ABB JSHD4-1-AA 2TLA019995R0000 is a 24 V DC three-position enabling device with dual-channel safety contacts, five screw connections and a cable gland for controlled machine operation during troubleshooting, programming and test running.
£326.10
The ABB JSHD4-1-AA 2TLA019995R0000 is a robust three-position enabling device designed for safe machine intervention during troubleshooting, test running, programming and commissioning. Part of the ABB Jokab Safety JSHD4 range, it is intended to give an operator controlled access to hazardous machine areas while allowing machine functions to be enabled only when the device is deliberately held in its middle position.
The JSHD4 uses a three-position operating principle: the machine safety function is not enabled when the actuator is released, it is enabled when held in the central position, and it is deactivated again if the operator squeezes the device fully. This arrangement provides an important additional layer of protection during maintenance and manual machine operation because both releasing and over-travelling the enabling control produce a stop condition.
The JSHD4-1-AA version has no auxiliary buttons or LEDs and is supplied with a cable gland and five screw connections for customer wiring. The device is designed for use with 24 V DC safety circuits and its ergonomic yellow-and-black handheld construction makes it suitable for industrial environments where operators need a practical and dependable enabling control.
The ABB JSHD4-1-AA is designed around a three-position enabling principle that helps protect personnel who must enter or work close to hazardous machine areas during troubleshooting, setup or programming. In the released position, the enabling contacts do not permit hazardous machine functions. When the handle is deliberately pressed to its middle position, the safety system can permit controlled machine operation.
If the operator reacts instinctively to a hazardous situation by either releasing the device or gripping it tightly enough to press it into the third position, the enabling signal is removed. This three-position behaviour makes the JSHD4 especially useful for tasks where personnel must maintain direct control over whether machine movement is permitted while inside or near a safeguarded area.
| Manufacturer | ABB |
|---|---|
| Product family | ABB Jokab Safety |
| Series | JSHD4 |
| Model | JSHD4-1-AA |
| Manufacturer part number | 2TLA019995R0000 |
| Product type | Three-position enabling device |
| Application | Machine enabling / hold-to-run safety control |
| Operating voltage | 24 V DC ±10% at 20 °C |
| Three-position contact current | Maximum 20 mA |
| Maximum contact voltage | 30 V DC |
| Minimum contact load | 10 V DC, 8 mA |
| Operating positions | Released / enabled / fully depressed |
| Enabling contact arrangement | Dual channel |
| Electrical terminals | COM1, NO1, NC1, COM2, NO2 |
| Number of screw connections | 5 |
| Connection type | Cable gland with internal screw terminals |
| Conductor cross-section | 0.5–2.5 mm² |
| Wire stripping length | 5.0–5.5 mm |
| Terminal tightening torque | 0.5 N·m |
| Cable diameter | 3.5–8 mm |
| Operating force to enabled position | Approximately 15 N |
| Operating force to fully depressed OFF position | Approximately 45 N |
| Mechanical life, top to middle position | 1,000,000 cycles |
| Mechanical life, middle to bottom position | 100,000 cycles |
| Handle material | Polyamide / Noryl |
| Rubber material | NBR |
| Colour | Yellow and black |
| Weight | Approximately 0.2 kg without cable |
| Top configuration | JSHD4-1, no LEDs and no auxiliary buttons |
| Bottom configuration | AA, customer cable via cable gland |
| HS Code | 85365019 |
| Country of Manufacture | Sweden |
The ABB JSHD4-1-AA is a three-position enabling device used during troubleshooting, programming, test running, setup and other tasks where an operator needs controlled machine operation while working close to hazardous equipment.
The device has three operating states. Machine enabling is inactive when the control is released, active when it is deliberately held in the middle position, and inactive again when the handle is fully depressed.
ABB specifies an operating voltage of 24 V DC ±10% at an ambient temperature of 20 °C.
The JSHD4-1-AA provides five internal screw connections associated with COM1, NO1, NC1, COM2 and NO2, with the external cable entering through the AA cable gland.
No. The JSHD4-1 top section is the basic version without auxiliary push buttons or LEDs, making it suitable where only the three-position enabling function is required.
The AA cable gland is designed for cables with an outside diameter of approximately 3.5–8 mm.
The five-pole screw-terminal block accepts solid, flexible or stranded conductors with cross-sections of approximately 0.5–2.5 mm².
The specified operating force is approximately 15 N to reach the enabled middle position and approximately 45 N to reach the fully depressed OFF position.
ABB specifies approximately 1,000,000 cycles from the released to middle position and approximately 100,000 cycles from the middle to fully depressed position.
ABB Jokab Safety JSHD4 enabling devices are designed for controlled machine intervention tasks such as troubleshooting, programming and test running, combining an ergonomic handheld format with a three-position safety principle that removes the enabling signal if the operator either releases or fully squeezes the device.
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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...