Digital pressure switch can be configured on site
A
Baumer Group product story
Edited by the Engineeringtalk editorial team
Jun 29, 2001
Bourdon Sedeme's new TED50 is a rugged, programmable digital pressure switch which can be configured in situ for triggering point and much more using an integral, sealed keypad
Bourdon Sedeme introduces the TED50, a rugged, programmable digital pressure switch for controlling pressures in industrial processes.
Accurate to +/-0.5% at 20C, it is able to measure absolute pressure in the ranges 0 to 1 bar and 0 to 40 bar, or relative pressure and vacuum in the ranges -1 to 0 bar and 0 to 400 bar.
With its built-in microprocessor, the TED50 can be configured in situ using the integral, sealed keypad to provide five different operating functions: Triggering point at two independent thresholds; hysteresis value of each adjustable threshold; threshold active state for alarm configuration; zero setting; parameter self-test and protection of settings with a four digit code.
The breaking capacity of the micro-switches is 400mA without polarity at 60V DC or 40V AC, and optional 4-20mA analogue and RS 485 digital outputs enable the switch to operate in a variety of modes.
A clear four-digit LED display also gives a visual indication of the fluid pressure.
Current trials include MODBUS protocol, with PROFIBUS PA and other industry standard protocols planned for the future.
The TED50 can operate on an unregulated power supply of between 18 and 24V DC, and it is protected against polarity reversal.
Power consumption is 20mA at 24 V.
Voltage free CMOS contacts are used, rather than the pnp contacts found on some other pressure switches.
The TED50 is CE marked and meets European standards for electromagnetic compatibility in terms of immunity and emissions.
Electrical connection is by an M12, 8-contact connector as standard or an optional M23 8+1 contact connector.
Hydraulic connection is by a G 1/2 connector as standard or a range of options including G 1/4 DIN 16288, G 1/4 DIN 3852 and 1/4 NPT.
A flush diaphragm for viscous fluids is also available if required, as are various hygienic connections for the food, beverage and pharmaceutical industry (Tri-Clamp, DIN, SMS etc.) The standard fluid seal is NBR (nitrile), and a range of options is also available to suit the application, including EPDM, Kalrez and FKM (Viton).
It has a wide operating temperature range and can handle ambient temperatures from -10C to 85C and process fluid temperatures from-20C to 100C.
Thermal drift is just +/-0.015% of the measurement range per degree.
With its rugged stainless steel construction, an ingress protection rating of IP65 and high resistance to vibration and shock, the TED50 can withstand the harshest industrial environments.
The TED50 joins the Bourdon, Haenni and Kamstrup high-performance range of pressure, temperature, force and acceleration switches and sensors.
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