PAGE 2 OF 4
WIRING
Disconnect BATTERY and AC prior to working on equipment.
Electrical Connections
After you have set the 8705 address, connect the field wiring. There are three basic connections to the 8705:
initiating devices, addressable device circuit, and 24 VDC power. All terminals are power limited.
Initiating Devices (See Figures 2 and 3)
The 8705 supports one zone of initiating devices in either Class A or Class B. The initiating devices are connected to
terminals 5–8 on the 8705 terminal block. The 8705 is a polarity insensitive module and terminals 1 and 2 can be
connected to either line of the addressable device circuit. Figure 2 shows the Class A wiring. Figure 3 shows the
Class B wiring.
24 VDC Power
The 8705 receives its power from the 24 VDC power output on the control unit or auxiliary power supply that must be
power limited and UL listed for Fire Protective Signaling use. The 24 VDC power may be wired only as Class B.
Since the 8705 monitors the power at its screw terminals, an End of Line Relay is not required for supervision.
ELECTRICAL RATINGS
1
2
3
4
5
6
7
8
9
+
-
-
+
+
-
-
+
+
-
-
+
From the addressable device
circuit of a compatible control
unit or previous addressable
device
-
-
-
+
+
+
Ground (See notes 4 and 5)
End of Line
Resistor
3.6K, 1/4W
P/N 140-820185
To the next addressable
device
From the auxiliary power
supply output of the control
unit or an external 24VDC
power supply that must be
power limited and UL Listed
for Fire Protective Signaling
use.
Addressable Device Circuit
Initiating Device Circuit
Supervised (See note 3)
Line 1
Line 2
Line 1
Line 2
Figure 2
8705 Initiating Devices Wiring Diagram
Style D (Class A) Installation
Figure 3
8705 Initiating Devices Wiring Diagram
Style B (Class B) Installation
1
2
3
4
5
6
7
8
9
+
-
-
+
+
-
-
+
+
-
-
+
-
-
+
+
End of Line
Resistor
3.6K, 1/4W
P/N 140-820185
From the addressable device
circuit of a compatible control
unit or previous addressable
device
To the next addressable
device
From the auxiliary power
supply output of the control
unit or an external 24VDC
power supply that must be
power limited and UL Listed
for Fire Protective Signaling
use.
Addressable Device Circuit
Not Used
Line 1
Line 2
Line 1
Line 2
Ground (See notes 4 and 5)
Initiating Device Circuit
Supervised (See note 3)
NOTES:
1. All circuits are power limited.
2. See NFPA 72 Standard for the number of normally open contact devies allowed. See
UL Compatible Two-Wire Smoke and Heat Detectors for the list of compatible
devices.
3. Initiating Device Circuit cable requirements: Wire size 18 to 14 AWG
4. If Earth Ground is available, the green wire should be connected to earth ground.
5. If Earth Ground is NOT available, the IDC wiring should be limited to the same room.
6. The 8705 draws 1mA from the addressable device circuit.
:
e
n
o
Z
e
c
i
v
e
D
g
n
i
t
a
i
t
i
n
I
e
c
n
a
t
s
i
s
e
R
e
n
o
Z
.
x
a
M
l
a
t
o
T
s
m
h
o
5
3
e
g
n
a
R
e
g
a
t
l
o
V
y
r
o
s
i
v
r
e
p
u
S
C
D
V
5
.
4
2
-
8
1
t
n
e
r
r
u
C
e
n
o
Z
.
x
a
M
A
m
4
3
r
e
w
o
P
C
D
V
4
2
e
g
n
a
R
e
g
a
t
l
o
V
C
D
V
2
.
8
2
-
8
.
8
1
t
n
e
r
r
u
C
.
x
a
M
A
m
0
0
1
Содержание 8705
Страница 4: ...PAGE 4 OF 4 P N 315 034850FA 7 ...
