Category: Automation

Industrial automation, control circuits, sensors, relays, contactors, motor control.

PLC Input Stays ON After the Sensor Turns OFF

PLC Input Flickers or Drops Out Intermittently: How to Find the Cause

4–20 mA Loop Reads 0 mA, 3.6 mA or 22 mA: What It Means

How to Scale a 4–20 mA Signal in Siemens TIA Portal

24V DC Power Supply Voltage Drops Under Load: Causes and Tests

Contactor Coil Has Voltage but Will Not Pull In

How to Test a Three-Phase Motor With a Multimeter and Megger

Single Phasing in Three-Phase Motors: Symptoms, Causes and Tests

Three-Phase Motor Runs but Has Low Torque Under Load

VFD Has a Run Command but the Motor Does Not Start