Ademco - 642 Fire Transmission Relay And Power Supply

No 642 FIRE TRANSMISSION RELAY POWER SUPPLY LINES MUM LOOP RES I STANCE OHMS CIRCUIT BELL TERMINALS OF VOLT D C CONTROL POLARITY CIRCUIT RECHARGEABLE SEE NOTE AT RIGHT I ES POLARITY VOLT A C HZ AC POWER FAILS LAMP GO OUT AND SIGNAL WILL SENT TO RECEIVING I ON NO 642 a U L used at used with No 625 premises connect Alarm Master an Ademco Fire Modularm Fire Mini a polarity No 642 No 90 2 phone 3,4 8 5 POLARITY e standby Connect Connect Terminal to Negative to Positive a Junction No 1341 maximum ampere Ademco pack No 597 cells cells maximum charging cells approximately ma with hours 2 3 8 6 may be used place when U L not shown an alternative 12V D C No 460 PoLAruTx I NALS 7 8 TERMINALS at 6V DC control ohm resistor resistor exceed series No 605 TERMINALS ohms 12V DC systems no bell ohm 10 watt must be connec I a be i 9 10 will AC outlet AC fails AC connected on will out and a TROUBLE signal 0 92 TROUBLE VOLTAGE OUTPUT APPEARS TERM I NALS AND 2 CAUSE No 642 and used disconnected and 8 of No 642 bells bell upon and 8 depend a proper bells watt used no bells used sub 7.5 ohm Ademco No 6051 THE SYSTEM IS USED IN THE MANNER WITHOUT A BELL SYSTEM CANNOT BE U L short wires and 2 of No excess 30 volts and 2 no voltage 642 present phone defect 30 volts short a ohms or encountered A TROUBLE CONDITION AT THE CENTRAL STATION CAUSE AC power batteries will out sure pluqqed outlet which No a 24 hour outlet switches consult break and 2 to panel similarily corroded No 317 contact No 316 burnishing