HELIOS SR250HL Power Supply Float Charger for Lead Acid Batteries 250W User Manual

Power Supply Float Charger for Lead Acid Batteries 250W
User ManualSR250HL Power Supply/ Float Charger for Lead Acid Batteries 250W

SR250HL Power Supply Float Charger for Lead Acid Batteries 250W

STANDARD FEATURES

3 Relay Alarms-Form C

Float Charger –Lead Acid Batteries
OPTIONAL FEATURES

COMM’s:
• RS232
• RS485
• Modbus RTU
• SNMP V1 & Webpages

Customizable Digital I/O

Temperature Sensor on 1.7m lead with adhesive pad: -4mV / °C /cell ±10%

N+1 Redundancy

SAFETY

The user is responsible for ensuring that input and output wiring segregation complies with local standards and that in the use of the equipment, access is confined to  operators and service personnel. A low resistance earth connection is essential to ensure safety and additionally, satisfactory EMI suppression (see below).
HAZARDOUS VOLTAGES EXIST WITHIN A POWER SUPPLY ENCLOSURE AND ANY REPAIRS MUST BE CARRIED OUT BY A QUALIFIED SERVICEPERSON.
Electrical Strength Tests
Components within the power supply responsible for providing the safety barrier between input and output are constructed to provide electrical isolation as required by the  relevant standard. However EMI filtering components could be damaged as result of excessively long high voltage tests between input, output and ground. Please contact our  technicians for advice regarding electric strength tests.
Earth Leakage
Where fitted, EMC suppression circuits cause earth leakage currents which may be to a maximum of 3.5mA.
Ventilation
High operating temperature is a major cause of power supply failures, for example, a 10°C rise in the operating temperature of a component will halve its expected life.  Therefore always ensure that there is adequate ventilation for the equipment. Batteries in particular suffer shortened lifetimes if subjected to high ambient temperatures.
Water / Dust
Every effort must be made in the installation to minimise the risk of ingress of water or dust. Water will almost always cause instant failure. The effects of dust are slower in  causing failure of electronic equipment but all electrical equipment should be cleaned free of any dust accumulation at regular intervals.
Electromagnetic Interference (EMI)
Switching power supplies and converters inherently generate electrical noise. All wiring should be as short as practicable and segregated from all equipment wiring which is  sensitive to EMI. Residual noise can be reduced by looping DC wiring through ferrite cores (sleeves). These are most effective as close to the power supply as possible and as  many turns of the wire taken through the core (+ and – in the same direction) as the core will accommodate.
External fuse protection
Fuses or circuit breakers must be used in all battery circuits to protect against short circuits. External fuses should be used for power supplies/chargers even though they are usually internally protected.
Connection polarity
It is critical to check the polarity carefully when connecting DC devices even with models which have non-destructive reverse polarity protection.
Glossary of terms used in our user manuals
PSU = power supply unit
ELVD = electronic low voltage disconnect
SNMP = Simple Network Management Protocol
BCT = battery condition test
RPP = reverse polarity protection
EMC = Electromagnetic compatibility
ECB = electronic circuit breaker
EMI = electromagnetic interference
DOD = depth of discharge

INTRODUCTION:

The SR250HL range is designed for use as a reliable and stable AC to DC power supply, or float charger for lead acid batteries. Note that for float charging the output voltage must be set to approximately 15% above the nominal battery voltage models. This is done as the default voltage for the 12V model but must be specified at time of order for all higher voltage models.

FRONT & BACK PANEL LAYOUT

1. AC INPUT IEC60320 – C13 10A

2. Digital Inputs (pins 1,2)/ Input or Output (pin 3)/ Return (pin 4) I/O terminals are customizable and if used, the product will have a unique code.

3. ALARMS RELAY FORM C: Relay contacts shown in de-energised state(ie. When there is a fault condition). Alarm relays are energised when power supply is operating normally, eg. “Power” alarm relay is energised when input voltage present.
   •DC High : DC Output High
   • POWER: Loss of mains input power. This alarm has 30 seconds delay before activation upon mains failure. PSU fails
   • DC Low: DC Output Low or Battery voltage low if used as a charger.

