User Manual

Asset-Link 250 User Manual July 19, 2004

970-00047 Rev. 1.2

3.3 Relay Driver Specifications

These output pins are designed to operate an automotive relay similar to Bosch

Automotive relay, type VF4-45F11-S01, or electrical equivalent.

The relay coil positive is to be connected to the vehicle positive through a fused

connection, and an integral flyback diode on the relay coil is recommended.

The relay coil negative is to be connected to these relay driver outputs, which will

give a low impedance to “Ground” when activated.

3.4 Analog to Digital Converter Inputs

The four ADC input lines are high impedance to “Ground”. Analog Inputs are input

to the FCP through the PIC I/O processors built in 10-bit A-D (analog to digital)

converter, which reads a voltage, this value is available when there is greater than 8V

available to the Asset-Link .

3.5 PIC Serial Data Output

This I/O line is a high impedance output with a logic voltage coming from the Asset-

Link . Serial Output is controlled by the FCP, which gives either a “logic high” or a

“logic low” that is available when there is a greater than 8V available to the Asset-

Link .

3.6 PIC Serial Data Input

This I/O line is a high impedance input with a logic voltage coming from the device

supplying the Asset-Link with serial data. Serial Input is monitored by the FCP, when

there is a Power Supply available to the Asset-Link and it is either in the Active or

Full Power mode.