ABB JSHD4-4-AJ 2TLA019995R3200 is a three-position safety enabling switch with integrated LEDs, a front auxiliary push button, cable gland and PCB with 16 screw connections for industrial machine safety applications.
The ABB JSHD4-4-AJ is an ergonomic three-position safety enabling switch designed to provide controlled machine operation when an authorised operator needs to work within or close to a hazardous machine area. Identified by ABB order code 2TLA019995R3200, it forms part of the ABB Jokab Safety JSHD4 series of handheld safety control devices for industrial machinery, robotics and automation systems.
The JSHD4-4-AJ combines a three-position enabling mechanism with integrated LED indicators and a front auxiliary push button. The enabling function allows machine movement to be permitted while the operator deliberately maintains the device in its intended operating position, while releasing or fully depressing the actuator changes the safety contact state. This operating principle makes the device particularly suitable for commissioning, troubleshooting, programming, adjustment and test-running applications.
This configuration combines the JSHD4-4 top section with the AJ bottom section featuring a cable gland and PCB with 16 screw connections. The generous terminal arrangement provides flexible hard-wired integration of the enabling contacts, LEDs and auxiliary controls into machine safety systems. With safety performance up to PL e and Category 4, the JSHD4-4-AJ is designed for demanding industrial safety applications.
Three-position enabling devices such as the ABB JSHD4-4-AJ are designed for situations where machine commissioning, maintenance, troubleshooting or programming requires an operator to remain close to potentially hazardous machine movement. The three-position principle allows the associated safety system to permit movement only while the operator deliberately maintains the enabling control in its intended operating position.
The JSHD4-4-AJ provides extensive connection flexibility through its PCB with 16 screw terminals. Separate connections are available for the two enabling contact channels, LED indication and auxiliary controls, allowing machine builders to integrate the device into a wide range of hard-wired safety architectures. The front push button can provide an additional machine-control command while the red and green LEDs give useful visual status indication.
| Manufacturer | ABB |
|---|---|
| Series | ABB Jokab Safety JSHD4 |
| Model | JSHD4-4-AJ |
| Manufacturer part number | 2TLA019995R3200 |
| Product type | Safety control enabling device |
| Number of operating positions | 3 |
| Status indication | Integrated red and green LEDs |
| Additional control | Front auxiliary push button |
| Electrical connection | Cable gland with PCB and 16 screw connections |
| Enabling contacts | Two channels with change-over contact terminals |
| Performance level | Up to PL e |
| Safety category | Category 4 according to ISO 13849-1 |
| Dimensions (H × W × D) | approx. 167 × 34 × 50 mm |
| Net weight | approx. 0.314 kg |
| EAN | 7350024453669 |
The ABB JSHD4-4-AJ is a three-position safety enabling switch used to provide controlled machine operation during activities such as commissioning, troubleshooting, programming, adjustment and test running.
The manufacturer part number for the ABB JSHD4-4-AJ enabling switch is 2TLA019995R3200.
The JSHD4-4-AJ combines its three-position enabling function with integrated red and green LED indicators and a front auxiliary push button, providing both operator feedback and additional control functionality.
The ABB JSHD4-4-AJ uses an AJ bottom section with a cable gland and PCB providing 16 screw connections, allowing flexible hard-wired integration of its enabling, indication and auxiliary functions into a machine safety system.
The ABB JSHD4-4-AJ supports safety functions up to PL e and Category 4 according to ISO 13849-1 when correctly integrated into an appropriate safety-control architecture.
ABB Jokab Safety JSHD4 enabling devices provide ergonomic operator control for industrial machinery, with the JSHD4-4-AJ combining three-position enabling, LED indication, an auxiliary front button and flexible 16-terminal hard-wired connectivity for demanding machine setup, troubleshooting and programming applications.
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LED Controls is a specialist distributor of factory automation and industrial controls, supplying OEMs, machine builders, panel builders and end users throughout the UK and worldwide. As a trusted UK distributor for many of the world’s leading automation manufacturers, we provide industrial control products, technical expertise and bespoke automation solutions backed by outstanding customer service.
2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...
2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...