ATLAS 550 System Manual - Adtran

ATLAS 550 System Manual Section 2 Engineering Guidelines
External Alarm Relay Monitor Connection
This connection alerts the user when a selected external alarm condition exists. This connection could be
used to monitor a UPS with dry contacts or another ATLAS 550. The 2-pin, removable terminal block
connects with external wiring. Refer to DLP-14, Connecting the Alarm Contacts, for detailed instructions.
Clear the alarm condition by pressing the ACO switch located on the front panel of the ATLAS 550.
Table 6 shows the pinout for the External Alarm Relay connector.
Alarm Relay Connection
Table 6. External Relay Monitor Connector Pinout
Pin Name Description
1 ALARM OUT Outputs EIA-232 level signal for connection to external alarm contacts.
2 ALARM IN Monitors signal coming from external alarm contacts.
This connection alerts the user when a selected alarm condition exists. The 4-pin, removable terminal
block connects with external wiring. Refer to DLP-14, Connecting the Alarm Contacts, for detailed
instructions. Clear the alarm condition by pressing the ACO switch located on the front panel of the
ATLAS 550. Table 7 shows the pinout for the Alarm Relay connector.
Table 7. Alarm Relay Connector Pinout
Pin Name Description
1 NORMALLY CLOSED (NC) Opens when a selected alarm condition is present.
2 NORMALLY OPEN (NO) Closes when a selected alarm condition is present.
3 COMMON (COM)
4 CHASSIS GROUND (GND) Ground connection.
Common connection between external circuitry and NC or NO
terminal.
5. NETWORK INTERFACE MODULES
The ATLAS 550 provides two Network Interface Slots that allow different types of interfaces to be used.
Available Network Interface Modules include the following:
• T1/PRI Network Interface Module (P/N 1200307L1/L2), USOC RJ-48C. (See page 34.)
• E1/PRA Network Interface Module (P/N 1200308L1), 15-pin female D-connector. (See page 34.)
• Modem Management Network Module (P/N 1200341L1), USOC RJ-11C. (See page 35.)
• BRI DBU Network Module (P/N 1200327L1), USOC RJ-49C. (See page 36.)
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