformer power input.
18 AWG wire insulated for voltages and temperatures
for given application.
TTW60C, THW75C, THHN90C.
Ground Type
Recommended Practice
Earth ground
(subbase and
relay module).
1. Use to provide a connection between the subbase and the control panel of the equipment. Earth ground
must be capable of conducting enough current to blow the 15A fast acting fuse (or breaker) in the event of an
internal short circuit.
2. Use wide straps or brackets to provide minimum length, maximum surface area ground conductors. If a
leadwire must be used, use 14 AWG copper wire.
3. Make sure that mechanically tightened joints along the ground path are free of nonconductive coatings and
protected against corrosion on mating surfaces.
MICROCOMPUTER
RESET
PUSHBUTTON
STATUS
LEDs
POWER SUPPLY
PLUG-IN
FLAME
AMPLIFIER
RELAY
DRIVE
CIRCUIT
CONTROL
POWER
TEST
JACK
FIELD WIRING
INTERNAL WIRING
NC
COMMON
NO
NC
A1
120 Vac/220-240 Vac,
50/60 Hz
FLAME SIGNAL
TEST
PROVIDE DISCONNECT MEANS AND
OVERLOAD PROTECTION AS REQUIRED.
OUTPUTS SHOWN ARE WHEN THE
DEVICE DOES NOT SENSE FLAME.
L1
(HOT)
L2
3
A2
B1
10
8
9
14
F
G
22
1
COMMON
13
NO
15
L2
OPTIONAL KEYBOARD
DISPLAY MODULE
REMOTE
RESET
DDL
DDL
COMMUNICATIONS
RS485
1
2
3
5
1
M15079A
9K
B2
9K
2
2