ADTRAN ATLAS 550 Bedienungsanleitung PDF herunterladen (Seite 42)

Chapter 2. Installation

2-6 ATLAS 550 User Manual 61200305L1-1

Alarm Relay Connection

This connection alerts the user when a selected alarm condition exists. The

four-pin, removable terminal block connects with external wiring. To make

the appropriate connections, remove the block, connect wiring as needed,

and return the terminal block to the connector socket. Clear the alarm con-

ditionbypressingtheAlarmCut-Off(ACO)switchlocatedonthefont panel

of the ATLAS 550.

Table 2-4 shows the pinout for the AlarmRelay connector.

External Alarm Relay Monitor Connection

This connection alerts the user when a selected external alarm condition ex-

ists.Thisconnection couldbe usedto monitor aUPSwithdry contacts or an-

other ATLAS 550.The two-pin, removable terminal block connects with

external wiring. To make the appropriate connections, remove the block,

connect wiring as needed, and return the terminal block to the connector

socket.Clearthe alarm condition bypressing theACOswitch locatedon the

front panel of the ATLAS 550.

After the appropriate connections have been made, tighten the

screws using a flathead screwdriver before reinserting the terminal

block into the rear panel of the ATLAS 550.

Table 2-4. 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) Common connection between external

circuitry and NC or NO terminal.

4 Chassis Ground (GND)

After the appropriate connections have been made, tighten the

screws using a flathead screwdriver before reinserting the terminal

block into the rear panel of the ATLAS 550.

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ADTRAN ATLAS 550 Bedienungsanleitung Seite 42