Setec ST20-II User Instructions Download Page 3

ST – II Series POWER SUPPLIES

USER INSTRUCTIONS

Power supply unit should only be powered from either 240VAC mains or Auxiliary Power 
(Auxiliary Power also includes solar power) but 

not both

.  Failure to do so may result in damage to 

power supply. 

Protection: 

the power supply provides automatic protection for overload including short circuit, 

over-voltage, over-temperature and reverse connected battery. In such instances the Fault indicator 
will illuminate and the power supply will shut down. It will attempt to automatically restart every 5 
seconds until such case that the fault is removed.

Fusing: 

Each load circuit and the battery have been fused to provide fault protection and 

discrimination. Refer to servicing section for maximum fuse ratings. 

CAUTION:

This appliance is 

not

 intended for use by young children or infirm persons without supervision.

Young children should be supervised to ensure that they do not play with the appliance.
Power supply unit should only be powered from either 240VAC mains or Auxiliary Power 
(Auxiliary Power also includes solar power) but not both.  Failure to do so may result in damage to 
power supply.

Page 3 of 11

Issue F

Summary of Contents for ST20-II

Page 1: ...of the load from an external 13 8V DC power source The units are fully enclosed ready for direct wall mounting All connections are at the rear of unit providing convenient wiring and installation Use...

Page 2: ...battery will be charging at 0 8A When the battery voltage is sufficient 10 5V for first power up 11 5V and 11 7V for subsequent reconnection with and without mains respectively the LVD will connect th...

Page 3: ...ll shut down It will attempt to automatically restart every 5 seconds until such case that the fault is removed Fusing Each load circuit and the battery have been fused to provide fault protection and...

Page 4: ...shut down A minimum ventilation of 20 000mm2 to the outside world must be provided CAUTION Do not install unit in same compartment as batteries or flammable material such as petrol Ensure that the ins...

Page 5: ...ating QC connector suitable for cable size Connector pin out is shown below Cabling sizes DC cables must be sized to carry the maximum full load current and not exceed the system volt drop requirement...

Page 6: ...r supply terminal or negative chassis ground If battery is connected to chassis ensure a connection exist from chassis to Batt VE terminal of power supply Battery Disconnection Procedures Battery shou...

Page 7: ...servicing a battery disconnect the power supply Batteries are electrically alive at all times and must be treated with extreme caution They can supply high short circuit currents even if they appear d...

Page 8: ...tion 17V Over Current Protection ST20 II 20A to 25A load battery current ST35 II 35A to 38A load battery current Battery Current Limit 10A 1A ST20 II 15A 1A ST35 II Battery Connect Disconnect Connect...

Page 9: ...A detailed description of the operational requirements for the charging algorithm is described below Present Output Set Voltage Conditions Required to Enter Operational State Operational State New Ou...

Page 10: ...oost charging mode active after resumption of mains input supply set 15 minute boost timer Vboost Vboost No mains input voltage is detected Boost charging mode while no mains is detected Vboost No Mai...

Page 11: ...or devices in close proximity 3m and as such do not guarantee that the power supply will not cause interference with devices such as TV s or radios The ST20 II 35 II have been designed with equipment...

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