Specifications

A-14
Reference Guide
Model No.
Running Head
Model 8905 Power Converter 120/240 VAC to -48 VDC, 100 W, CE Marked
Input Voltage 90 Vrms to 260 Vrms
Input Frequency 50/60 Hz
Output Power 100 W Max.
Output Voltage -48.0 VDC
Output Current 2 amp
Max. No. per System 2
Redundancy Optional
Ventilation Convection cooled
Approvals EN 60950/A2, EN 50 081-1, EN 50 082-1, UL 1459, UL 1950, CSA-C22.2 No. 950
Model 8906 Ring Generator, -48 VDC
Input Voltage 45 to 56 VDC
Efficiency 60% at 48 V and 1 kOhm load
Protection 5 A slow blow fuse, primary current limiting
Noise Less than 32 dBrnc
Output Voltage 100 VDC rms default - adjustable from 60 to 105 Vrms
Output Current 160 mA RMS Continuous
Output Frequency 20 Hz +
1 Hz
Protection Output short circuit and overload protection
Operational Modes Strap selectable: Master or Slave
Max. No. per System
600 System
800 and 900 System
1
5:1 Master, up to 4 Slave
Redundancy There is no provision for Master Ringer redundancy, however the slave units back each
other up.
Ventilation Convection cooled
Approvals UL 1459, UL 1950, CSA-C22.2 No. 950
Model 8907 Power Supply -24 VDC, CE Marked
Input Voltage 18 to 36 VDC
Input Surge Current Maximum 12 amp at 36 VDC
Output Power Continuous 55 W
Max. No. per System 2
Redundancy Optional
Ventilation Convection cooled
Protection Unit is fused protected from short circuits and over-voltage
Unit is diode protected from reversed polarity
Approvals EN 60950/A2, EN 50 081-1, EN 50 082-1, UL 1459, UL 1950, CSA-C22.2 No. 950
Model 8908 Power Converter 120/240 VAC to -48 VDC, CE Marked
Input Voltage 100 Vrms to 260 Vrms
Input Frequency 50/60 Hz
Output Power 300 W Continuous
Output Voltage -48 VDC
Output Current 7 amp
Max. No. per System 2
Redundancy Optional
Ventilation Fan cooled
Approvals EN 60950/A2, EN 50 081-1, EN 50 082-1, UL 1459, UL 1950, CSA-C22.2 No. 950