How to Wire a Sensor to PLC: NPN vs PNP
Sensor to PLC wiring: NPN/PNP, 2/3-wire, analog 4-20 mA.
Articles
Useful articles, reviews and technical solutions
Level Sensors: Tanks, Wells, Vessels
Level sensors: float, ultrasonic, hydrostatic. Selection and PLC connection.
Setup of INVT VFD PID and Sleep Mode for Pumps
Step-by-step guide for the practical configuration of INVT variable frequency drives (Goodrive GD10, GD20, GD2...
Optical Sensors: Principles and Applications
Optical sensors: retro-reflective, diffuse, through-beam. Principles, selection, wiring.
INVT GD20, GD10, GD200A VFD Errors: Diagnostic & IGBT Test
Emergency faults on INVT VFDs such as OUT, OV, UV, or OL trigger drive shutdown to protect the electrical comp...
Proximity Sensors: Capacitive, Inductive, Optical
Comparison of inductive, capacitive, and optical proximity sensors for industrial use.
INVT GD10, GD20, and GD200A VFD Setup & Wiring Guide
Comprehensive setup and wiring guide for INVT VFDs of GD10, GD20, and GD200A series. Covers motor parameter en...
Siemens LOGO! 9: New Logic Relay Review 2026
Siemens LOGO! 9 is the new generation of logic relays for simple automation, presented in April 2026. Compared...
