ABB JSHD4-4-AJ-A 2TLA019995R3300 is a three-position safety enabling switch with red and green LEDs, a front auxiliary push button, cable gland, 16 screw connections and anti-tamper hand detection for industrial machine safety applications.
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.
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.
| Manufacturer | ABB |
|---|---|
| Series | ABB Jokab Safety JSHD4 |
| Model | JSHD4-4-AJ-A |
| Manufacturer part number | 2TLA019995R3300 |
| Product type | Safety control enabling device |
| Number of operating positions | 3 |
| Status indication | Integrated red and green LEDs |
| Additional control | Front auxiliary push button |
| Anti-tamper function | Integrated anti-tamper PCB with hand detection |
| 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. 0.178 kg |
| EAN | 7350024453676 |
The ABB JSHD4-4-AJ-A is a three-position safety enabling switch designed for controlled machine operation during activities such as commissioning, troubleshooting, programming, adjustment and test running.
The manufacturer part number for the ABB JSHD4-4-AJ-A enabling switch is 2TLA019995R3300.
The JSHD4-4-AJ-A incorporates an anti-tamper PCB with hand detection, while retaining the three-position enabling function, red and green LEDs, front auxiliary push button, cable gland and 16 screw connections of the JSHD4-4-AJ configuration.
The ABB JSHD4-4-AJ-A uses an AJ bottom section with a cable gland and PCB providing 16 screw connections, allowing flexible hard-wired integration of its enabling, indication, auxiliary control and anti-tamper functions.
The ABB JSHD4-4-AJ-A supports safety functions up to PL e and Category 4 according to ISO 13849-1 when correctly incorporated into an appropriate safety-control architecture.
ABB Jokab Safety JSHD4 enabling devices provide ergonomic operator control for industrial machinery, with the JSHD4-4-AJ-A combining three-position enabling, LED indication, an auxiliary front button, flexible 16-terminal connectivity and anti-tamper hand detection 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...