ADTRAN MX410 - Manual (Page 42)

Rear Panel MX410/MX412 System Manual
4-4 PRELIMINARY 61189500L1-1B
Alarm Contacts/AUX Inputs
The alarm contacts and auxiliary (AUX) inputs are shown in Figure 4-4 .
Figure 4-4. Alarm Contacts and AUX Inputs
The alarm interfaces connect to the nine Form C type relays on the MX410/MX412 labeled
CRIT , MAJOR , and MINOR . Both NC (Normally Closed) and NO (Normally Open) contacts are
provided. Connect the CRIT (Critical), MAJOR , and MINOR alarm leads from the fuse and alarm
panel to the C (Common) and NO or NC wire-wrap terminals on the MX410/MX412 rear panel
as required.
Auxiliary alarms 1-4 connect to the MX410/MX412
AUX INPUTS labeled 1 - 9 . These pins detect
open and closed relay contacts and are not polarity sensitive. Table 4-1 shows the pin assign-
ments for the AUX INPUTS .
The alarm severity level can be changed in the Environmental Alarms menu.
After the alarm contact and AUX input connections have been made, install the protective
cover over the wire-wrap headers.
Table 4-1. AUX Inputs 1-9 Pin List
AUX INPUT Function Default Severity Level
1, 2 Alarm 1 Critical
3, 4 Alarm 2 Major
5, 6 Alarm 3 Minor
7, 8 Alarm 4 Alert
9 No Connect N/A