LMU3640MB-HRZLG-G1000

CalAmp LMU-3640MB — LTE Cat-M1 Advanced Fleet Telematics Gateway with Integrated Vehicle Diagnostics

The CalAmp LMU-3640MB is a robust, highly expandable LTE Cat-M1 vehicle telematics gateway designed for advanced fleet management, commercial vehicle tracking, driver monitoring, vehicle diagnostics, fleet security, sensor integration, and enterprise IoT applications. Unlike simpler GPS trackers, the LMU-3640MB combines LTE Cat-M1 connectivity, high-sensitivity GNSS, built-in light- and heavy-duty vehicle-bus support, Bluetooth Low Energy 5.0, extensive digital and analog I/O, dual serial interfaces, 1-Wire connectivity, programmable PEG™ edge intelligence, and an internal backup battery in a single platform. (CalAmp)

A key advantage of the LMU-3640MB is its integrated vehicle diagnostics capability. The device supports both heavy-duty protocols such as SAE J1939 and J1708 and light-duty vehicle protocols including J1850 PWM, J1850 VPW, SW-CAN, ISO 9141-2, KWP2000, and ISO 15765 CAN. Combined with extensive I/O and peripheral interfaces, this allows the LMU-3640MB to function as a comprehensive vehicle-data gateway rather than simply a GPS location device. (CalAmp)

Advanced GNSS Vehicle Location

The LMU-3640MB incorporates a 55-channel hybrid GPS/GLONASS/SBAS GNSS engine supporting WAAS, EGNOS, and MSAS satellite-based augmentation systems. CalAmp specifies approximately 2.0-meter CEP open-sky positioning accuracy under its stated 24-hour static SBAS test conditions. (CalAmp)

GNSS tracking sensitivity is specified at -162 dBm, with acquisition sensitivity of -156 dBm for hot starts and -148 dBm for cold starts. Position updates are supported at rates of up to 4 Hz, and the platform supports Assisted GPS (AGPS) location assistance. (CalAmp)

These capabilities make the LMU-3640MB suitable for applications involving real-time fleet visibility, vehicle history, route monitoring, geofencing, fleet utilization, theft recovery, dispatch operations, and event-driven telematics reporting.

Global LTE Cat-M1 Cellular Connectivity

The LMU-3640MB provides broad LTE Cat-M1 cellular connectivity for professional fleet and IoT deployments.

CalAmp specifies LTE Cat-M1 operation across:

B1 / B2 / B3 / B4 / B5 / B8 / B12 / B13 / B18 / B19 / B20 / B25 / B26 / B28 / B39. (CalAmp)

The global variant also supports GSM/GPRS 850/900/1800/1900 MHz, providing additional connectivity options in regions where compatible legacy service remains available. (CalAmp)

Supported communications include:

• SMS

• UDP packet data

• TCP (CalAmp)

The cellular antenna is integrated internally, helping simplify installation and eliminate the need for an external cellular antenna assembly.

Integrated Light-Duty Vehicle Diagnostics

One of the defining capabilities of the LMU-3640MB is its built-in support for multiple light-duty vehicle data protocols.

CalAmp specifies support for:

• J1850 PWM

• J1850 VPW

• SW-CAN

• ISO 9141-2

• KWP2000

• ISO 15765 CAN (CalAmp)

This integrated vehicle-bus capability gives compatible telematics applications access to vehicle diagnostic and operational information without requiring the LMU-3640MB to function solely as a location tracker.

The device uses a dedicated 16-pin, 3 mm-pitch vehicle BUS interface, separate from its 24-pin power and general-purpose I/O connector. (CalAmp)

Heavy-Duty J1939 & J1708 Vehicle Support

The LMU-3640MB is not limited to passenger and light-commercial vehicles. CalAmp also specifies support for the SAE J1939 and J1708 heavy-duty vehicle data standards. (CalAmp)

This significantly expands the potential application range of the device and makes it appropriate for fleets containing a mixture of vehicle types.

J1939 and J1708 support can be particularly useful for compatible commercial trucks, vocational vehicles, buses, and other heavy-duty fleet platforms, while the light-duty protocols provide integration options for passenger vehicles, vans, pickups, and other fleet assets.

The ability to support both categories from the same telematics platform can simplify hardware standardization for organizations managing diverse fleets.

