ABB JSHD4 Manuale di istruzioni originale - Pagina 5

Sfoglia online o scarica il pdf Manuale di istruzioni originale per Unità di controllo ABB JSHD4. ABB JSHD4 20. Three-position enabling device

Overview

JSHD4 is a dual channel three-position enabling device, intended for use in hazardous areas where no other

protection is possible or practical. The device as a stand-alone unit is not sufficient for this task and must be

connected to a suitable control unit (safety relay or safety-PLC) with two channel inputs and short-circuit detection.

Also, the machinery or equipment causing the potential danger may need to be set in jog-mode or by other means

limited in movement, speed, temperature etc.

Two three-position push buttons operated by one common surface ensures a high level of safety, both when

released and when pressed into the third and final position. The safety contacts are closed only in the middle

position, but are opened if pressed further and remain open during the return to the top (resting) position.

The anti-tampering device consists of a capacitive sensor and an accelerometer. By combining these sensors the

device can be used to determine if an operator is holding the enabling device. This can be used if there is any risk

for tampering of the enabling device.

JSHD4 is based on a modular system that allows for a number of different versions of a complete enabling device

to be created, using different top parts (handles) and bottom parts (with different cables and connectors, AS-i

nodes, emergency stop, etc). There are also a number of accessories available, such as fittings for safety

switches/sensors, anti-tampering electronics, cables and resting stations. For more information, see chapter Model

overview.

For more details on JSHD4 operation, see chapter Operation.

Warning! The anti-tampering device is not a safety function; the safety relies on the three-position button being

operated as intended.

Warning!

Carefully read through this entire manual before using the device.

The devices shall be installed by a trained electrician following the Safety regulations, standards and the Machine

directive.

Failure to comply with instructions, operation that is not in accordance with the use prescribed in these instructions,

improper installation or handling of the device can affect the safety of people and the plant.

For installation and prescribed use of the product, the special notes in the instructions must be carefully observed

and the technical standards relevant to the application must be considered.

In case of failure to comply with the instructions or standards, especially when tampering with and/or modifying the

product, any liability is excluded.

2TLC172052M0201, rev. A

www.jokabsafety.com

2011-10-06