Product Description
Suppressor Block
Frequently Asked Questions
Q: What is the CR 77732 suppressor block and what does it do?
A: The CR 77732 is an electrical suppressor block designed to eliminate electrical noise and transient voltage spikes in the control circuits of electric lift trucks. It protects solid-state controllers, solenoids, and relay coils from damage caused by inductive load switching. Commonly found in Crown, Toyota, Raymond, and Yale lift truck control systems.
Q: What voltage and electrical specifications does the CR 77732 suppressor block handle?
A: The CR 77732 is rated for 24 VDC control circuits standard in electric lift trucks. It suppresses inductive kickback transients typically 50 to 200 volts in magnitude. Verify the coil voltage, contact relay rating, and terminal configuration match your control circuit before installation. Do not use on AC circuits or higher voltage systems.
Q: How does the CR 77732 suppressor block protect lift truck control circuits?
A: When solenoid coils or relay coils de-energize, they generate high-voltage transients that can damage semiconductor logic boards and controllers. The CR 77732 contains a diode or RC network that clamps these voltage spikes and dissipates the energy as heat, preventing controller damage and extending circuit lifespan.
Q: What are warning signs that the CR 77732 suppressor block is failing?
A: Failure symptoms include intermittent control logic errors, controller reset or shutdown events during solenoid switching, display flickering, or unexpected fault codes. If control issues correlate with solenoid operation or if the suppressor block shows physical burn marks or discoloration, replacement is necessary.
Q: Which lift truck control systems use the CR 77732 suppressor block?
A: The CR 77732 is used in control circuits for Crown, Toyota, Raymond, Yale, Hyster, and similar electric pallet jack and lift truck models. It protects controllers in systems with 24 VDC solenoid-operated proportional or directional control valves. Verify your control schematic to confirm the correct suppressor block variant for your equipment.