3BHE024747R0101 Interface module using the tutorial

3BHE024747R0101 Interface module using the tutorial

The Single Channel Control Card provides the necessary power supplies to the associated sensor and conditions the incoming sensor signal. The received sensor signal is then processed by the microprocessor and the resultant value and any necessary alarm action, depending on the channel configuration, is carried out. The channel card front panel can be subdivided into five areas: Display Label and Cover. LCD Display. Alarm LEDs. Reset/Select Push-button. Extraction Slot.The LCD provides a display of the connected sensor reading and its status, or if maintenance is being carried out on the sensor, information on the sensor set points and calibration data. The display can be divided into four parts: Analogue Display. Message Display Digital Display. Icon Display.

Analogue Display 

This consists of 25 segments providing an indication of the sensor gas reading in the form of an analogue bar graph which covers the sensor range between -10% and +110% fsd. There are two possible modes of operation: a. Solid in which the segments fill the area between zero and the actual gas reading. b. Single Line in which a single segment indicates the actual gas reading. Each of these modes can be operated as either a rising or falling display. A peak reading facility is available which maintains a segment at the highest, or lowest, gas value obtained by the sensor since the previous peak reading reset. This is a useful recording tool for the behaviour of the connected sensor.

Digital Display

 The digital display is a four character, seven segment display which provides either an indication of the sensor gas reading or a value relating to a function selected from the Engineering Card. Depending on the sensor range and the configuration setting, the digital display shows a gas value to either no decimal place (the default setting) or to one decimal place. The default mode of operation is solid current gas reading display with a peak reading facility.

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