TM 11-5815-602-10
EE161-DM-OPI-010/E154UGC74
TO 31W4-2UGC74-1
Some type of covering, such as a blanket or poncho should be used to prevent entry and
cut down on the effects of these corrosive elements.
A power reduction of 15% (97.75 V) for 115 volts ac operation or (195.5 V) for 230
q
volts ac operation will not hamper normal terminal operation.
Occurs when 12 volt dc battery backup power is applied to the terminal.
q When prime power reduction causes the internal +22 to +30 volts dc to drop to less
than 12 volts dc, the terminal automatically enters the Battery Backup Condition.
Occurs when either a message memory or keyboard failure occurs.
q
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