Main Features
 Mains Isolated
 Input Voltage 240VAC +/- 20%
 Output 13.8 VDC (Adjustable)
 Current Limit to 22 Amps
 Switch mode Down Converter
 Load Protection
 Over Voltage Protection
 Float Style Battery Back-Up
 Battery Protection
 Battery Charge with Charge State Ind.
 19" Rack Mountable 3RU
 MTBF > 60000 Hours @ 50°C
 Suitable for High Temp. Environments
 Built for High Vibration Environments
 Designed with Long Life Components
 Specifications
 Mains Input 50 Hz  240 +/- 20% (110V Available)
 Mains Isolation TO AS3108
 Normal Output Voltage (1A) 13.75 Adj.
 Regulation (Normal mains 1-15 A) < 250mV
 Constant Current Point 20 Amp 0, + 2 Amp
 Hum, Noise & Ripple   < 100mVpp
 (15 A Load, 20MHz BW) < 15 mVpp RMS
 Over Volts Lockout 15.5V +/-0.4 V
 Battery Disconnect   < 11.2V +/-0.4 V
 Reverse Polarity Protection   Absolute
 Temperature   -10 to 70°C
 Expected Life  (40°C Ambient, Full Load)  > 15 Years
 MTBF (Calculated)   >60,000 Hours @ 50°C
 RFI (3KHz BW - 100MHz)   Better than -70dBm
 Height 3RU   132mm
 Depth 70mm
 Width 19" Rack   432.mm
 Weight:  7Kg
 Mounting   4 Screws Rack Mount
 Additional Specifications
Toroidal Power Transformer -  Austel: Certified Component No. A92/MT/0222
ETSA Approval : CS/1083/S  Complies with AS3108-1990, AS 3193-1990
Transformer : Dept. Mines & Energy (NSW)  Compliance to AS3108, Certificate No. CS4567N
EMC Technologies : (NATA Approved Test Authority) Verification Report No. M51138X (29/12/95)
Test Standards :  EN55022 (CISPR 22:1994)
  EN50082-1 (1992)
 IEC801-2 Immunity to Electrostatic discharges
 IEC801-3 Immunity to Radiated fields
 IEC801-4 Immunity to Electrical fast transients
Complies with the EMC directive 89/336/EECThe European CE marking applies to this product
The 093120 is a 13.8 VDC Amp Transformer Isolated Switch mode Down Converter designed to be used either as a stand alone supply or as a float style battery backed up supply when a lead acid battery is connected to it's battery terminals.

The 093120 was designed for wide mains voltage swings (240 +/-20%) and high temperatures and vibration. The supply is rated at 60°C and has been NATA tested at 70°C at full load at 280VAC mains. It was originally designed for railway trackside applications where such conditions apply. It is very suitable for applications where the mains supply is poorly regulated and temperatures can be extreme.

The system offers full battery management features not commonly found in this type of power supply. The unit protects the equipment it is connected to as well as the batteries themselves. Details of it's operation are outlined in the Operational Specifications.

The power supply has been designed and built using components which are of "long-life" grade, with the PCB being 70 micron Cu (2 x normal). The quality and reliability is well worth the slightly higher unit cost.

Detailed Operational Specifications

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