Simurelay vs PLC Simulator & Automation Lab

Simurelay is a simulator to help you design electromechanical systems and simulate them. It allows to make many electrical diagrams by using the available basic components such as relays, switches, buttons, contactors, timers, motors...

Build real industrial automation circuits — on your iPhone or iPad. PLCForge is a complete automation lab: drag components, wire them up, run the simulation and watch motors spin, contactors latch and lamps light up. Tap the PLC and program it in ladder logic, just like the real thing. REALISTIC SIMULATION • 35+ industrial components: buttons, contactors, relays, timers, counters, three-phase motors, VFD, servo drives, conveyor, pneumatic cylinder, tank, stack light, industrial oven and more • Realistic power chain: motors need all three phases, contactor coils need A1+A2, DC polarity matters, and a short circuit trips the fuse, breaker or thermal relay • Fault injection: create shorts and open circuits on purpose and learn to diagnose like a professional LADDER PROGRAMMING • Full ladder editor inside the PLC: NO/NC contacts, coils, SET/RESET, TON/TOF timers, CTU/CTD counters, comparison, MOV and more • Real I/O: wire buttons and sensors to the inputs, drive contactors and motors from the outputs LEARN FROM SCRATCH • Training Center with 16 interactive lessons — from your first control circuit to servo motion control • Guided 24-step course: from the seal-in circuit all the way to ladder logic • 16 challenges of rising difficulty + 14 real-world problems • Built-in reference guide for every component, with every terminal explained SHARE YOUR WORK • Export and import projects (.plcforge) and share them with classmates • Export your panel as PNG or PDF Perfect for electrical and automation students, technicians, electricians and hobbyists. No hardware needed — learn PLC hands-on, anywhere. Works fully offline. The core components and lessons are free; a single one-time purchase unlocks everything.