ATL Telecom AM2048 - Manual (Page 32)

ascom
telecom USER GUIDE AM768A/AM2048A
32
Issue 8
5.6 Alarm Input/Output Port
The alarm port provides 6 logic level inputs, and the contacts of two changeover relays. The pinout is
shown below:
PANEL VIEW
1 2 3 4
8 7 6 5
9 10 11 12
13
1
2
3
4
5
6
7
8
9
10
11
12
13
RELAY 1 CLOSED = Urgent Alarm
RELAY 1 COMMON
ALARM INPUT 1
GND
RELAY 1 OPEN = Urgent Alarm
RELAY 2 CLOSED = Non-Urgent Alarm
RELAY 2 COMMON
RELAY 2 OPEN = Non-Urgent Alarm
ALARM INPUT 2
ALARM INPUT 6
ALARM INPUT 5
ALARM INPUT 4
ALARM INPUT 3
Figure 7 - Alarm Connector
In the de-energised state, the urgent alarm relay closes the contact between pins 1 and 2 (pins 2 and
3 are open) and the non-urgent alarm relay closes the contact between pins 4 and 5 (pins 5 and 6 are
open).
When power is applied and all alarms are off, the urgent alarm relay opens the contact between pins
1 and 2 (pins 2 and 3 are closed), the non-urgent alarm relay opens the contact between pins 4 and 5
(pins 5 and 6 are closed).
In the ELU, the alarms relay outputs may be used to integrate the AM2048 into the exchange alarm
system.
To save power in the NTU the alarm relays are disabled.
The alarm inputs are available at both the ELU and the NTU and may be used for alarm collection
from other equipment, e.g, door open alarm, battery low alarm, temperature alarms etc. The alarm
inputs detect a short circuit between the alarm input pin and GND (pin 13)
Mating connector -
Ascom Part Number
CONN 13 WAY PLG 6/313/000/002
Screened Cable Assembly- Ascom Part Number
CABLE AM2048A ALARM 6/910/000/424
(See Appendix B)