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9/28/23, 4:30 PM
LMU™ Serial Adapter
or
LMU Serial Cable (Part Number 134364-MDT-SER)
The 134364-MDT Serial Cable has the same features as the 134364 product listed above except the MDT serial cable has an extra feature that allows power voltage
adjustment.
LMU™ Serial Adapter
NOTE: CalAmp previously used the following serial cables. The following two cables are no longer in production. However, these legacy cables are still compatible with
LMU-5541™. Part Number 134364-SER has effectively replaced Part Number 133337-5 while Part Number 134364-MDT has replaced Part Number 133564-1. The
description for the legacy cables are listed below.
Serial Combo Adapter (Part Number 133337-5)
The Serial Combo Adapter is designed to allow laptops, and PDAs to communicate with the LMU-5541™ via a direct serial connection. While using this cable, the LMU-
5541™ will accept AT Commands and act as a modem. No setup of the LMU-5541™ is necessary to use this cable.
Serial Combo Adapter (Part Number 133564-1)
The Serial Combo Adapter is designed to allow laptops, MDTs, barcode readers and other devices to communicate with the LMU-5541™ via a direct serial connection.
While using this cable, the LMU-5541™ will accept AT Commands and act as a modem. No setup of the LMU-5541™ is necessary to use this cable. The 133564-1 also
has switched power capabilities which allow for power to the serial device to be regulated. This cable will allow 'dumb' serial devices to use the LMU-5541™ to pass
data to/from a remote application. In general, when in MDT mode, the LMU-5541™ will package any data received over the serial port into a 'User Message' and send it
to its inbound address. Any User Messages received from the remote application that have an appropriate Message Type will be passed from the LMU-5541™ to the
dumb serial device. The setup of this mode is controlled by S130 - 139 and is described in detail later in this document.
4.5 Accessories
See the Harness Diagrams page for more information on LMU accessories, and supported products table. Do NOT connect multiple power supplies or multiple grounds to
the LMU-5541 and JPod2. Connecting multiple power supplies or multiple grounds may lead to excessive current draw through the LMU and JPod2.
4.6 RF Connector
LMU-5541™ uses an SMA connector with a 50 Ω impedance.
4.7 I/O Descriptions
The LMU-5541™ provides the following inputs and outputs (I/O):
Digital Inputs
Input 0: Ignition Sense (Always biased low)
Input 1: Generic Digital Input (Biased high or low/ S-158 Bit 1)
Input 2: Generic Digital Input (Biased high or low/ S-158 Bit 2)
Input 3: Generic Digital Input (Biased high or low/ S-158 Bit 3)
Input 4: Generic Digital Input (Biased high or low/ S-158 Bit 4)
Input 5: Generic Digital Input (Biased high or low/ S-158 Bit 5)
Input 6: Generic Digital Input (Biased high or low/ S-158 Bit 6)
Input 7: Generic Digital Input (Biased high or low/ S-158 Bit 7)
Input 8: Motion Sensor (low = No motion, high = motion)
Input 9: Reserved
Input 10: Power State (low = external power, high = internal battery)
Input 11: Vbatt Low
Analog to Digital Inputs
A/D 0: External Power Supply Monitor
A/D 1: External A/D Input (From Power Connector)
A/D 2: External A/D Input (From 22 Pin I/O Conenctor)
A/D 3: External A/D Input (From 22 Pin I/O Conenctor)
A/D 4: External A/D Input (From 22 Pin I/O Conenctor)
A/D 5: External A/D Input (From 22 Pin I/O Conenctor)
A/D 6: Internal Battery Voltage
A/D 7: GPS Antenna Voltage
Outputs
Output 0: Standard Open Collector Relay Output
Output 1: Standard Open Collector Relay Output
https://puls.calamp.com/wiki/LMU-5541_Hardware_%26_Installation_Guide
LMU-5541 Hardware & Installation Guide - PULS Wiki
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