ABB jshd4-2-ad-a Enabling Switch

Why Choose the ABB JSHD4-2-AD-A 2TLA019995R0500 Enabling Switch?

The ABB JSHD4-2-AD-A 2TLA019995R0500 is an ergonomic three-position enabling device designed for safe machine intervention during troubleshooting, programming, test running, commissioning and maintenance. Part of the ABB Jokab Safety JSHD4 range, it allows controlled machine operation only while the operator deliberately holds the enabling actuator in its middle position.

The JSHD4-2-AD-A combines the three-position enabling function with integrated LED indication, a front push button and a top push button. Its AD bottom section provides an 8-pole M12 connection, while the -A designation identifies the version fitted with an anti-tamper PCB for enhanced protection against improper manipulation of the enabling function.

Designed for safety applications up to Category 4 and Performance Level e (PL e) when correctly integrated, the JSHD4-2-AD-A provides a durable handheld solution for machinery where operators need controlled access to hazardous areas. The enclosure offers IP65 protection, while the three-position actuator requires approximately 15 N to reach the enabled position and approximately 45 N to reach the fully depressed OFF position.

Key Advantages

• Ergonomic three-position enabling switch for machine safety applications.
• Machine enabling is active only while the actuator is deliberately held in the middle position.
• Enabling signal is removed when the device is either released or fully depressed.
• Integrated LEDs provide clear safety-status indication.
• Includes both a front push button and top push button for auxiliary machine-control functions.
• 8-pole M12 connector provides convenient detachable machine wiring.
• Integrated anti-tamper PCB helps prevent improper manipulation of the enabling device.
• Supports safety applications up to Category 4 / PL e when correctly integrated.
• IP65 protection supports demanding industrial environments.
• Ergonomic handheld construction is well suited to commissioning and maintenance work.

Key Features

• ABB Jokab Safety JSHD4 three-position enabling device.
• Model JSHD4-2-AD-A.
• Manufacturer part number 2TLA019995R0500.
• Three-position actuator with released, enabled and fully depressed states.
• Dual-channel enabling function.
• Maximum three-position contact rating of 30 V DC, 20 mA per channel.
• Minimum three-position contact load of 10 V DC, 8 mA.
• Integrated green and red LED indication.
• Front-mounted auxiliary push button.
• Top-mounted auxiliary push button.
• Maximum auxiliary push-button rating of 500 mA.
• 8-pole M12 electrical connection.
• Integrated anti-tamper PCB.
• Approximate operating force of 15 N to the enabled position.
• Approximate operating force of 45 N to the fully depressed OFF position.
• Approximate auxiliary push-button force of 2.5 N.
• IP65 degree of protection.

Three-Position Enabling with Auxiliary Controls and Anti-Tamper Protection

The ABB JSHD4-2-AD-A uses a three-position operating principle that enables controlled machine movement only while the operator intentionally holds the actuator in its middle position. If the operator releases the device or reacts to a hazardous situation by squeezing it completely, the enabling contacts return to their safe state and the associated safety system can stop hazardous machine functions.

In addition to the core enabling function, this version incorporates green and red status LEDs plus front and top auxiliary push buttons, allowing functions such as machine start, jog, reset or other control commands to be incorporated into the handheld device according to the machine design. The integrated anti-tamper PCB provides additional protection against attempts to defeat the three-position safety function, while the 8-pole M12 connector simplifies connection and replacement.

Typical Applications

• Machine troubleshooting and fault finding.
• Industrial robot programming and teach operations.
• Manual test running of automated machinery.
• Machine setup and commissioning.
• Maintenance inside safeguarded machine areas.
• Controlled reduced-speed machine operation.
• Production equipment adjustment and calibration.
• Automated manufacturing and assembly cells.
• Applications requiring auxiliary buttons on the enabling device.
• Machine-safety systems requiring anti-tamper protection.