Hardware Overview - CalAmp LMU-5541 Hardware Installation Manual

something meaningful with that information. This could include displaying the vehicle location on a map, performing an address look-up,
providing real-time driving directions, updating the vehicles ETA, monitoring vehicle and driver status or dispatching the vehicle to its next
pick up.
These functions, of course, are completely dependent on the capabilities of the vehicle management application. The role of the CalAmp LMU-
5541™ is to deliver the location information when and where it is needed.
A typical fleet management system based on a CalAmp device includes the following components:
A wireless data network
An LMU-5541™
Host Device (GPS NMEA only)
An LM Direct™ communications server
Backend mapping and reporting software which typically includes mapping and fleet reporting functions
PULS™
LMU Manager™
1.3 About CalAmp
LMU-5541 Hardware & Installation Guide
Basic System Architecture
2.2 Component Descriptions
2.2.1 Wireless Data Network
The Wireless Data Network provides the information bridge between the LM Direct™ server and the LMU-5541™. Wireless data networks can
take a variety of forms, such as cellular networks, satellite systems or local
area networks. Contact the CalAmp sales team for the networks available to the LMU-5541™.
2.2.2 LMU-5541™
The LMU-5541™ is responsible for delivering the location and status information when and where it is needed. Data requests mainly come from
the following sources:
PEG™ script within the LMU-5541™
A location or status request from the LM Direct™ server
A location or status request from LMU Manager
An SMS request made from a mobile device such as a customer's cell-phone
In some cases, it is necessary to run an application in the vehicle while it is being tracked by the backend software. Such examples could include
instant messaging between vehicles or a central office, in-vehicle mapping or
driving directions, email or database access. In most of these cases you will be using the LMU-5541™ as a wireless modem as well as a vehicle-
location device.
2.2.3 LM Direct™ Server
LM Direct™ is a CalAmp proprietary message interface specification detailing the various messages and their contents the LMU-5541™ is
capable of sending and receiving. This interface allows System Integrators to
communicate directly with LMU-5541's™. Please refer to the LM Direct Reference Guide for details.
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2.2.4 Backend Software
Backend software is a customer provided software application. Regardless of its purpose, one of its primary functions is to parse and present data
obtained from the LM Direct™ server. This allows the application to do any
of the following:
Display location database on reports received from the LMU-5541™ in a variety of formats Present
historic information received from the LMU-5541™, typically in a report/chart style format
Request location updates from one or more LMU-5530s™
Update and change the configuration of one or more LMU-5530s™
2.2.5 PULS™
PULS™ (Programming, Update and Logistics System) is CalAmp's web-based maintenance server offering out-of-the-box hands free
configuration and automatic post-installation upgrades. PULS™ provides a means for
configuration parameters, PEG scripts, and firmware to be updated Over-The-Air (OTA) and allows CalAmp customers to monitor unit health
status across your customers' fleets to quickly identify issues before they
become expensive problems.
2.2.6 LMU Manager™
LMU Manager is the primary configuration tool in the CalAmp system. It allows access to almost every feature available to the LMU-5541™.
Unlike the backend software, it has the option of talking directly to an
LMU-5541™ or making a request forwarded by the LM Direct™ server.
For further details on using LMU Manager, please refer to the LMU Manager Users Guide.

3 Hardware Overview

3.1 Location Messaging Unit-LMU-5541™
3.1.1 LMU-5541™ Handling Precautions
Electrostatic Discharge (ESD)
Electrostatic discharge (ESD) is the sudden and momentary electric current that flows between two objects at different electrical potentials caused
by direct contact or induced by an electrostatic field. The term is usually
used in the electronics and other industries to describe momentary unwanted currents that may cause damage to electronic equipment.
ESD Handling Precautions
ESD prevention is based on establishing an Electrostatic Protective Area (EPA). The EPA can be a small working station or a large
manufacturing area. The main principle of an EPA is that there are no highly charging