Siemens Industry, Inc.
Building Technologies Division
P/N 315-034200-9
4
WIRING
Remove all system power before installation, first battery, then AC. (To power up,
connect the AC first, then the battery.)
All device field wiring to the CDC-4 is connected to the terminal blocks of the CC-5
card cage slot in which it is installed.
To Connect the External Wiring:
1.
Loosen the screw of the
terminal by turning it counter-
clockwise.
2.
Insert the wire into the side of
the terminal block
3.
Tighten the screw of the
terminal block by turning it
clockwise.
C24V from PSC-12 to terminal
17 and -24V from PSC-12 to terminal 18
of the slot in the CC-5 where the CDC
will be installed using 12-18 AWG (Refer
to Fig.2).
Refer to Figure 3. All circuits are power
limited to NFPA 70 per NEC 760. Each
detector or group of detectors must use
a two-wire circuit of at least 18 AWG,
thermoplastic fixture wire, enclosed in
conduit. If permitted by local building
codes, 18 AWG limited energy, shielded
cable without conduit may also be used.
The CDC-4 may be connected to existing
device loops that have a 3.9K or 4.7K
end-of-line resistor (
1
/
4
W, 5%) or a 50uF,
50V end-of-line capacitor installed. Always use a 50uF, 50V end-of-line capacitor for
new installations and whenever practical in existing detector loops for all detector
models except the Siemens PBA-1191, which requires a 4.7K end-of-line resistor, as
shown in Figure 3.
Total circuit resistance must not exceed 70 ohms—40 ohms if accessories (relay/
audible bases) are used.
Each detector zone can be wired Class A or Class B individually.
The screw terminals can accommodate one 12 -18 AWG or two 16-18 AWG.
All unused zones must be terminated with a 50uF capacitor (Terminals 1 and 4 for
Zone 1, Terminals 5 and 8 for Zone 2, Terminals 9 and 12 for Zone 3, and Terminals 13
and 16 for Zone 4).
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
LINE+
(OUT)
LINE+
(OUT)
LINE+
(OUT)
LINE+
(OUT)
LINE-
(OUT)
LINE-
(OUT)
LINE-
(OUT)
LINE-
(OUT)
LINE-
(RETURN)
LINE-
(RETURN)
LINE-
(RETURN)
LINE-
(RETURN)
LINE+
(RETURN)
LINE+
(RETURN)
LINE+
(RETURN)
LINE+
(RETURN)
24V+
24V–
ZONE 1
ZONE 3
TO 24VDC FROM PSC-12
ZONE 2
ZONE 4
ONE SLOT OF CC-5 FOR CDC-4
17
18
19
20
21
22
23
24
Figure 2
Wiring 24V Power Lines
