MOL25T – MOL500T

MHZ BROADBAND OPTICAL LINK (ISOLATED PROBE)

The perfect tool for precise, real-time measurements, when electric isolation is needed, such as in high-voltage environment or for floating voltage potential measurements

Unsurpassed immunity to electromagnetic fields

> 40 hours autonomy on batteries (standby >10 days)

Battery powered point-to-point modules, or up to 10 slot chassis with plugin modules

Optical fiber cable provides total galvanic isolation

Remotely selectable attenuation

These fiber-optic transmission systems are designed for high-quality transmission of analog signals from DC up to 25 MHz, respectively 500 MHz, over optical fibers.

They are perfect tools for precise, real-time measurements when electric isolation is needed, for instance, in a high-voltage environment or for floating voltage potential measurements.

The compact, highly shielded electro-optical conversion module is particularly well suited for use in hardly accessible locations when larger measurement equipment (e.g., an oscilloscope) cannot be placed close to the measurement point.

In the point-to-point version, both the optical transmitter and receiver modules are battery-powered, providing flexibility in their use. In the point-to-frame version, the plug-in receiver modules are inserted in a 1- or 10-slot frame and are powered from the frame, ensuring continuous operation.

The MOL25T and the MOL500T have remotely selectable 1:1, 1:10, or 1:100 input attenuation.

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FAQ

The MHz Broadband Optical Link (Isolated Probe) is an optically isolated measurement solution designed to safely capture and transmit electrical signals from environments where direct electrical connections are not possible or safe. The signal is acquired by an isolated probe transmitter, converted to optical, and transmitted through fiber optic cable to a receiver connected to standard measurement equipment.

A differential probe measures the voltage difference between two points but still shares a common reference with the measurement system and may be affected by ground loops. An isolated probe provides complete galvanic isolation between the measurement point and the equipment via fiber optics, eliminating any conductive path and allowing safe measurements on floating potentials, high-voltage systems, or electrically noisy environments.

An isolated optical probe is ideal when measurements must be performed on floating potentials, high-voltage systems, or electrically noisy environments, including monitoring signals inside high-voltage systems, measuring control or switching signals in power electronics, recording fast electrical transients, and performing measurements during EMC immunity testing.

Montena’s isolated optical link family supports from DC up to tens or hundreds of megahertz, depending on the model:

MOL25T — DC to 25 MHz, high impedance input only
MOL500T — DC to 500 MHz, high impedance or 50 ohm input

Key features include compact electro-optical transmitter modules, battery-powered operation for flexible deployment (more than 40 hours of autonomy), high immunity to electromagnetic disturbances, and fiber-optic transmission over long distances. These allow measurement instruments to be placed far from the test environment while ensuring reliable and safe signal acquisition.