NPT-1020 Installation and Maintenance Manual
Connection Data
ECI Telecom Ltd. Proprietary
8-43
Pin
Name
Function
Direction
14
N/C
--
--
15
GND
Ground
--
16
ALM_O2
Alarm output 2 common
Output
17
N/C
--
--
18
BUZ_COM
Buzzer common
Input
19
N/C
--
--
20
GND
Ground
--
21
CRIT_COM
Critical alarm common
--
22
N/C
--
--
23
MAJ_COM
Major alarm common
Input
24
GND
Ground
--
25
N/C
--
--
26
GND
Ground
--
27
MIN_COM
Minor alarm common
Input
28
N/C
--
--
29
WARN_COM
Warning alarm common
--
30
GND
Ground
--
31
N/C
--
--
32
N/C
--
--
33
N/C
--
--
34
N/C
--
--
35
GND
Ground
--
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.