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SME240-1 2-20
Owner's Manual

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Howard Ibbitson
March 2, 2025

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Summary of Contents for RFI SME240-1 2-20

  • Page 1 SME240-1 2-20 Owner's Manual...
  • Page 2: Table Of Contents

    RFI makes no claim as to the accuracy or suitability of the information contained in this manual or from any other documentation. RFI accepts no liability for any loss or damage, which may occur as a result of improper or unsafe use of its...
  • Page 3: Introduction

    CONDITIONS. INTRODUCTION The RFI SME240-1 2-20 (battery charger/eliminator) provides a power output of 280 watt at 1 3.6 Volts. The nominal input mains may be 220 V to 240 V and 50 Hz. The SME240-1 2-20 has been designed specifically for telecommunications applications demanding high reliability, low noise, fully automatic battery backup, battery protection and full protection of the output.
  • Page 4: Battery Lvd Operation

    Model Battery Disconnect Condition Validation time ±30% (LVD_Disconnect) SME240-1 2-20 1 0.25 V ±0.25 V 1 .8 sec The battery will be connected to the charger/load output when its voltage rises above the following levels:...
  • Page 5: Battery Charging Operational Requirements

    Temperature Compensation Model Temperature Compensation (Reference Temperature = 20 °C) SME240-1 2-20 -1 8 mV/C A thermally controlled fan is used to maintain temperatures a non latching thermal shut down is used to protect against overheating due to: •...
  • Page 6: Alarm Output

    A pair of normally closed, floating relay contacts are provided to indicate alarm conditions. Alarm conditions are defined as any one or more of the following events: • The mains fails. • Over Voltage shut down has occurred. • Thermal Shut down has occurred. •...
  • Page 7: Dimension & Mounting

    Feet The SME240-1 2-20 has 4 x “feet” positioned in the corners of the bottom surface for bench mounting. Mounting Points The enclosure includes 4 x M3 threaded inserts on the bottom surface to allow the unit do be screwed to a mounting bracket.
  • Page 8: Installation

    Installation should only be conducted and/or closely supervised by appropriately qualified person. The unit is supplied with 4 rubber feet for bench use. However, a number of mounting options have been provided to suit various installations. Mounting options have been provided underneath of unit in the form of M3 x 0.5 mm threads.
  • Page 9: Connection

    The requirements for wiring a SME240-1 2-20 into a system are as follows: LOAD (+L) & 0V These 2 connections are the DC output of the power supply. These connections are to supply the load. • These connections cannot be paralleled with output of duplicate power supply for increased current output.
  • Page 10: Cooling

    The SME240-1 2-20 power supply has inbuilt thermal cooling to maximuse fan life. Please ensure that there is no restriction to the venting of the unit. ACMA C-Tick NSW Fair Trading Approval Number U20348EA Yes...
  • Page 11: Approvals

    021 478 DOC BCE282 Series User Manual -B...

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