7.1
16
95-8242
Up to 16 detectors in 8 separate zones can be connected
to the controller. Terminals A, B, and D on the detectors
must connect to the appropriate A, B, and D terminals
at the controller. Connect terminal C on the detector as
well as the shields to power supply negative (terminal
2) at the controller.
Do not
connect the shields to the
detectors. Insulate the shields to prevent shorting to the
device housing or to any other conductor. Connect a
non-polarized 0.47 microfarad 250 vdc capacitor from
terminal 64 (chassis ground) to terminal 2. This places
the controller chassis and the power supply negative at
the same ac potential, minimizing the induction of noise
into the system through the detector wiring.
NOTE
External equipment that can generate transients
when switching (such as relays)
must have a
transient suppression device
(diode) connected
across the coil at the time of installation. This will
safeguard the output transistors of the controller
against possible damage. Figure 21 illustrates
an inductive load with a diode used for transient
suppression.
SWITCH 1 DETECTOR 1
SWITCH 4 TIME DELAY
SWITCH 4
LATCHING/NON-LATCHING
ROCKER
OPEN CLOSED
ROCKER
OPEN CLOSED
ROCKER
OPEN CLOSED
8
7
6
5
4
3
2
1
1
8
7
6 (8 SEC)
5 (4 SEC)
4 (2 SEC)
3 (1 SEC)
2 (.5 SEC)
8
7
6
5
4
3
2
1
8
7
6
5
4
3
2
1
8
7
6
5
4
3
2
1
8
7
6
5
4
3
2
1
OPEN SWITCH FOR EACH
DETECTOR CONNECTED
NOT USED
OPEN
OPEN
OPEN
OPEN
A0278
SWITCH 2 DETECTOR 2
ROCKER
OPEN CLOSED
8
7
6
5
4
3
2
1
SWITCH 3 FIRE LOGIC
ROCKER
OPEN CLOSED
8
7
6
5
SWITCH 3 SENSITIVITY
ROCKER
OPEN CLOSED
4
3
2
1
THE POSITION OF ROCKER
NO. 8 DIVIDES THE SYSTEM
INTO TWO GROUPS OF FOUR
OR ONE GROUP OF EIGHT
SENSITIVITY COUNT
SELECTED WHEN ROCKER
IS IN "CLOSED" POSITION
{
{
NOT USED
SWITCHES CLOSED
ARE ADDITIVE
LATCHING – OPEN
NON-LATCHING – CLOSED
R7404 SIDE VIEW
Figure 19—System Layout Chart
100K
R7484
OPEN COLLECTOR OUTPUT
1N4004
TYPICAL
+60 VDC MAXIMUM
C1289
Figure 21—Transient Suppression Device
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
+
–
(A) +290 VDC
B - INPUT 1
B - INPUT 2
B - INPUT 3
B - INPUT 4
B - INPUT 5
B - INPUT 6
B - INPUT 7
B - INPUT 8
D1-1
oi
DRIVER
D1-2
oi
DRIVER
D1-3
oi
DRIVER
D1-4
oi
DRIVER
D1-5
oi
DRIVER
D1-6
oi
DRIVER
D1-7
oi
DRIVER
D1-8
oi
DRIVER
D2-1
oi
DRIVER
D2-2
oi
DRIVER
D2-3
oi
DRIVER
D2-4
oi
DRIVER
D2-5
oi
DRIVER
D2-6
oi
DRIVER
D2-7
oi
DRIVER
D2-8
oi
DRIVER
DMA OUT AVAILABLE
DMA OUT
DMA IN
DATA STROBE
DMA IN AVAILABLE
ZONE OUTPUT 1
ZONE OUTPUT 2
ZONE OUTPUT 3
ZONE OUTPUT 4
ZONE OUTPUT 5
ZONE OUTPUT 6
ZONE OUTPUT 7
ZONE OUTPUT 8
FIRE LOGIC “A”
FIRE LOGIC “B”
ALARM OUTPUT
EXTERNAL RESET/INHIBIT
OUTPUTS INHIBITED
FAULT OUTPUT
EXTERNAL ACCEPT
STATUS & DET. OUTPUT S1
STATUS & DET. OUTPUT S2
STATUS & DET. OUTPUT S3
STATUS & DET. OUTPUT S4
STATUS & DET. OUTPUT S5
STATUS & DET. OUTPUT S6
STATUS & DET. OUTPUT S7
STATUS & DET. OUTPUT S8
DATA BUS 0
DATA BUS 1
DATA BUS 2
DATA BUS 3
DATA BUS 4
DATA BUS 5
DATA BUS 6
DATA BUS 7
CHASSIS (EARTH) GND
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
J2
R7404
J1
10 TO 38 VDC
}
SOLID STATE OUTPUTS MUST BE TRANSIENT PROTECTED, SEE TEXT FOR DETAILS
*
D0284
*
Figure 20—R7404 Terminal Configuration (Standard Model)
