Instruction manual

61200780L1-1C © 2004 ADTRAN, Inc. 348
ATLAS 800 Series System Manual
Figure 3. ATLAS 890 Rear View
Instructions
1. Using standard Telco cross-connect wire or equivalent, determine and cut the length required to reach
from the external input header to the equipment to be sensed.
2. Using wire strippers, strip ¼-inch from both ends of each wire.
3. Remove the external input (3 pin) terminal block by gently prying it loose.
4. Using the small, straight slot screwdriver, loosen the screws in the terminal block.
5. Insert the wires in the terminal block as determined in steps 1 and 2, and tighten the screws. (A chassis
ground connection is also provided.)
6. Replace the terminal block.
Table 2. External Input 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.
3 Chassis Ground
External Input
Connector
Alarm Relay
Connector
ALARM
EXT
INPUT
NC
NO
COM
INPUT
VOUT