The 40T 72 PID is a 72x36 microprocessor based controller, manufactured with SMT.
The instrument has an operator interface protected by a lexan®membrane, which provides an IP65 front face protection.
It is made up of 3 keys, a 4-digit display and 3 indication LEDs. Different sensors can be connected to the input of the variable to be controlled:

• Thermocouples type J, K, R, S, T, B, E, N.
• 3-wire PT100 resistance thermometer.
• PTC thermistor.
• 0…60mV, 12…60mV, 0…20mA, 4...20mA, 0...10V, 2...10V linear signals.

The selection of the sensor is made from keyboard and through the proper input contact. No external matching shunt is required.
Instruments are equipped with 3 relays (5A, 250Vac, cosφ=1) or static (6V/20mA) outputs, which can be used as controls (heat, cool or heat/cool not without overlap) and/or as alarm.
A triac output is also available (as an alternative to two relay outputs) to control directly resistive loads up to a max. of 2A by 240V.
The programming of the instrument is made easy by grouping the parameters in function blocks (CFG for control parameters, Inp for inputs, Out for outputs) and by a simplified data entry menu.
The configuration can be simplified even further using the PC programming kit made up of a connection cable and a menu guide program that runs under Windows (see technical data code 80020). A configurable personal software protection code (password protection) can be used to restrict the levels of editing and displaying the configuration parameters