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9/28/23, 4:30 PM
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
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-5541s™
Update and change the configuration of one or more LMU-5541s™
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
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 materials in the vicinity of ESD sensitive electronics, all conductive materials are grounded, workers are
https://puls.calamp.com/wiki/LMU-5541_Hardware_%26_Installation_Guide
LMU-5541 Hardware & Installation Guide - PULS Wiki
LMU Manager Users
Guide.
LM Direct Reference Guide
for details.
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