Computronic Controls SM82A datasheet
COMPUTRONIC CONTROLS
SM82(A) Switchmode Range of
Automatic Battery Chargers
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FEATURES:
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High Rate Float Charging
5A @ 6/12 - 3A @ 24V - 1.5A @ 48V
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VRLA and Vented Lead Acid
Low Ripple (<1%)
Auto 3 Stage Operation
Or Optional Manual Boost Mode
Full LED Output Indication
This battery charger is designed for
Use with Lead Acid or VRLA battery packs.
Safety
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Batteries can be dangerous, do not place metallic
objects across the terminals of a battery or battery
pack. When handling batteries remove all loose
jewellery, watches and rings. Take care not to place
tools across the terminals. Only specified types of
batteries should be used with this unit as charging
others may cause damage and result in serious injury.
Before using this unit, ensure the following: Unit is physically checked, in event of any damage to
unit please return to supplier.
AC Voltage is correctly selected where appropriate.
Read and follow the “How To Use” guidelines in this
instruction document.
It is recommended that when using the SM82 battery
charger, the battery packs should be at ambient
temperature (20deg C) before starting charge.
Consult Table (A) to determine whether to use float
mode (with manual boost option) or Auto-3 Stage
mode.
Table (A) - Charging mode selection guide
Nominal
VDC
6/12
24
48
Standing Load
(Continous Current)
ADC
<350mA
>350mA
<200mA
>200mA
<100mA
>100mA
Float, bulk and charge fail outputs
Current Limited
Charge Fail / Loss of AC Relay
Product Specification
Power Supply:
Nominal operating voltages
Nominal operating frequency
DC Charge Output:
Output current ADC
5
5
Nominal voltage VDC
6
12
Line regulation
< 1%
Load regulation
< 1%
Output ripple
< 1%
Charging settings
Float VDC
Boost VDC
Note: Auto-3 Stage Operation is controlled by output current of the charger, this
determines whether charger goes into an increased 'boost' voltage mode,
continous charging at this voltage causes gassing of batteries and shortens
both AH capacity and life, having a continous (standing load) above this level
whilst in the Auto-3 Stage Mode will cause the charger to be in a continous
'boost' mode.
6.9
7.2
13.8
14.5
3
1.5
24
48
27.6
29.0
55.4
58.0
Charge Fail Relay Output:
Relay type
Mode Of Operation Best
Suited
Auto-3 Stage
Float
Auto-3 Stage
Float
Auto-3 Stage
Float
95-135 and 195-277VAC
(switchable)
50/60Hz
Contact rating
Volt free SPDT contacts
relay de-energises on fault
1A @ 30VDC
General:
operating temperature
overall dimensions (w x h x d)
weight
EMC emmision / immunity
Warranty
-20°C to +60°C
134mm x 140mm x 85mm
(5.3” x 5.5” x 3.6”)
0.56Kg (1.24lbs)
EN 58801-2 / EN50082-2
A one year limited warranty on materials and workmanship is
given with this product. Details are available upon request.
Connections & Controls
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Notes on Charging mode selector and boost operation:
With both the charging stage mode selector jumpers fitted
uppermost (M) on (7), the unit will function in the float mode,
providing a constant voltage output (at specified level as
shown on page 1), an increased ‘boost’ voltage can be
manually triggered by linking the Boost Terminals (4). Fitting
both jumpers towards (A) on (7) will put the charger in Auto3 Stage mode.
Note: Care should be taken when using the manual boost
mode so overcharge does not take place, the boost link
should be timed or monitored until battery voltage reaches
required level.
WARNING! Continuous boost charging will damage the
batteries
Charge Fail / Loss of AC
Supply Relay Output
(1)
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Factory default units are shipped with Jumper (7) fitted
in M position for Float mode, Jumper (8) fitted for 12V
setting and Jumper (9) selected for 240VAC.
How to Use
Ensure correct AC Input Voltage input is selected on the charger (9)
If using the 6/12V switchable model, ensure the 6/12V Voltage Selector (8) is configured correctly, (ON for 12V, OFF for 6V)
Connect AC supply to terminals (2) observing connection details, and plug into the mains, switch the mains on and check the
battery charged (float) LED (4) illuminates (if connected), then switch off at mains.
Ensure that the battery pack is either Vented or VRLA (sealed) rechargeable lead acid only. Confirm the correct charging stage
to be used from Table (A) on page 1 and connect mode selector jumper (7) to suit as described above.
Table (B) -Typical charging characteristics (in float mode)
100% Charged
Voltage
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Current
Battery Knee Point
(Float Voltage)
80% Charged
Connect the +Ve and -Ve terminals (4) to battery/battery pack
I M P O R TA N T: C H E C K P O L A R I T Y O F B AT T E RY
CONNECTIONS REVERSE POLARITY WILL DAMAGE
BATTERIES
In Auto-3 Stage Mode of Operation (with LED’s Connected):
Switch on at mains, ‘Boost’ LED (4) should now be illuminated.
When the battery pack is fully charged the ‘Float’ LED (4)
should be illuminated and the ‘Boost’ LED (4) should switch off.
Once fully charged the battery packs will receive a float charge
at specified voltage on Page 1, keeping batteries in prime
condition ready for use.
Before disconnecting the battery pack from charger, switch of at
mains, disconnect battery pack and then disconnect charging
leads from charger.
In Float Mode of Operation:
As above, only the Float LED (4) will be permanently
illuminated.
Notes: If no AC is present and the unit is connected to a battery, then the C/F LED (2) will be illuminated. The SM82 charger
draws 20mA from battery(s) when connected with no AC present. With AC present and no battery/load connected the Float LED
(2) will also be illuminated. All the LED outputs are configured for 2.5VDC LED’s, no voltage drop down resistor is required.
When using the charger in the Auto 3 Stage mode, either neither of LED’s should be connected or both the Float and Boost
LED’s must be connected for them to function correctly, if only 1 of the LED’s are connected they will not function correctly.
ENSURE CONNECTION OF LED’S IS CORRECT BEFORE SWITCHING ON UNIT - INCORRECT CONNECTION MAY
DAMAGE THE CHARGERS LED OUTPUT CONTROLLER
Computronic Controls Ltd
.
41 – 46 Railway Terrace
Nechells, Birmingham, B7 5NG
United Kingdom
Tel: +44 121 327 8500
Fax: +44 121 327 8501
email: sales@computroniccontrols.com
web: www.computroniccontrols.com
CCL - Instructions for use with SM82(A) Battery Charger - Issue2 - July 2007
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