ABB jshd4-4-aj-a Enabling Switch

Why Choose the ABB JSHD4-4-AJ-A Enabling Switch?

The ABB JSHD4-4-AJ-A is an ergonomic three-position safety enabling switch designed for controlled machine operation when an authorised operator needs to work within or close to a hazardous machine area. Identified by ABB order code 2TLA019995R3300, it forms part of the ABB Jokab Safety JSHD4 series of handheld enabling devices for industrial machinery, robotics and automation systems.

The JSHD4-4-AJ-A combines a three-position enabling mechanism with integrated red and green LED indicators, a front auxiliary push button and anti-tamper electronics. Its three-position operating principle enables a safety control system to permit machine movement while the operator intentionally maintains the device in its enabled position. Releasing the actuator or pressing it fully provides the corresponding stop condition, making the device particularly suitable for commissioning, troubleshooting, programming, adjustment and test-running operations.

This configuration combines the JSHD4-4 top section with the AJ bottom section featuring a cable gland, PCB with 16 screw connections and anti-tamper PCB. The extensive terminal arrangement provides flexible hard-wired integration of the enabling contacts, LEDs, auxiliary controls and anti-tamper function. With safety performance up to PL e and Category 4, the JSHD4-4-AJ-A provides a versatile solution for demanding industrial machine-safety applications.

Key Advantages

• Ergonomic three-position enabling switch for industrial machine safety.
• Integrated anti-tamper electronics with hand detection help protect against manipulation of the enabling function.
• Designed for controlled machine movement during commissioning, troubleshooting and programming.
• Integrated red and green LED indicators provide clear visual status feedback.
• Integrated front auxiliary push button provides an additional machine-control function.
• 16 screw connections provide flexible hard-wired integration into safety and control circuits.
• Safety performance of up to PL e with Category 4 capability.
• Compact ergonomic handheld construction for machine setup and maintenance operations.

Key Features

• ABB Jokab Safety JSHD4 series.
• Three-position handheld enabling device.
• Integrated red and green LED indicators.
• Integrated front auxiliary push button.
• Integrated anti-tamper PCB.
• Hand detection functionality for enhanced protection against bypassing the enabling device.
• AJ bottom section with cable gland.
• PCB with 16 screw connections.
• Two enabling channels with change-over contact terminals.
• Suitable for integration with safety relays, safety PLCs and industrial machine controls.

Flexible Machine Safety with Anti-Tamper Protection

Three-position enabling devices such as the ABB JSHD4-4-AJ-A are designed for situations where machine commissioning, maintenance, troubleshooting or programming requires an operator to remain close to potentially hazardous movement. The enabling principle allows the associated safety system to permit movement only while the operator deliberately maintains the handheld control in its intended enabled position.

The JSHD4-4-AJ-A adds anti-tamper electronics with hand detection to help prevent the enabling function from being bypassed or permanently actuated. Its PCB provides 16 screw connections for flexible integration of the enabling channels, red and green LEDs, front auxiliary button and additional circuitry into the machine control system, making it particularly suitable for custom hard-wired safety architectures.

Typical Applications

• Industrial machinery troubleshooting and fault finding.
• Machine commissioning and test running.
• Robot cells and automated manufacturing equipment.
• Machine programming and setup operations.
• Packaging and processing machinery.
• Assembly and production equipment.
• Safety PLC and safety relay controlled systems.
• OEM machinery requiring anti-tamper three-position enabling control.