Alarm Relay Connections; Alarm Relay Connections (J5) - Motorola McIAS 1610 Series System Manual

2.8

Alarm Relay Connections

Connections for major and minor alarms are made via dry contact closures on the
Alarm Transition board. These closures are connected from a male 50-pin cable
connector to the alarm panel at the CO. Backplane connector J5 serves the alarm
circuits; see Figure 1-3. Alarm relay pin connections are shown below.
Pin Number
50
49
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
NOTE: Requires one 25 pair male connector and cable.
NOTES:
NO = Normally open contacts during idle, non-alarm conditions.
COM = Common relay contact point.
* No LED indication of Minor 4 alarm on front panel. Activation of this relay indicates
failure of signal battery input or Fuse 2.
Connect to
Not used
Not used
Not used
Not used
Not used
Not used
Not used
Not used
Not used
Not used
Not used
Not used
Not used
Not used
Not used
Not used
Not used
Not used
Not used
Not used
Minor alarm 4 (NO)*
Minor alarm 3 (NO)
Minor alarm 2 (NO)
Minor alarm 1 (NO)
Major alarm (COM)
Contacts close during alarm conditions.
Table 1-3

Alarm Relay Connections (J5)

Pin Number Connect to
25 Not used
24 Not used
23 Not used
22 Not used
21 Not used
20 Not used
19 Not used
18 Not used
17 Not used
16 Not used
15 Not used
14 Not used
13 Not used
12 Not used
11 Not used
10 Not used
9 Not used
8 Not used
7 Not used
6 Not used
5 Minor alarm 4 (COM)*
Minor alarm 3 (COM)
4
3 Minor alarm 2 (COM)
2 Minor alarm 1 (COM)
1 Major alarm (NO)
17