ABB jshd4-5-ah Enabling Switch

Why Choose the ABB JSHD4-5-AH 2TLA019995R4000 Enabling Switch?

The ABB JSHD4-5-AH 2TLA019995R4000 is a compact and highly reliable three-position enabling switch designed for operator-controlled machine movement in hazardous areas where conventional guarding or protective devices may not be practical. Part of the ABB Jokab Safety JSHD4 series, it is intended for applications such as machine setup, programming, testing and maintenance where an operator needs controlled access to hazardous machine zones.

The JSHD4 uses a two-channel three-position enabling function. Machine movement is permitted only while the enabling actuator is deliberately held in its centre operating position; releasing the actuator or squeezing it fully to the third position causes the safety outputs to change state so that hazardous movement can be stopped by the connected safety control system.

This JSHD4-5-AH configuration includes integrated LEDs, a top auxiliary push-button and a cable-gland connection with a PCB providing 10 screw connections. Designed for use with a suitable safety relay or safety PLC, the device can support safety functions up to PL e, Category 4 in accordance with EN ISO 13849-1 when correctly incorporated into a complete safety system.

Key Advantages

• Three-position enabling operation supports safer manual intervention inside hazardous machine areas.
• Two-channel safety actuator designed for integration with safety relays and safety PLCs.
• Machine enabling occurs only in the deliberate centre operating position.
• Release or full compression of the actuator provides an additional means of stopping hazardous movement.
• Integrated LEDs and top push-button provide additional operator indication and control functionality.
• Cable gland with 10 screw connections enables flexible field wiring using the installer’s own cable.
• Supports safety functions up to PL e, Category 4 when correctly integrated into a compliant safety system.

Key Features

• ABB Jokab Safety JSHD4 series enabling device.
• Three-position enabling actuator.
• Two-channel safety operation.
• 24 V DC nominal operating voltage.
• Integrated LED indicators.
• Integrated top auxiliary push-button.
• Cable gland connection for field-installed cable.
• PCB with 10 screw connections.
• IP65 enclosure protection.
• Ergonomic handheld construction for machine setup and maintenance tasks.

Reliable Enabling Control for Machine Setup and Maintenance

Three-position enabling devices such as the ABB JSHD4 are designed for situations where an operator must enter or work close to a hazardous machine area while limited machine movement remains necessary. The centre position represents the deliberate enabling state, while releasing the switch or pressing it fully provides a rapid means of removing the enable signal.

The JSHD4 is intended to form part of a complete machine safety architecture rather than operate as a standalone protective device. When connected to an appropriate dual-channel safety relay or safety PLC with short-circuit monitoring, it can provide a high-integrity operator enabling function for controlled machine movement during setup, commissioning and service operations.

Typical Applications

• Machine setup and commissioning.
• Robot teaching and programming.
• Maintenance inside guarded machine areas.
• Fault finding and diagnostic operations.
• Manual jog and reduced-speed machine control.
• Industrial automation and production equipment.