Simple and Compact Pressure Measurement from Beckoff

The Beckhoff Bus Terminal system is being expanded by the new pressure measuring terminals, KM37xx for recording differential and absolute pressures. In a similar way to electrical signal acquisition, pressure measurement is carried out using a “standard” Bus Terminal with a width of 24 mm. The compact housing and simple connection system support a space-saving and rapid installation. Beckoff claims that additional measuring instruments are not necessary.

The pressure measuring terminals record direct differential and absolute pressures and change the measured pressure into an electrical signal. This 16-bit value is available to the higher level controller independent of the fieldbus. The pressure measuring terminals have quick release mechanisms for connecting the measuring hoses. Standard commercial plastic hoses can be used as the measuring hoses. In addition to measuring, the Bus Terminals also execute other functions such as temperature compensation and avoidance of long-term drift.

Three different pressure measuring terminals are available:

KM3701: The 1-channel differential pressure measuring terminal measures pressure differences up to an ambient pressure of 7,000 hPa (7 bar) between points

KM3702: The 2-channel absolute pressure measuring terminal records pressure values between 0 and 7,000 hPa (7 bar) at each hose connector.

KM3712: The 2-channel absolute pressure measuring terminal records negative pressure values between -1,000 hPa (-1 bar) and 0 hPa at each hose connector.