ABB jshd4-2-aj Enabling Switch

Why Choose the ABB JSHD4-2-AJ Enabling Switch?

The ABB JSHD4-2-AJ is an ergonomic three-position safety enabling switch designed to provide controlled machine operation when an authorised operator needs to work within a hazardous area. Identified by ABB order code 2TLA019995R1000, it forms part of the ABB Jokab Safety JSHD4 series of handheld enabling devices for industrial machinery and automation systems.

The JSHD4-2-AJ uses a three-position enabling mechanism so that machine movement can be permitted only while the operator intentionally holds the device in its enabled position. Releasing the switch or pressing it fully provides the safety switching response required by the control system, making the device particularly suitable for troubleshooting, test running, programming and other tasks where limited machine movement may be required.

This version combines the JSHD4-2 upper section with LEDs, a front push button and a top push button with the AJ bottom section featuring a cable gland and PCB with 16 screw connections. Its robust IP65-rated construction, ergonomic handheld format and safety performance of up to PL e make it well suited to demanding industrial machine-safety applications.

Key Advantages

• Ergonomic three-position enabling switch for machine safety applications.
• Designed to permit controlled machine movement during troubleshooting, testing and programming.
• Safety performance of up to PL e according to EN ISO 13849-1.
• Category 4 safety capability according to ISO 13849-1.
• Integrated LED status indication for clear operator feedback.
• Additional front and top push buttons for auxiliary machine-control functions.
• 16 screw connections provide flexible hard-wired integration into safety and control circuits.
• IP65 protection supports use in demanding industrial environments.

Key Features

• ABB Jokab Safety JSHD4 series.
• Three-position handheld enabling device.
• Two change-over contacts for enabling-switch operation.
• Integrated LED indicators.
• Integrated front push button and top push button.
• Cable gland connection for field wiring.
• PCB with 16 screw connections.
• Quick-break switching mechanism.
• Cross-wire monitoring capability for compatible safety systems.
• Suitable for integration with industrial safety relays, safety PLCs and machine-control systems.

Controlled Machine Operation in Hazardous Areas

Three-position enabling devices are used where an operator must perform tasks near potentially hazardous machine movement while retaining direct control over whether movement is permitted. The ABB JSHD4-2-AJ is designed so that the safety system can enable controlled movement only while the enabling switch is deliberately maintained in its intended operating position.

The device is particularly useful during machine commissioning, fault finding, adjustment, programming and test running. Its additional front and top buttons can be incorporated into machine-control functions, while the integrated LEDs provide convenient visual status indication. The 16-terminal screw connection arrangement provides flexibility when integrating these functions into an industrial safety-control system.

Typical Applications

• Industrial machinery troubleshooting and fault finding.
• Machine commissioning and test running.
• Robot cells and automated manufacturing equipment.
• Machine programming and setup operations.
• Production and assembly machinery.
• Packaging and material handling equipment.
• Safety PLC and safety relay controlled systems.
• OEM machinery requiring handheld three-position enabling control.