The HVI-4 is a rugged, multi-channel high-voltage interlock module designed to monitor and safeguard bias supplies with precision and reliability. It features four independent comparator-driven channels that detect over-voltage or out-of-tolerance conditions, and can be configured in series or parallel to suit complex biasing architectures. A monitor output enables seamless integration with control systems for real-time status reporting and fault management. Ideal for critical instrument control and accelerator bias networks, the HVI-4 ensures that high-voltage environments remain under robust protection.