Omniflex - Device provides isolation and surge protection

Typically high risk areas that are vulnerable to surges need both isolation and surge protection which requires two devices fitted to the field loop - the new LZ series combines both functions with in a single 22.5mm wide package.

The OMNITERM LZI and LZD are current loop interface modules designed to interface field mounted transmitters in remote applications where signal isolation and surge protection is required Applications include interfacing for RTU's, PLC's etc.
The LZI is a single channel device with additional flexibility and support for both 2-wire and 4-wire 4-20mA transmitters. The LZD is a dual channel device for increased packing density, suitable for multiple 2-wire transmitters.

The Omniterm LZI and LZD both include the following features:

* A fully specified 10kA 8/20µSec Nominal surge arrestor to prevent electrical surges induced on the field wiring from damaging sensitive equipment in the panel
* 1500Vac isolation from input to output so that ground loops cannot occur, that might otherwise affect instrument accuracy.
* A stable 24Vdc field power supply to power two-wire transmitters from lower voltage sources such as 12V battery systems without compromising available loop voltage or loop resistance.
* A precision 250 ohm resistor allowing 4-20mA to be converted conveniently into 1-5V signals for RTU's and PLC's.

Combining the surge arrestor, isolator and 250 ohm termination into a single module, saves significant cost, engineering time and panel space in monitoring applications. These surge arrestors/ isolator combos simplify RTU and field interface panel design.

Reliability figures in accordance with IEC61508 (SIL1) are available to allow inclusion of these devices in safety systems.

These modules utilize advanced electronic techniques to achieve high accuracy and low power consumption with zero field calibration, saving you installation and commissioning time.

The OMNITERM LZB is a dual input field contact interface module designed to protect RTU and PLC installations from external factors such as lightning surges, ground loops and wiring faults. This module includes a fully specified surge arrestor and a high side output driver allowing you to combine all these functions into a single module.