3 Ground Ground Black Ground
4 TX Transmit Data Blue Input to LMU
5 RX Receive Data Green Output From LMU
Serial Interface Connector
Users should only use CalAmp approved serial adapters for these connections.
3.2.4 Serial Interface Cables & Accessories
Serial Connectivity is a one cable solution,you can use either part numbers 134364-SER or 134364-MDT
LMU Serial Cable (Part Number 134364-SER)
This is the standard serial cable used with most LMU products.
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
LMU-5541 Hardware & Installation Guide
10/49
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.
3.2.5 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.
3.3 GPS Receiver
Location Technology 55 Channel
Enhancement Technology Hybrid GPS, GLONASS, SBAS Engine (WAAS, EGNOS, MSAS)
~2.0m CEP Open Sky (SBAS 24 hours static)
-167 dBm
-156 dBm (hot start)
-148 dBm (cold start)
3 sec @ -130 dBm
Location Accuracy
Tracking Sensitivity
Acquisition Sensitivity
AGPS capable
3.4 RF Connector
LMU-5541™ uses an SMA connector with a 50 Ω impedance.
3.5 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)
LMU-5541 Hardware & Installation Guide
11/49
Input 9: Reserved
Input 10: Power State (low = external power, high = internal battery)
