Installation guide

LMU-4200™ Hardware and Installation Guide

V1.0.9 November 13, 2010

- 8 - CalAmp Proprietary & Confidential

1.3.4 Expansion Interface

The expansion interface located on the back of the LMU-4200™ via the 16-in Molex

connector is used to extend I/O functions and provide serial access to the LMU-4200™. It

should only be used with CalAmp expansion harnesses. The available accessories are:

1.3.4.1 jPOD™ Vehicle Bus Adaptor

The CalAmp jPOD Adapter is a J1939 compliant device that reads the parameters broadcast

in the J1939 bus, processes them and provides filtered vehicle data to the LMU-4200™.

A script is written using a special software tool and loaded into the jPOD. This script defines

the specific parameters (PGNs/SPNs) to read, how to process them and how to send them

to the host. The script does not send any requests onto the bus.

Selected J1939 Parameters

 PGN SPN

Battery Potential / Power Input 1 65271 168

Engine Coolant Temperature 65262 110

Engine Speed RPM 61444 190

Vehicle Speed 65265 84

Accelerator Pedal Position % 61443 91

Brake Pedal Switch - On/Off 65265 597

Total Vehicle Distance 65248 245

Engine Total Fuel Used 65257 250

Diesel Particulate Filter Status 64892 3701

DM1 (Diag Msg 1 - active DTC’s) 65226