TX40 power connector

The TX40 has a power connector located on the back of the device:

Pin Connection
IGN

Ignition sense

The Ignition sense line needs to be high in order for the TX40 to boot up. It can be connected to the +VE terminal if using a power supply.

+ Positive (+VE)
- Negative (-VE)

See Connect power for information on connecting power to the device.