Isolator Relay Delay (IRD)

In many cases split charging between two banks of batteries is expected to work by simply splitting the batteries with a relay. This simply will not work as the alternator will charge the battery with the greater resistance, which is the battery with the highest charge and more often than not is the one that does not need charging. To efficiently charge two banks of batteries, time and voltage parameters need to be considered in the design of the system The Intellitec Isolator Relay Delay ( I.R.D) does just this and prioritises the alternator output to the chassis battery. When the chassis battery is clearly holding its own against the loads, the IRD ECU will charge both batteries. Key Features •Fully Potted ECU •Easy Installation •12 & 24 volt •ECU Can Be Used to Control Existing Systems Intellitec`s Isolator Relay Delay (IRD) offers a low cost, reliable approach to charging multiple batteries. Unlike diode isolators, the IRD provides the engine driven alternator with the opportunity to begin charging the main battery before connecting the auxiliary battery. This allows the use of self exciting alternators and lets the engine briefly warm up prior to placing the load of a heavily discharged battery on the alternator. The IRD ECU is fully potted in a plastic enclosure for mounting in the engine compartment. The ECU operates in conjunction with the Intellitec Silver Can relay. There are just three connections to be made; one from an ignition switched source; an earth; and the last being the relay coil. The IRD senses the voltage on the main battery of a 12 / 24v system. When this voltage goes above 13.3 / 26.6 volts for 12 secounds, the IRD ECU will close the isolator relay, providing charging current to the aux battery. When the ignition is off, the relay opens immediately. Should the voltage on the main battery drop below 12 / 24 volts for two secounds whilst the engine is running, the relay will drop out, prioritising charging current to the main battery. Part No's. K20 12V Isolator Relay Delay K21 24V Isolator Relay Delay

For more information on Isolator Relay Delay (IRD) talk to Intellitec MV Ltd