Solid state Relay with Load Circuit Monitoring

· Photoelectric isolation between input and output, insulation voltage greater than 2500V.

· Control signal compatible with TTL and PLC logic interfaces.

· Dual-color LED indicates normal operation and faulty load status.

· Solid-state contactless switching output, fast switching speed, no sparking or arcing.

· Built-in overtemperature automatic protection, with alerts for abnormalities in the solid-state switch or load.

· Solid encapsulation, waterproof, corrosion-resistant, and shockproof, ensuring reliable and durable switching with easy installation.

· In addition to the functions of the solid-state relay, this product can automatically detect whether the solid-state switch is functional or if the external load is open-circuit, issuing a warning signal in case of abnormalities.

Before applying the control signal, if the red light is on and the auxiliary contacts (points A and B) change from normally open to normally closed, check whether the circuit heater is open or the solid-state relay is damaged. When the green light is on, the circuit is fully operational, and the control signal can be applied to start the device. If flickering of the red and green lights is observed during operation (while applying pulse-width modulated signals), it indicates an abnormality, and the device must be stopped for inspection.

· When selecting a product, appropriate current derating should be applied based on the nature of the load. (For resistive loads: 2-3 times the load current. For inductive or capacitive loads: 3-4 times the load current.)

· To prevent damage to the solid-state switch due to load short circuits, connect a fast-acting circuit breaker, fast-blow fuse, or select the GTJ19L series overcurrent-protected solid-state switch in series with the load circuit, matching the load current rating.

· For inductive loads, connect a varistor across the output terminals to protect against transient high voltages that could damage internal components.

· If intermittent load connection is observed during use, it may be caused by overheating protection due to poor heat dissipation of the solid-state switch. Check for loose mounting screws, fan failure, or insufficient heat sink size.

· During installation, ensure that the contact surface between the heat sink and the product is flat and smooth. Apply a layer of thermal grease, and securely fasten the screws with flat washers and spring washers using a symmetrical tightening method.