Comprehensive 24-Pin Vehicle I/O

The LMU-3640MB provides extensive general-purpose vehicle I/O through a dedicated 24-pin, 3 mm-pitch connector. (CalAmp)

The device provides:

• 1 fixed-bias ignition input

• 4 configurable digital inputs

• 3 digital outputs

• 2 analog inputs

• 2 serial interfaces

• 1 1-Wire® interface

• 1 switched VIN output

• 2 switched 3.3 V outputs (CalAmp)

The four digital inputs support selectable high- or low-bias operation over 0–30 VDC, while the three digital outputs use an open-collector architecture rated at 150 mA. Two external ADC inputs provide analog signal monitoring. (CalAmp)

This extensive I/O architecture allows appropriately engineered installations to integrate the LMU-3640MB with ignition circuits, switches, relays, sensors, alarms, driver-identification hardware, temperature sensors, and other vehicle equipment.

Dual Serial Interfaces — TTL & RS-232

The LMU-3640MB provides two serial interfaces:

• 1 TTL serial interface

• 1 RS-232 serial interface (CalAmp)

This is an important advantage for specialized fleet and telematics installations because serial connectivity allows compatible third-party equipment and peripherals to communicate directly with the telematics gateway.

The inclusion of a true RS-232 interface also makes the LMU-3640MB particularly useful for applications involving legacy or specialized fleet hardware that already communicates using conventional serial protocols.

1-Wire® Driver Identification & Temperature Sensing

A dedicated 1-Wire® interface provides another method of connecting compatible peripherals.

CalAmp specifically identifies the interface for:

• Driver identification

• Temperature sensing (CalAmp)

Driver identification can allow fleet-management systems to associate vehicle activity with individual operators, while temperature sensing can support specialized applications involving cargo, service vehicles, or other temperature-sensitive fleet operations.

Bluetooth Low Energy 5.0

The LMU-3640MB is Bluetooth Low Energy 5.0 capable and incorporates an internal BLE antenna. (CalAmp)

CalAmp positions the platform within a gateway-and-tag ecosystem, allowing purpose-built tags and sensors to be integrated for applications such as monitoring cargo location while in transit. (CalAmp)

BLE therefore provides an additional wireless expansion path beyond the LMU-3640MB's wired digital, analog, serial, vehicle-bus, and 1-Wire interfaces.

For suitable applications, the vehicle-mounted LMU-3640MB can function as the cellular gateway between nearby BLE-enabled devices and remote telematics infrastructure.

Advanced Driver Behavior & Motion Detection

The LMU-3640MB incorporates a built-in three-axis accelerometer supporting:

• Driver-behavior monitoring

• Impact detection

• Motion sensing

• Tilt detection (CalAmp)

CalAmp highlights driver-monitoring applications including speeding, accident detection, extreme braking, and cornering. (CalAmp)

When accelerometer information is combined with GNSS position, vehicle-bus data, and programmable edge intelligence, fleet applications can associate significant vehicle events with location and operating information.

Remote Safety Lockout & Vehicle Security

CalAmp specifically identifies remote safety lockout as an LMU-3640MB application, including the ability to disable vehicles or equipment and remotely support theft detection and stolen-vehicle recovery. (CalAmp)

The LMU-3640MB's digital outputs can therefore be incorporated into an appropriately engineered vehicle-control or security architecture.

Combined with GNSS tracking, ignition monitoring, motion detection, vehicle-bus information, and internal backup power, this capability can provide an additional layer of functionality for fleet-security applications.

Any remote immobilization implementation should be professionally engineered for the specific vehicle and deployed with appropriate operational and safety controls.

PEG™ Programmable Edge Intelligence

The LMU-3640MB incorporates CalAmp's PEG™ edge intelligence, allowing device functionality to be updated and new edge applications to be developed. (CalAmp)

Rather than requiring every decision to be processed by a remote server, edge intelligence allows supported conditions and events to be evaluated directly by the telematics gateway.

Application logic can potentially incorporate information from the device's GNSS receiver, ignition state, vehicle bus, digital inputs, analog inputs, accelerometer, serial interfaces, and connected peripherals.

This approach can improve event response while reducing unnecessary cellular communications by allowing the gateway to transmit information according to defined operating conditions and business rules.

