Guspro BB-8416884 - Final Wiring Check

RM7895A,B,C,D/EC7895A,C; RM7896A,B,C,D 7800 SERIES RELAY MODULES
66-1090—36
Table 1. Recommended Wire Sizes and Part Numbers.
a
The KDM, Data ControlBus™ Module
(
for remote mountin
g
or communications
)
or Communication Interface ControlBus™
Module must be wired in dais
y
chain confi
g
uration, 1
(
a
)
-1
(
a
)
, 2
(
b
)
-2
(
b
)
, 3
(
c
)
-3
(
c
)
. The order of interconnection of all the devices
listed above is not important. Be aware that modules on the closest and farthest end of the dais
y
chain confi
g
uration strin
g
re
q
uire a 120 ohm
(
1/4 watt minimum
)
resistor termination across terminals 1 and 2 of the electrical connectors for connections
over 100 feet
(
31 meters
)
.
Table 2. Recommended Grounding Practices.
7.
Recommended wire routin
g
of leadwires:
a. Do not run hi
g
h volta
g
e i
g
nition transformer wires
in the same conduit with the flame detector, Data
ControlBus Module™, or Remote Reset Module
wirin
g
.
b. Do not route flame detector, Data ControlBus
Module™, or Remote Reset Module leadwires in
conduit with line volta
g
e circuits.
c. Enclose flame detector leadwires without armor
cable in metal cable or conduit.
d. Follow directions in flame detector, Data ControlBus
Module™, or Remote Reset Module Instructions.
8.
The KDM is powered from a low volta
g
e, ener
gy
limited
source. It can be mounted outside of a control panel if it
is protected from mechanical dama
g
e.
NOTE: A 13 Vdc power suppl
y
must be used an
y
time more
than one KDM is used.
9.
Maximum wire len
g
ths:
a. RM7895A,B,C,D/EC7895A,C; RM7896A,B,C,D
leadwires: The maximum leadwire len
g
th is 300 feet
to terminal inputs
(
Control, Runnin
g
/Lockout
Interlock
)
.
b. Flame Detector leadwires: The maximum flame
sensor leadwire len
g
th is limited b
y
the flame si
g
nal
stren
g
th.
c. Remote Reset leadwires: The maximum len
g
th of
wire is 1000 feet
(
305 meters
)
to a Remote Reset
pushbutton.
d. Data ControlBus Module™: The maximum Data
ControlBus Module™ cable len
g
th depends on the
number of s
y
stem modules connected, the noise
conditions and the cable used. The maximum len
g
th
of all Data ControlBus Module™ interconnectin
g
wire is 4000 feet
(
1219 meters
)
.
10.
Be sure loads do not exceed the terminal ratin
g
s. Refer
to the label on the RM7895A,B,C,D/EC7895A,C;
RM7896A,B,C,D or to the terminal ratin
g
s in Table 3.
Final Wiring Check
1.
Check the power suppl
y
circuit. The volta
g
e and
fre
q
uenc
y
tolerance must match those of the
RM7895A,B,C,D/EC7895A,C; RM7896A,B,C,D. A
separate power suppl
y
circuit can be re
q
uired for the
RM7895A,B,C,D/EC7895A,C; RM7896A,B,C,D. Add
the re
q
uired disconnect means and overload protection.
2.
Check all wirin
g
circuits and complete Static Checkout
in Table 4 before installin
g
the RM7895A,B,C,D/
EC7895A,C; RM7896A,B,C,D on the subbase.
3.
Install all electrical connectors.
4.
Restore power to the panel.
Application Recommended Wire Size Recommended Part Numbers
Line volta
g
e terminals. 14, 16 or 18 AWG copper conductor, 600 volt insulation,
moisture-resistant wire.
TTW60C, THW75C, THHN90C.
Ke
y
board Displa
y
Module 22 AWG two-wire twisted pair with
g
round, or five-wire. Belden 8723 shielded cable or e
q
uivalent.
Data ControlBus™ Module
a
22 AWG two-wire twisted pair with
g
round, or five-wire. Belden 8723 shielded cable or e
q
uivalent.
Remote Reset Module 22 AWG two-wire twisted pair, insulated for low volta
g
e. —
Communications Interface
ControlBus™ Module
a
22 AWG two-wire twisted pair with
g
round. Belden 8723 shielded cable or e
q
uivalent.
13 Vdc full-wave rectified
transformer power input.
18 AWG wire insulated for volta
g
es and temperatures
for
g
iven application.
TTW60C, THW75C, THHN90C.
Ground Type Recommended Practice
Earth
g
round
(
subbase and rela
y
module
)
.
1. Use to provide a connection between the subbase and the control panel of the
e
q
uipment. Earth
g
round must be capable of conductin
g
enou
g
h current to blow the
20A fuse
(
or breaker
)
in the event of an internal short circuit.
2. Use wide straps or brackets to provide minimum len
g
th, maximum surface area
g
round conductors. If a leadwire is re
q
uired, use 14 AWG copper wire.
3. Make sure that mechanicall
y
ti
g
htened
j
oints alon
g
the
g
round path are free of
nonconductive coatin
g
s and protected a
g
ainst corrosionon matin
g
surfaces.
Si
g
nal
g
round
(
Ke
y
board Displa
y
Module, Data ControlBus™ Module,
Communications Interface
ControlBus™ Module.
Use the shield of the si
g
nal wire to
g
round the device to the si
g
nal
g
round terminal 3
(
c
)
of
each device. Connect the shield at both ends of the dais
y
chain to earth
g
round.