Rev 1.3 22.07.09
Dingo Reference Manual
11
NO
BOOST
V
T
S-
B- L- S+ B+ L+
Generator
Remote
Start Unit
G relay switches a larger relay
Intermediate Relay
Fig. 2C - Generator start wiring with an
intermediate relay.
2
This direct connection will work if the current
flowing through the remote start terminals is less
than 300mA. If the current is greater than this,
then it will be necessary to use an intermediate
relay with a higher contact current rating. The G
relay switches the intermediate relay which in turn
switches the remote start terminal. The wiring for
this is shown in fig 2C.
Chose a relay with a contact current rating suitable
for the remote start unit and a coil voltage which
is the same as the system voltage. The relay
coil should not draw more than 300mA when it
is energised. Be careful with automotive relays
because they can often be poor relays requiring
large coil currents. Use relays from the electronics
industry which generally have lower drive power.
The G relay terminals do not need a catch diode
across the relay coil to protect from the flyback
voltage. This protection is built into the G terminal.
It can be difficult to determine what current is
required to operate the remote start. The best way
to do this is to measure it. Short the remote start
terminals with a multimeter on its current range
and measure the current.
The manufacturer’s manual should contain this
information but often does not.
The generator control provided by the Dingo is
simple -a contact closure is provided when the
generator should run and the contacts open when
the generator should be stopped. It does not handle
the issues associated with starting such as fuel and
what to do if the generator does not start. This
should be handled by the remote start unit.
