PRIMARY SAFETY CIRUIT CONVEYANCE OVER-SPEED DEVICE   With the use of SIL2 rated frequency counters, inductive sensors and either a single or dual solenoid system within the hydraulic pack, COS-1 will automatically de-energise power to the solenoids and and therefore release hydraulic pressure from the on-board braking system, should an over-speed condition of the conveyance … Continue reading COS 1 – CONVEYANCE OVERSPEED SYSTEM