Le scénario
A 24 VDC safety relay circuit holds in a hydraulic press directional valve only while the E-stop chain is closed and reset is pressed; it drops out on any E-stop or loss of control power.
Ce que contient ce dessin
Comprenez les décisions qui le sous-tendent.
01
Use an NC emergency stop in series with the start PB and safety relay coil
02
Add a seal-in NO contact across the reset PB so the valve remains energized after release
03
Use a separate NO safety relay contact in series with the solenoid valve load
Reuse this pattern for any single-solenoid hydraulic directional valve controlled by a safety relay with monitored E-stop and manual reset.