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Model 298 ADA-Compliant Emergency Telephone
Pub. 42004-304A
f:\standard ioms - current release\42004 instr. manuals\42004-304a.doc
06/02
DISABLING 24 VOLT POWER MODE
To disable the 24 volt power mode and return to 48 volt mode, just remove the jumper clip from the key
switch connector on the main circuit board.
Specifications
Electrical
FCC Registration Number.....................................................................................ADGUSA-18345-MT-T
Ringer Equivalence Number (REN).................................................................................................... 0.5B
Operating Temperature Range..........................................................................................-15º C to +60º C
Relative Humidity .................................................................................................to 95%, no condensation
Network Interface ...................................................................................................................USOC RJ11
Operation................................................................................................................................... Loop start
Auto-dial Digit Limit.....................................................................................................................20 digits
Auxiliary Output Electrical Specifications
Maximum Voltage (Vmax).............................................................................................................48 V dc
Maximum Loop Current (Imax) ...................................................................................................... 75 mA
Maximum Voltage Drop (Vmax drop) ...........................................................................................3.0 V dc
Minimum Voltage Drop (Vmin drop)........................................................................................... 0.25 V dc
Polarity.................................................................................................... TB2-1 positive; TB2-2 negative
Mechanical
Construction .................Front Panel ......................................................... 14-gauge brushed stainless steel
Back Box ...................................................................... 16-gauge cold-rolled steel
Dimensions ...................Panel ........................................................ 12 H
×
10 W inches (304.8
×
254 mm)
Back Box (Depth from mounting surface) ...........................2.38 inches (60.5 mm)
Panel Cutout...................................10.13 H
×
7.63 W inches (257.3
×
193.8 mm)
Weight................................................................................................................................. 6.5 lbs. (3 kg)
REPLACEMENT PARTS
Part Number
Description
12604-003
Fuse Replacement Kit
12522-001
Speaker Replacement Kit
12521-001
Microphone Replacement Kit
12562-001
PCBA Replacement Kit
12520-006
Red Round Sealed Push Button Replacement Kit
12520-007
Black Round Sealed Push Button Replacement Kit
25440-002
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