Figure 2. Alarm Connection - ADTRAN Smart 16e Shelf User Manual

Smart 16e Shelf User Manual
Alarm Connections
The terminal strips located on the back of the Smart 16e Shelf controller card are labeled ALARM. They
are used for audio or visual alarm indicators provided by the user. The top two terminals are a set and the
bottom two are a set. The terminals are activated together when the cards inserted in the designated slots
encounter an alarm condition such as primary link failure.
To verify operation of the terminal strip, measure the impedance across each set. The impedance should be
open when the shelf is not in alarm and shorted (approximately 0.6 ohm) when in alarm. The two alarm
sets operate identically and should have the same impedance. The power specifications for any alarms used
are NEC Class 2 and 48 VDC @ 500 mA maximum. Figure 2 shows the alarm connection.
64202023L5-1B
SMART 16e
AC
POWER I/F
L
A
N
10 BASE T
D
T
E
/
D
C
E
E
I
A
2
3
2
Alarm Relay
ALARM
NO
COM
NO
COM
F1
F2
115VAC/60 HZ
2.5 AMP

Figure 2. Alarm Connection

© 2004 ADTRAN, Inc.
Power
Source
#1
#2
Power
Source
5A
250V
3AG
Installation of Controller Card
25