Charge Guard
Intelligent Split Charging Battery Management
AVSPC10 12V 70 AMP
AVSPC20 24V 50 AMP
INTELLIGENT SPLIT CHARGE UNIT
VOLTAGE CONTROLLED RELAY
These units are ideally suited to 12V or 24V vehicles where “under bonnet” space is at a premium. They come complete with a 3M mounting pad.
It senses when the engine is running and allows the charge through to the auxiliary battery, when the engine is switched off it will monitor the voltage coming from the starting battery. When the voltage drops to 12.6V (AVSPC10) or 25.2V (AVSPC20) the unit will separate and isolate the batteries, guaranteeing sufficient power in the starting battery to start the vehicle when the voltage has dropped to a predetermined level.
The unit now has a one minute timer built in to eliminate damaging relay chatter caused by a flat auxiliary battery putting too much strain on the unit.
AVSP10 Technical Specifications
| Type | Operating Voltage | Pin Configuration |
|---|---|---|
| 12 Volt 70 Amp | 13.4V to 12.6V | 1 + main (starting) battery 2 + auxilliary battery 3 – ground |
AVSP20 Technical Specifications
| Type | Operating Voltage | Pin Configuration |
|---|---|---|
| 24 Volt 50 Amp | 26.8V to 25.2V | 1 + main (starting) battery |
AVSPC11 12V 70 AMP
AVSPC21 24V 50 AMP
INTELLIGENT SPLIT CHARGE UNIT
IGNITION CONTROLLED RELAY
Newly launched are the AVSPC11 and AVSPC21.
These units are exactly the same specification as AVSPC10 and AVSPC20 however they have flying leads for earth and ignition.
These units do not rely on the switching voltages, instead they are activated when the ignition is on and they charge the auxiliary battery. When the ignition is switched off, the unit will separate and isolate the batteries.
AVSPC11 Technical Specifications
| Type | Operating Voltage | Pin Configuration |
|---|---|---|
| 12 Volt 70 Amp | 13.4V to 12.6V | 1 + main (starting) battery 2 + auxilliary battery 3 – ground |
AVSPC21 Technical Specifications
| Type | Operating Voltage | Pin Configuration |
|---|---|---|
| 24 Volt 50 Amp | 26.8V to 25.2V | 1 + main (starting) battery 2 + auxilliary battery 3 – ground |
AVSPC12 12V 200 AMP
AVSPC24 24V 100 AMP
VOLTAGE SENSING SPLIT CHARGE DEVICE
How It Works
When the engine is running, the Charge Guard senses the voltage and allows the charge through to the auxiliary battery. When the engine is switched off, the Charge Guard monitors the voltage from the starting battery into the unit. When the voltage drops to 12.5V (AVSPC12) or 25.4V (AVSPC24) the unit will separate and isolate both batteries. This means that equipment powered form auxiliary batteries cannot drain the starting battery.
Why You Need One
With today’s engine management systems and “intelligent” alternators you cannot use the charging light on the dash as a switch, also you cannot jump start most new vehicles without the danger of damaging the engine ECU. This unit then becomes cost-effective.
Who Uses Them
Emergency vehicles where battery drain is a problem. Utility and council vehicles where multiple beacons/work lamps or power tools are being charged.
The unit also has a one minute timer built in to eliminate damaging relay chatter caused by a flat auxiliary battery putting too much strain on the unit.
AVSPC12 Technical Specifications
| Rating Amps | Size | Studs Size | Quiescent Current | Switching Voltages |
|---|---|---|---|---|
| 200A | 120 x 80 x 70mm | M8 | >1mA | 13.4V to 12.5V |
AVSPC24 Technical Specifications
| Rating Amps | Size | Studs Size | Quiescent Current | Switching Voltages |
|---|---|---|---|---|
| 100A | 120 x 80 x 70mm | M8 | >1mA | 27.0V to 25.4V |
AVSPC12(2W) 12V 200 AMP
AVSPC24(2W) 24V 100 AMP
INTELLIGENT SPLIT CHARGE UNIT IGNITION CONTROLLED RELAY
These units are exactly the same specification as AVSPC12 and AVSPC24 however they have flying leads for earth and ignition.
These units do not rely on the switching voltages, instead they are activated when the ignition is on and they charge the auxiliary battery. When the ignition is switched off, the unit will separate and isolate the batteries.
AVSPC12(2W) Technical Specifications
| Rating Amps | Size | Studs Size | Quiescent Current | Switching Voltages |
|---|---|---|---|---|
| 200A | 120 x 80 x 70mm | M8 | >1mA | 13.4V to 12.5V |
AVSPC24(2W) Technical Specifications
| Rating Amps | Size | Studs Size | Quiescent Current | Switching Voltages |
|---|---|---|---|---|
| 100A | 120 x 80 x 70mm | M8 | >1mA | 27.0V to 25.4V |
AVSPC12P 12V 200 AMP
AVSPC24P 24V 100 AMP
PROGRAMMABLE VOLTAGE SENSING SPLIT CHARGE DEVICE
How It Works
This unit works by sensing the input voltage from the main battery and turning on the output if this voltage is above a predefined level (see program details).
This will allow the auxiliary battery to be charged attached to the output of the unit.
If the voltage drops below a predefined level the unit turns off its output if the voltage stays below that level for a predefined duration of time. If the override wire (green) is connected to positive voltage (battery positive) under the dropout voltage the unit will turn on the output.
The unit can be reprogrammed to 9 different modes (please see program details).
AVSPC12P Technical Specifications
| Rating Amps | Size | Studs Size | Quiescent Current | Switching Voltages |
|---|---|---|---|---|
| 200A | 120 x 84 x 71mm | M8 | >1mA | 13.4V to 12.5V |
AVSPC24P Technical Specifications
| Rating Amps | Size | Studs Size | Quiescent Current | Switching Voltages |
|---|---|---|---|---|
| 100A | 120 x 84 x 71mm | M8 | >1mA | 27.0V to 25.4V |
AVSPC400A 12V 400 AMP
400 AMP VOLTAGE SENSING SPLIT CHARGE DEVICE
This unit is the latest in the range of Charge Guards. It is designed for vehicles where extra equipment is being fitted on upgrade, i.e. ambulances and emergency vehicles.
The AVSPC12 may have been adequate for original fitting but with the addition of upgraded equipment it is putting too much strain on the Charge Guard.
The 400 amp version can cope with virtually all split charging requirements.
It is ideally suited for vehicles such as breakdown vehicles where there is a high requirement for power to run tyre changing machinery.
The relay is a double latching relay which draws zero current in either mode.
