Home > CalAmp > CalAmp LMU-5541 Telematics Router Installation Guide

CalAmp LMU-5541 Telematics Router Installation Guide

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LMU-5541 Hardware & Installation Guide - PULS Wiki

grounded, and charge build-up on ESD sensitive electronics is prevented. International standards are used to define typical EPA and can be obtained for example

from International Electro-technical Commission (IEC) or American National Standards Institute (ANSI).

This ESD classification of the sub assembly will be defined for the most sensitive component, therefore the following classifications apply:

Class 1B – Human Model (< 1 kV)

Class M1 – Machine Model (< 100V)

When handling the LMU-5541’s™ main-board (i.e. sub assembly) by itself or in a partial housing proper ESD precautions should be taken. The handler should be

in an ESD safe area and be properly grounded.

WARNING: This product can expose you to chemicals including carbon black, nickel, & bisphenol A, which are known to the State of California to cause

cancer and birth defects or other reproductive harm. For more information go to https://www.P65Warnings.ca.gov.

GPS Ceramic Patch Handling

When handling the sub assembly it may be natural to pick it up by sides and make contact with the antenna boards. In an uncontrolled ESD environment contact

with the center pin of ceramic patch antenna can create a path for electrostatic discharge directly to the GPS Module. The GPS Module is very sensitive to ESD and

can be damaged and rendered non-functional at low levels of ESD.

One should avoid contact with the center pin of the patch during handling.

Packaging

Anytime the sub assembly is shipped and it is not fully packaged in its final housing it must be sealed in an ESD safe bag.

Electrical Over-Stress (EOS)

The GPS receiver can be damaged if exposed to an RF level that exceeds its maximum input rating. Such exposure can happen if a nearby source transmits an RF

signal at sufficiently high level to cause damage.

Storage and Shipping

One potential source of EOS is proximity of one LMU-5541™ GPS Antenna to another LMU-5541™ GSM Antenna. Should one of the units be in a transmit mode

the potential exists for the other unit to become damaged. Therefore any LMU-5541™ GPS Antenna should be kept at least four inches apart from any active LMU-

5541™ GSM Antenna or any other active high power RF transmitter with power greater than 1 Watt.

3.1.2 Battery Back-up devices

Please properly dispose of the battery in any of the CalAmp products that utilize one, do not just throw used batteries, replaced batteries, or units containing a back-

up battery into the trash. Consult your local waste management facility for proper disposal instructions.

3.1.3 Environmental Specifications

The LMU-5541™ is designed to operate in environments typically encountered by fleet vehicles, including wide temperature extremes, voltage transients, and

potential interference from other vehicle equipment.

To ensure proper operation in such an environment, the LMU-5541™ was subjected to standard tests defined by the Society of Automotive Engineers (SAE). The

specific tests included temperature, shock, vibration, and EMI/EMC. These tests were performed by independent labs and documented in a detailed test report. In

accordance with Appendix A of SAE J1113 Part 1, the Unit is considered a “Functional Status Class B, Performance Region II” system that requires Threat Level 3

Testing.

The following shows the environmental conditions the LMU is designed to operate in and the relevant SAE tests that were performed. No formal altitude tests were

conducted.

Dimensions

5.75”(L) x 4.0”(W) x 1.2”(H)

146mm (L) x 102mm (W) x 40mm (H)

Weight

8oz (227g)

Temperature

-30° C to 60° C (connected to primary power)

-10° C to 60° C (operating on internal battery)

-20° C to 25° C ≤ 6 months (long term storage with battery)

Humidity

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