
8-38 Cabling, installing, and configuring the peripheral devices
Connecting external alarms
Standard 1.0 Option 11 EC Installation and Maintenance Guide November 1999
Connecting external alarms
Alarm relays
The EC 11 provides two Form-C dry contact relays for
connection to customer-provided alarms. Each relay contact
is rated at 0.5 amps and 150 VDC. The major alarm can be
triggered by the Enhanced MMP40 or MMP40 processor, a
board reset, power off condition, or watchdog timeout (which
has a fixed 128-second timeout interval). The minor alarm
can be triggered by software control to flag operational
problems.
The alarm cable connects EC 11 alarm signals to external
customer-provided alarm devices. The table in this section
contains the signal names and associated wire colors for the
NTDK59AA alarm output cable. Pin numbers are for the
ALM/MOD connector on the EC 11.
ALM/Modem
pins Wire color Signal Purpose
6 BL/R MAJCM Major CM
14 R/BL MAJNC Major NC
7 O/R MAJNO Major NO
3 G/W MINCM Minor CM
11 W/G MINNC Minor NC
4 BR/W MINNO Minor NO
1BL/WMR1Not used
9W/BLMT1Not used
2 O/W LRTN Not used
10 W/O LRTN Not used
5S/WCRITCNot used
13 W/S POWMON Not used
15 R/O CRITO Not used
12 W/BR CRITM Not used
Comentarios a estos manuales