Alarm In/Out Connector - Eci Telecom NPT-1020 Installation And Maintenance Manual

NPT-1020 Installation and Maintenance Manual
Pin Name
14 N/C
15 GND
16 ALM_O2
17 N/C
18 BUZ_COM
19 N/C
20 GND
21 CRIT_COM
22 N/C
23 MAJ_COM
24 GND
25 N/C
26 GND
27 MIN_COM
28 N/C
29 WARN_COM
30 GND
31 N/C
32 N/C
33 N/C
34 N/C
35 GND
36 N/C

8.19.2 ALARM IN/OUT Connector

The ALARM IN/OUT connector is a 68-pin SCSI female connector that carries three groups of lines to the
customer equipment:
Sixteen external alarm inputs connected to the ALARM inputs of the NPT platforms. Four inputs are

allocated to each one. Each input is activated by closing a dry contact provided from the customer's
facility.
Eight sets of changeover relay contacts, floating with respect to platform ground, that serve as rack

(bay) status outputs. Each couple of the eight relays is assigned to the two output alarm lines of each
NPT platform connected to the RAP-4B.
Four sets of changeover relay contacts, floating with respect to platform ground, that serve as rack

(bay) alarm indication lines. The relays, identified as critical, major, minor, and warning, are activated
by the corresponding alarm relays of NPT platforms.
Relay contact ratings are 72 V in open state and 1A in closed state.
ECI Telecom Ltd. Proprietary
Function
--
Ground
Alarm output 2 common
--
Buzzer common
--
Ground
Critical alarm common
--
Major alarm common
Ground
--
Ground
Minor alarm common
--
Warning alarm common
Ground
--
--
--
--
Ground
--
Connection Data
Direction
--
--
Output
--
Input
--
--
--
--
Input
--
--
--
Input
--
--
--
--
--
--
--
--
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