8/18/2021
LMU-2600 Hardware & Installation Guide - PULS Wiki
https://puls.calamp.com/wiki/LMU-2600_Hardware_%26_Installation_Guide
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The LMU’s outputs are designed to drive external relays. These outputs provide a high-current, open-collector
driver that can sink up to 150 mA each. These drivers may be used to drive external relays that can then
control vehicle functions such as door locks, fuel shut-off valves, sirens and lights. If additional current is
required to drive the relays, external circuitry can be added to source the current. This diagram is a typical use
of an output to drive a relay.
Sample Relay Wiring
3.4.4 Status LEDs
The LMU-2600™ is equipped with two Status LEDs, one for GPS and one for COMM (wireless network
status). The LEDs use the following blink patterns to indicate service:
LED #1 (Comm LED - Orange) Definitions
Condition
LED 1
Modem Off
Off
Comm On - Searching
Slow Blinking
Network Available
Fast Blinking
Registered but no Inbound Acknowledgement
Alternates from Solid to Fast Blink every 1s
Registered and Received Inbound Acknowledgement Solid
LED #2 (GPS LED - Yellow) Definitions
Condition
LED 1
GPS Off
Off
GPS On
Slow Blinking
GPS Time Sync Fast Blinking
GPS Fix
Solid