The Olympus 4HD is a heavy duty solenoid controlled access lock available with either a stainless steel tongue actuator or a heavy duty bolt assembly. The Olympus 4HD is capable of supporting Category 4 safety systems through its 2n/c 1n/o contacts and is ideal for all types of hinging or sliding access points with a good tolerance for misaligned guarding. The unit is locked by the solenoid when it is de-energized and opened when energized. A mechanical key override facility for the solenoid comes standard. The Olympus 4HD is ideal for use on production cells and automated production and assembly lines where fast access is required.