PLC, Motors and Sensors

These tools support control panels and instrumentation. Run a ladder program in the simulator, scale a 4-20 mA signal, convert PT100 resistance or thermocouple millivolts to temperature, and find the NEMA types that suit an environment. The motor pages give torque from power and speed, synchronous speed from frequency and poles, and the force and speed of a linear actuator.

Tools in this group

4-20mA Calculator: 4 to 20 mA Scaling — Enter the transmitter range and a current to get the process value, or a value to get the current, with percent and loop voltage.
Linear Actuator Calculator — Enter the load, angle, friction and stroke time to get the force, speed and power an actuator needs, and the screw torque.
Motor Torque Calculator — Enter motor power and speed to get the torque in N·m and lb·ft, or work back from torque, current or a gearbox ratio.
NEMA Enclosure Rating Chart — Tick what the enclosure must withstand to find the NEMA types that fit, or look up any NEMA type and its minimum IP rating.
PLC Simulator (Ladder Logic) — Write or pick a ladder program, switch the inputs and watch the rungs energise, timers run and outputs change, all in your browser.
Pneumatic Cylinder Force Calculator — Enter the bore, rod diameter and air pressure to get the force on the extend and retract strokes.
PT100 Table and RTD Calculator — Convert between temperature and resistance for Pt100 and Pt1000 sensors, see the tolerance class band, and print a table.
Stepper Motor Calculator — Enter the step angle and microstepping to get steps per revolution, pulse rate, speed and linear travel.
Synchronous Motor Speed Formula and Calculator — Enter the supply frequency and the number of poles to get the synchronous speed, slip, or the drive frequency for a target speed.
Thermocouple Table and mV Calculator — Convert thermocouple millivolts to temperature and back for any standard type, with cold junction compensation and a printable table.