Overview

In response to the need for modern monitoring and control systems in thermal power plants, the

Net IR-S infrared flame detector combines the proven IR-S type flame detector, which has been successfully installed in many power plants, with Mitsubishi Electric’s DIASYS Netmation control system.

The result is a flame detector product that can be used as a burner control system.

The Net IR-S has the same sensor unit as the conventional IR-S sensor and can be used with any of the following fuels: fuel oil, coal and natural gas.

In addition, the excellent detection reliability, maintainability and cost effectiveness of the IR-S sensor are maintained.

In addition, the decision circuitry is built as a module of DIASYS Netmation. It is used in conjunction with the upper layers of the Netmation to provide an easy-to-use interface.

The panel of the Net IR-S can be designed as a stand-alone flame detector system independent of the burner control system.

If you replace a conventional flame detector with this new flame detector, you can reuse your existing equipment.

Features

Highly sensitive design

High sensitivity to flame intensity enables stable www.cniacs.com detection of burner flames. Flames are detected through unlit areas.

Extended detection range

With 100 times the dynamic range of conventional products, this sensor enables stable detection of flames from slow burning to high intensity. No sensitivity adjustment of the sensor is required in the field.

Maintenance-free

A ball lens is used to eliminate the need to clean the sensor window during normal boiler operation.

Long Life Sensor

No periodic replacement is required due to the use of long-life infrared semiconductor sensor elements.

Reduced number of panels

The detector unit is compact and utilizes a space-saving design that allows one panel to contain 40 corners.

Reuse of existing boiler facilities

The boiler itself does not need to be worked on when the flame detector is replaced.

Reuse of cables    

There is no need to replace the cable between the sensor and the panel. (When UV type detection is used in an existing system)

System Configuration

Flame detector panel

OVERVIEW

The IR-S type infrared flame detector is an excellent high sensitivity type that excels in “detection reliability”, “maintainability” and “economy”.

It supports boiler fuel diversity and low NOx (nitrogen oxide) operation.

By detecting the “average value” and “variation” of the infrared intensity of the burner flame light transmitted to the infrared sensor (semiconductor element) via a light guide (optical fiber), the detector can distinguish between the flame and the light due to the furnace.

The detector distinguishes between flame and infrared light due to the red heat of the furnace wall and detects flame fluctuations in the burner’s ignition zone.

The IR-S type infrared flame detector has low brightness flame detection sensitivity and a wide dynamic range, so it can be used for a variety of fuels such as natural gas, heavy oil, and coal.

Features

High sensitivity design

High sensitivity to flame intensity enables www.cniacs.com stable detection of burner flames. Flame is detected through unlit areas.

Extended detection range

With 100 times the dynamic range of conventional products, this sensor enables stable detection of flames from slow burning to high intensity. No sensitivity adjustment of the sensor is required in the field.

Easy Maintenance

A spherical lens is used to eliminate the need to clean the sensor window during normal boiler operation.

Long Life Sensor

No periodic replacement is required due to the use of long-life infrared semiconductor sensor elements.

Fewer panels

The detector unit is compact and features a space-saving design that allows one panel to cover up to 40 corners.

System Configuration

Flame Detector Panel

Flame detector main unit

Mitsubishi PLC RJ71C24-R4 is a Mitsubishi iQ-R series network module (serial communication module) with 2-channel RS-422/485 interface.

RJ71C24-R4 Network Module (Serial Communication Module)

Product Details

【Interface

CH1:RS-422/485 standard (two-piece plug-in terminal block) CH2:RS-422/485 standard (two-piece plug-in terminal block)

Communication mode

Line: full-duplex communication/half-duplex communication

mc protocol communication: half-duplex communication

Communication protocol communication: full-duplex communication/half-duplex communication

Non-sequential protocol communication: Full-duplex communication/half-duplex communication

Bidirectional protocol communication: full-duplex communication/half-duplex communication

MC protocol communication: 1 request is processed during END processing of the CPU module of the C24 installation station.

Communication protocol communication:While sending and receiving. When a request is executed by a dedicated instruction (CPRTCL instruction).

Non-sequential/bidirectional protocol communication: Each request for transmission is executed at the time of transmission, and reception can be performed at any time.

[Connection line configuration (target device side: CPU module side)].

RS-422/485: 1:1. 1:n, n:1. m:n

[Data communication line configuration (target device side: CPU module side)]]

RS-422/485.

-MC protocol communication: 1:1. 1:n, m:n

Communication protocol communication: 1:1. n:1

Unordered protocol:1:1. 1:n, n:1

Bidirectional protocol communication: 1:1

Transmission distance (total long distance)] RS-422/485: Max. 1200m

Number of input/output points]: 32 points (I/0 allocation: intelligent 32 points)

External wiring connector] 9-pin D-sub (male) bolt-on type

DC5V internal current consumption] 0.42A

Dimensions H*W*D[mm]] 106*27.8*110Weight] 0.13kg