Internal Backup Battery

The LMU-3640MB supports an internal Lithium-Ion backup battery with capacity up to 1000 mAh. CalAmp highlights the battery as providing additional assurance against interference or loss of primary vehicle power. (CalAmp)

The battery's specified charging-temperature range is:

0°C to +45°C

CalAmp specifies device operation from:

• -30°C to +60°C when connected to primary power

• -10°C to +60°C when operating on the internal battery

• -20°C to +25°C for up to six months for long-term storage with the battery (CalAmp)

The backup battery is particularly useful for fleet-security applications where continued device operation following disconnection of primary vehicle power can provide additional visibility.

Low-Power Vehicle Operation

Despite its extensive cellular, GNSS, vehicle-bus, Bluetooth, I/O, and processing capabilities, the LMU-3640MB provides power-management modes intended to minimize impact on the vehicle battery.

CalAmp specifies typical power consumption of:

• 600 µA at 12 V in deep sleep

• 15 mA at 12 V during radio-active sleep

• 90 mA at 12 V during active tracking with GPS and cellular enabled (CalAmp)

Deep-sleep functionality is particularly important for commercial fleet vehicles that may remain parked for extended periods.

12/24-Volt Vehicle Electrical Architecture

The LMU-3640MB is designed for both 12 V and 24 VDC vehicle electrical systems.

CalAmp specifies:

• 9–30 VDC during startup and normal operation

• 7–32 VDC for momentary operation (CalAmp)

This broad electrical range allows the same telematics platform to address many passenger, light-commercial, medium-duty, and heavy-duty fleet applications.

Flexible Installation Options

CalAmp offers multiple installation approaches for the LMU-3640MB, including:

• Hardwired installation

• OBD-II installation with optional adapter

• Cigarette-lighter power harness (CalAmp)

This gives fleet operators and telematics integrators flexibility when standardizing the device across different vehicle classes and deployment requirements.

Internal Cellular, GNSS & BLE Antennas

The LMU-3640MB incorporates internal cellular, GNSS, and BLE antennas. (CalAmp)

Internal antennas simplify installation by eliminating the need to route separate antenna cables throughout the vehicle. This can reduce installation time and make the device easier to conceal in fleet applications.

The internal-antenna architecture is also the primary physical distinction between the LMU-3640MB and the related LMU-3641MB, which CalAmp identifies as its external-antenna variant. (CalAmp)

Four Integrated Status Indicators

The LMU-3640MB provides four status LEDs for:

• GPS

• Cellular

• VBUS

• LAN (CalAmp)

These indicators provide installers and technicians with immediate diagnostic information during installation, commissioning, and troubleshooting.

Physical Design

The current CalAmp product page specifies dimensions of approximately:

5.7 × 2.1 × 1.3 inches
145 × 53 × 33 mm

Weight is approximately:

5 oz / 142 g with the 1000 mAh battery. (CalAmp)

The device provides separate interfaces for vehicle diagnostics and general-purpose connectivity:

• 16-pin, 3 mm-pitch vehicle BUS interface

• 24-pin, 3 mm-pitch power/I/O interface

• Internal 2FF SIM (CalAmp)

This dual-connector architecture reflects the LMU-3640MB's role as a sophisticated vehicle telematics gateway rather than a simple three-wire GPS tracker.

Fleet-Grade Environmental Design

The LMU-3640MB is designed for professional in-vehicle telematics applications.

CalAmp specifies:

• -30°C to +60°C operation on primary power

• -10°C to +60°C operation on internal battery

• 85% relative humidity at 50°C, non-condensing

• Shock and vibration referenced to U.S. Military Standard 202G

• ESD performance to IEC 61000-4-2 at 4 kV

• Load-dump protection referenced to SAE J1455 (CalAmp)

These specifications support deployment in commercial fleet environments where vibration, temperature variation, and automotive electrical transients are routine operating considerations.

CalAmp iOn Remote Device Management

The LMU-3640MB supports CalAmp iOn, which CalAmp identifies for remotely:

• Monitoring devices

• Managing devices

• Upgrading firmware

• Configuring devices

• Troubleshooting deployed hardware (CalAmp)

Remote device management can be especially valuable for large commercial fleets because routine configuration and firmware tasks can be performed without physically accessing every installed telematics unit.

CalAmp notes that applicable cloud and software services require a subscription.

CalAmp Telematics Cloud & RESTful API Integration

The LMU-3640MB also supports CalAmp Telematics Cloud, with device-data streaming available through RESTful APIs. (CalAmp)

This provides a path for integrating LMU-3640MB telematics information into proprietary fleet-management platforms, reporting systems, enterprise applications, and third-party services.