4. DC CONNECTIONS

5. LED indications Code: DC OK , Power OK and Standby

6. COMMS PORT
   • RS232 (ASCII) https://www.heliosps.com/sr-series-downloads/#rs232-rs485 -commands-sr-series
   • RS485 (ASCII) https://www.heliosps.com/sr-series-downloads/#rs232-rs485 -commands-sr-series
   • Modbus RTU https://www.heliosps.com/sr-series-downloads/#serial-modbus-rtu- sr-series
   • SNMP, Webpages https://www.heliosps.com/sr-series-downloads/#snmp-sr- series

7. TEMPCO SENSOR (OPTIONAL): 1.8m Temperature sensor for voltage compensation

FG – Frame Ground
This terminal provides a connection to the metal case for earthing.

MODEL CODING AND OPTIONS

 N+1 REDUNDANCY

Models with the -P suffix, eg. SR250HL24TXLP-LAN+ , have an internal output diode for use where N+1 redundancy is required.

CONNECTION NOTES

• The models with the screw/unpluggable connectors have two terminals per polarity, each one is rated at 20A and so when the load current exceeds 20A both terminals must be used.
• If used as a battery charger ensure that the battery polarity matches the power supply /charging output.
• Alarms can be tested by using an external variable voltage supply.

COMMUNICATIONS

Refer to separate additional user manual for information on the communications options.
COMM’s Port (if installed) , for models with communications please refer to

• RS232 (ASCII) https://www.heliosps.com/sr-series-downloads/#rs232-rs485-commands-sr-series
• RS485 (ASCII) https://www.heliosps.com/sr-series-downloads/#rs232-rs485-commands-sr-series
• Modbus RTU https://www.heliosps.com/sr-series-downloads/#serial-modbus-rtu-sr-series
• SNMP, Webpages https://www.heliosps.com/sr-series-downloads/#snmp-sr-series

TECHNICAL SPECIFICATIONS

request
Voltage Adj. Range| 85% – 120% of Nominal
Overcurrent protection| Constant current limit under overload and short circuit conditions
Isolation| Input – earth – 2.5KVdc Output – earth – 500Vdc
Efficiency| > 85%
Inrush Current| Soft start circuit
Operating temperature| 0 to 50 °C ambient at full load. De-rate linearly

50°C to no load @ 70 °C
Humidity| 0 – 95% relative humidity non – condensing
Cooling| Natural convection , except for 12V
LED Indication| Green: DC OK
Green: Power OK
Red: Standby
Alarm Relays| Form C contacts changeover, rated 30VDC,2A/110VDC,0.3A/125VAC,0.5A DC High POWER (mains fail, PSU fail) DC Low
Line Regulation| <0.2% over input range
Load Regulation| <0.4% open circuit to 100% load
Noise| <0.1%
Transient response| 200mV over/undershoot, Load step 20-100%, 400us settling time
Hold-up time| 15-20 ms (nom-max. Vin) without battery

PHYSICAL

(max. wire 2.5mm² / way) or M6 brass studs
Alarm connections| Plug in screw terminal block
Enclosure| Zinc plated & powder coated steel
Dimensions| 150W x 242D x 61H (±1mm)
Weight| 1.8 Kg

STANDARDS

MOUNTING DETAILS

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CUSTOMISED MODELS

low), temp. compensation, output voltage re- duction at over temperature
CSR151| SR250HL24TXL| 10m tempo lead
CSR165| SR250HL24TXLP-LAN+| Conformal coating
CSR215| SR250HL30XLPDC| Conformal coating and DIN clips with DC Input 110VDC/30VDC
CSR218| SR250HL24XLP| ‘DC OK’ LED off unless I>200mA, conformal coating, Vought =27V, when no input & I<200mA ‘Power OK’ LED flashes & ‘DC OK’ LED off.
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 TERMS OF WARRANTY

Helios Power Solutions warrants this product for 24 months from date of shipment against material and workmanship defects. Liability under this warranty is limited to the replacement or repair of the defective product as long as the product has not been damaged through misapplication, negligence, or unauthorized modification or repair.

New Zealand: sales@heliosps.co.nz
Australia: sales@heliosps.com.au
– Middle East & Asia:
sales@heliosps.asia 
www.heliosps.com

References

• Helios Power Solutions International - DC Solutions Partner
• SR Series - Downloads | Helios Power Solutions International
• SR Series - Downloads | Helios Power Solutions International
• SR Series - Downloads | Helios Power Solutions International

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