Installation Guide

Document Version: 11 19 | P a g e

8 Starter Interrupt

The MiX 4000 requires an external relay for the interruption of the vehicle’s starter circuit. The relay required

should be adequately rated for the purpose intended. Please note that a 30A or 40A (contact rating) relay

should be selected. A standard 5 PIN automotive relay manufactured by a reputable supplier (e.g. Bosch)

would be adequate. The correct relay operating voltage is required; failure to do so may damage the relay.

24V relays will not function correctly in 12V applications and 12V relays will be damaged when used at 24V.

To connect the relay, it only needs to be plugged into the relay socket on the Main Harness. The two 2mm²

black wires represent the two sides of the relay contacts that are controlled via the driver ID Plug. Cut the

wires as short as possible, where higher current will be interrupted via the relay.

Also use a cable-tie to secure the relay through the mounting ear (5mm hole) to the main harness, or where

possible an M5 lock-nut and bolt is to be used to secure the relay to the vehicle. Ensure that the relay wires

have enough play on them not to strain the relay terminal crimps connecting the relay to the wires.

It is not necessary to use a relay with a build in protective diode, because the MiX 4000 has built-in protection

already. Positive drive/relay outputs are protected against shorts to ground and battery positive and the

system can detect these faults. See simplified connection diagram below: