Mobeye CM-Guard TwinLog CML4055 – Voltage Alarm

Brand: Mobeye

 289,19 ( 239,00 excl. VAT)

The Mobeye CM-Guard TwinLog CML4055 is a compact instrument for monitoring analogue values. Its inputs are designed to measure voltages from 0 V to 48 V, with peaks of up to 64 V, making it ideal as a battery guard. The CML4055 offers complete insight into voltage trends and sends notifications in the event of deviations.

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Communication module

4G LTE-M, 2G Fallback

Inputs

2x NO/NC/AN inputs

Outputs

1x open collector (200mA)

Features

Piezo siren

Setting options

Option for silent or loud alarm

Power input

battery-operated (with option to connect 12-24 VDC)

Batteries

2x CR123 (lithium 3,0V) included

Enclosure

IP44

Dimensions

94 x 94 x 28 mm

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Description

Mobeye CM-Guard TwinLog CML4055 – 4G Voltage Monitor & Alarm

The Mobeye CM-Guard TwinLog CML4055 is a compact remote battery monitor designed for precise monitoring of analogue values, making it ideal for use as a battery guard. With two input channels measuring 0V to 48V, it excels as a 12V/24V battery monitor. When the voltage from a connected battery or sensor falls outside the preset limits, the device triggers a low voltage alarm and logs the measured values for easy access via the online portal. The CML4055 can run on battery power alone or with external power support, giving you flexibility across a range of applications — including off-grid and standby power monitoring.

Alarm Notifications and Logging

Mobeye CML4055 voltage alarm, battery guard in Mobeye AppWhen an alarm is triggered, the Mobeye CML4055 offers versatile notification options: app alerts (the Mobeye Messages App is available for iOS and Android), phone calls with voice messages, SMS, and email alerts. You can configure multiple contacts to receive customised alarm messages. As a voltage data logger, the CML4055 sends values periodically and after an alarm to the Mobeye Portal, where values are sent periodically and after an alarm, and displayed as clear tables and graphs.

The Mobeye CML4055 runs for over a year on a single set of batteries. When connected to an external power source (12–24V DC or mains), it also sends “power failure” notifications.

Flexible Inputs and Output Control

The CML4055 has two inputs suitable for analogue measurement (AN) as well as normally open (NO) or normally closed (NC) contacts. During an alarm, an internal piezo siren provides an audible warning. The device also features an open-collector output for controlling external devices.

Key Benefits

  • Deep discharge protection
  • Adjustable alarm threshold
  • Open-collector switching
  • Remote, real-time battery monitoring via 4G

4G Battery Monitoring System, Voltage Alarm, Battery Guard

The CML4055 is an efficient cellular battery monitor designed to prevent damage, with no reliance on Wi-Fi or a fixed internet connection. It detects deep discharge — a common cause of battery malfunction — by triggering alarms when voltage deviates from preset limits. Its open-collector output can also switch a battery or device off in response to critical conditions.

How the Mobeye CML4055 Works

how Mobeye CML4055 voltage alarm and battery guard worksThe CML4055 continuously monitors the voltage of a connected battery or analogue sensor, triggering an immediate alarm on any deviation and logging values at regular intervals.

  1. Connect a battery or analogue sensor to one of the inputs.
  2. Set the minimum and maximum analogue limits, log frequency, and contacts for notifications.
  3. If the voltage falls below or rises above the set thresholds, the CML4055 alerts your designated contacts. Voltage trends can be tracked online through tables and graphs.

Typical Applications for the Mobeye CM-Guard TwinLog CML4055

The Mobeye CML4055 is a versatile voltage monitoring and alarm system built for accurate unattended equipment monitoring of batteries and electrical systems. It delivers instant alerts when voltage falls outside safe ranges, helping prevent equipment failure and keep systems running reliably. Thanks to its remote monitoring capability, it suits a wide range of professional and private applications.

Common applications include:

  • Aggregates and generators – monitors battery voltage to ensure reliable power supply and acts as a backup for critical equipment monitoring
  • Rental equipment – lets companies track battery usage and maintain operational readiness
  • Boats and marine applications – gives boat owners confidence that batteries stay fully operational
  • Battery maintenance – helps prevent over-draining, reducing failure risk and extending battery lifespan

CML4055 – Technical data

Contents

  • CML4055
  • 2x CR123 batteries
  • SIM card

(Alarm) messages

  • voltage alarm, input alarm (NO/NC), power failure, alarm recovery, battery low voltage, (missed) test report
  • to private contacts via app, call, text message and/or email; local piezo siren

Reporting

  • voltage values, status, setting list, event history, network strength and position based on Cell ID

Setting options

  • analogue limits per sensor, log interval (in min.), interval for data synchronisation (in hours), contact persons (unlimited number) for alarm and service messages, message texts, repeat cycles, input type, recovery messages, alarm delay times, test interval (keep-alive), etc.

Operation

  • arming and disarming via button, time schedules and SMS

Inputs

  • 2x input, settable as analogue or NO/NC (potential-free)
    voltage values 0-48V with peak voltage up to 64V
  • 1x 12-24V DC (+/- 2V)

Output

  • open collector (at external voltage), max. 200mA. Switches in the event of an alarm or after incoming SMS/call

Power supply

  • 2x CR123 lithium batteries, or
  • 12-24V DC (regulated) + 2x CR123 lithium

Battery lifetime

  • > 1 year at normal use (battery operated)
  • > 3 years at normal use (powered externally)

Dimensions

  • 94 x 94 x 28 mm

Connectivity

  • 4G LTE-M + 2G EGSM Quad band

The Mobeye SIM card and Mobeye Portal provide full functionality and optimum security. The 4G LTE-M network is very reliable and ensures a strong penetration against low energy consumption. 2G is available as a fallback.

When using your own SIM card, the operation is “stand-alone” via 2G, without using the Mobeye Portal. The alarm notifications are sent via SMS and telephone call to (max.) 5 contacts. Programming is done via (simple) SMS commands.

Accessories (not included)

Mobeye SIM, Portal & App service

The Mobeye Portal offers a clear dashboard and essential functions, such as graphs and log values, history, status and position (Cell-Id), online programming, setting up the messages and push notifications per app. The ‘keep–alive’ monitor offers extra security by monitoring the receipt of test messages. You can activate the supplied Mobeye SIM card online.

Downloads

Click to open the documents and find more information:

SIM, Portal & App

All Mobeye monitoring devices require a SIM card for communication. The product comes with a budget-friendly SIM card, which provides direct access to the Mobeye Portal. Using your own SIM card limits certain functionalities.

SIM
The Mobeye M2M SIM card (low-cost, flat-fee, multi-provider) enables full functionality, allowing access to both the Mobeye Portal and the Mobeye App.

The Mobeye SIM card is PIN-protected and works exclusively in a Mobeye device. Do not insert it into any other device. For more information about the Mobeye SIM card, visit: mobeye.com/en/sim-cards. Details on the rates for using the Mobeye Portal and SIM card can be found at mobeye.com/en/sim-portal.

See also: How to insert a SIM card in your Mobeye device.

The Mobeye SIM card is included with the delivery and can be activated online via the Mobeye Portal. If the SIM card is missing, you can request a replacement free of charge. Please complete the contact form and provide the device model and your address details.

Free App for your Smartphone
The Mobeye Messages app is available for download from both the Google Play Store (Android) and the Apple App Store (iOS).

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