For solution providers, the REST API architecture makes the LMU-3640MB particularly useful where CalAmp hardware needs to become part of a broader custom telematics ecosystem.

Regulatory & Industry Certifications

CalAmp lists the LMU-3640MB with the following industry certifications:

• FCC

• IC

• CE

• PTCRB

• RoHS

• Bluetooth SIG

• RCM (CalAmp)

Certification and network compatibility should still be confirmed against the exact regional SKU and carrier requirements for a specific deployment.

Key Technical Features

• Global LTE Cat-M1 cellular connectivity

• LTE bands B1/B2/B3/B4/B5/B8/B12/B13/B18/B19/B20/B25/B26/B28/B39

• GSM/GPRS 850/900/1800/1900 MHz support

• SMS, UDP packet data, and TCP communications

• 55-channel hybrid GPS/GLONASS/SBAS GNSS receiver

• WAAS, EGNOS, and MSAS augmentation

• Approximately 2.0 m CEP open-sky positioning accuracy

• -162 dBm GNSS tracking sensitivity

• -156 dBm hot-start acquisition sensitivity

• -148 dBm cold-start acquisition sensitivity

• Up to 4 Hz location updates

• Assisted GPS support

• Internal cellular, GNSS, and BLE antennas

• Bluetooth Low Energy 5.0

• Built-in light-duty vehicle diagnostics

• J1850 PWM

• J1850 VPW

• SW-CAN

• ISO 9141-2

• KWP2000

• ISO 15765 CAN

• Heavy-duty SAE J1939

• Heavy-duty J1708

• One fixed-bias ignition input

• Four configurable 0–30 VDC digital inputs

• Three 150 mA open-collector digital outputs

• Two external ADC analog inputs

• One TTL serial interface

• One RS-232 serial interface

• One 1-Wire® interface for driver ID/temperature sensing

• One switched VIN output

• Two switched 3.3 V outputs

• Built-in three-axis accelerometer

• Driver-behavior monitoring

• Impact detection

• Motion sensing

• Tilt detection

• Integrated vehicle diagnostics

• Remote safety-lockout support for appropriately engineered installations

• PEG™ programmable edge intelligence

• Internal Lithium-Ion backup battery up to 1000 mAh

• Typical deep-sleep consumption of approximately 600 µA at 12 V

• 12/24 VDC vehicle compatibility

• 9–30 VDC startup and normal operating range

• 7–32 VDC momentary operating range

• 16-pin vehicle-bus interface

• 24-pin power/I/O interface

• Internal 2FF SIM

• Four GPS/cellular/VBUS/LAN status LEDs

• Dimensions: 145 × 53 × 33 mm

• Weight: approximately 142 g / 5 oz with 1000 mAh battery

• Primary-power operating temperature: -30°C to +60°C

• CalAmp iOn remote management

• CalAmp Telematics Cloud integration

• RESTful API device-data streaming

• FCC, IC, CE, PTCRB, RoHS, BT SIG, and RCM certifications (CalAmp)

Ideal Applications

The CalAmp LMU-3640MB is particularly well suited for commercial fleet tracking, passenger and light-commercial vehicles, medium- and heavy-duty fleets, service and delivery vehicles, mixed fleets, driver-behavior monitoring, vehicle diagnostics, fleet utilization, vehicle security, stolen-vehicle recovery, sensor integration, cargo monitoring, temperature monitoring, driver identification, and enterprise telematics deployments.

Its combination of LTE Cat-M1 connectivity, high-sensitivity GNSS, integrated light- and heavy-duty vehicle diagnostics, J1939/J1708 support, extensive 24-pin I/O, dual analog inputs, TTL and RS-232 serial connectivity, 1-Wire, BLE 5.0, three-axis motion sensing, PEG edge intelligence, and up to a 1000 mAh internal backup battery makes the LMU-3640MB particularly appropriate for applications requiring a true vehicle-data and telematics gateway rather than a basic GPS tracker. CalAmp describes the platform as a robust telematics gateway built for dynamic flexibility. (CalAmp)

CalAmp LMU-3640MB — Official Product Specifications

Official CalAmp LMU-3640MB Specification Sheet (PDF)

 

SKU DESCRIPTION: LMU3640, CAT M, BG96 GPS, BLE, 1000 MAH BATT, RS232, BUZZER, LOAD DUMP, INT ANT, DM-CTC, GEN-HW