Nortel Passport 15000, Hardware Installation And Maintenance, Page: 243 / 874

Chapter 17 Hardware procedures 243
Passport 15000, 20000 Hardware Installation, Maintenance, and Upgrade 5.2S2
24 MINANO output minor audible alarm contact; NO of form C
isolated contact, normally open on alarm
25 EXTALMNO output aisle alarm contact; NO of form C isolated
contact, normally open on alarm
Table 5
Pinout of the BIP female D-sub high-density 26-pin connectors P7 through P10
Pin Signal Function Description
1 MINA input minor audible alarm input from the shelf; normally open circuit (O/C)
to LGND to activate
2 MAJA input major audible alarm input from the shelf; normally O/C to LGND to
activate
3 CRITA input critical audible alarm input from the shelf; normally O/C to LGND to
activate
4 SHID4 output shelf identification, switch 2, bit 2; 10 mA maximum for O/C or LGND
5 LGND input is LGND at 0 V dc for the shelf-provided reference for all BIP and
shelf alarms
6 +5 V input +5 V of secondary power from the shelf with a 70 mA maximum is
needed to run the LED portion of the optocouplers for the shelf-to-
BIP interface (an optocoupler is a transistor triggered by light, used
to separate primary and secondary alarm circuits inside the BIP)
7 ALMFAIL output signal to the shelf that the alarm module has a failure or has lost
input power; normally LGND to O/C on report of a failure
8 FOLLOW input method by which the shelf can activate the frame level follow me
indicator and an aisle alarm; normally O/C to LGND to activate
9 LEDTEST output report to the shelf that testing the LEDs (LEDTEST) has been
requested; upon receipt of the signal, all the LEDs light for about 5
seconds; O/C or LGND at 50 mA to test
10 MINV input minor visible alarm input from the shelf; normally O/C to LGND to
activate
(Sheet 1 of 2)
Table 4 (continued)
Pinout of the BIP female D-sub 25-pin connector P3
Pin Signal Function Description
(Sheet 3 of 3)