Omega Engineering OMR-6520, OMR-6510 Introduction, What is OMR ?, Outstanding Features of OMR

1.Introduction

1.1What is OMR ?

OMR is a series of data acquisition modules. It provides a total solution of the data acquisition network and control system. You can remotely control up to 256 OMR modules on RS-485 network. All you need is to use a host computer, like a PC (Personal Computer), with one RS-232 serial port for controlling the whole system. The maximum communication distance is 4000 feet from the host computer.

OMR is based on the RS-485 multi-drop network system, each module has a unique address ID. Using simple ASCII command & response protocol through standard RS-485 interface can control all the OMR modules in the RS-485 network.

The OMR modules provide direct linkage to a wide variety of sensors and perform all signal conditioning, scaling, linearization and conversion. The modules can be used to measure temperature, pressure, flow, voltage, current and numerous types of digital signals.

1.2Outstanding Features of OMR

∙Industry standard networking

All OMR modules use the RS-485 communication protocol for transmitting and receiving at high rates and over long distance.

∙Two-wire and multi-drop communication

A single twisted pair of wires is used to transmit and receive data between modules. Multi-drop capability makes system configuration more flexible and easy set-up of a network.

∙High transfer speed

OMR modules provide up to 115.2K bps data / command transfer rate. It can promote system bandwidth.

∙Simple command / response protocol

All communications are performed with printable ASCII characters. This allows the information to be processed with string functions common to the most high-level languages.

∙Industrial design

The screw terminal plug connectors on every OMR module ensure simple installation and easy modification. The compact size allows the modules to be mounted on DIN rail, back-panel wall-mount, etc.

∙Watch-dog supervisory

OMR contains a watch-dog supervisory circuitry that will automatically reset the module when the system fails. In addition, a user-programmable software timer provides a ‘safe’ output signal in the event of host computer failure.

∙High isolation voltage

OMR provides photo-isolators, which ensure high isolation voltage, between the data acquisition circuits and the communication port. The fatal electric-shock won‘t go through and damage all the modules on the network.

∙Noise immunity

The OMR provide extra noise immunity capability. An electrode, which is coated inside the ABS case, can reduce electro-magnetic interference (EMI) and noise.

∙Harsh environmental protection

Introduction 1-1