Intellitec’s Battery Isolator Relay Delay/E offers a low cost,
reliable approach to charging multiple batteries. Unlike diode
isolators, this system provides an 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 auxiliary
battery on the alternator. The unit is available in both 12 and
24 volt versions.
The unit is fully encapsulated in a plastic enclosure for
mounting in the engine compartment with two screws. It
operates in combination with a conventional continuous duty
cycle isolator relay that has been used by a number of
vehicle manufacturers. There are three (3) wires to connect
to the delay unit: one from an ignition switched 12 volt
source, a ground and the isolator relay coil.
It operates by sensing the voltage on the main 12 volt
system. When this voltage goes above 13.3 volts for
approximately 12 seconds, as happens when the engine
is running normally (normal alternator output voltage is
approximately 14.4 volts), it will close the isolator relay
providing charging current to the auxiliary battery. When
the ignition switch is turned off, the relay will open
immediately.
If the voltage should drop below 12.0 volts for more than two
seconds while the engine is running, the relay will drop out.
This might happen when the alternator is not able to supply
sufficient current to all the loads and charge the auxiliary
battery.
When the main battery voltage rises above 13.3 volts again,
the relay will again close in about 2 seconds to retry charging
the auxiliary battery. The resultant flicker of the lights will alert
the driver of the system overload.
How It Works
The Isolator Relay Delay senses the voltage on the main
battery of a multiple battery system, and supplies power to
the coil of an isolator relay when the voltage on the main
battery rises above 13.3 volts (26.6 volts on 24 volt system).
If the voltage falls below 12.0 volts (24 volts on 24 volt
system) the unit will
stop supplying current to the isolator relay, preventing the
load of the auxiliary battery from stopping the engine.
Specifications
12 volt
Part Number:
00-00629-120
Maximum Continuous Carry Current:
10 Amps Max.
Maximum Ambient Temperature:
185 Degrees F.
Minimum Ambient Temperature: -
40 Degrees F.
IRD/E with Cont. Duty Solenoid:
00-00629-512
24 volt
Part Number:
00-00629-240
Maximum Continuous Carry Current:
10 Amps Max.
Maximum Ambient Temperature:
185 Degrees F.
Minimum Ambient Temperature: -
40 Degrees F.
IRD/E with Cont. Duty Solenoid:
00-00629-524
