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Overview
General description
JSHD4 is a two channel actuator with 3-position push buttons designed for use in hazardous areas where
alternative protective devices are not possible or practical. As an independent unit, the device is inadequate for this
task and must therefore be connected to a suitable control device (safety relay or safety PLC) with inputs for dual-
channels and short circuit protection. Additionally, the machinery or the equipment causing the potential danger
needs to be put in jog position or otherwise restricted in movement, speed, temperature, etc.
Two 3-position push buttons that are simultaneously enabled by a common surface allow for a high level of safety,
both when the push buttons are released or pressed in to their third and final position. The safety connectors are
only closed in the button's midpoint position, but open when pressed in further and are held open when the button
is released to its top position (sleep position).
The anti-cheat protection consists of a capacitance sensor and an accelerometer, and the combination of these is
used to determine if there is an operator holding the 3-position device. This is useful if there is a risk that the device
could be used improperly.
JSHD4 is based on a modular system which makes it possible to assemble a complete three-position device with
different top parts (handle) and bottom parts (which may have different cables or connectors, AS-i nodes,
emergency stops, etc. integrated). There are also a number of accessories available, such as mounting plates for
interlock switches, anti-cheat-boards, cables and brackets. For more information, see the Overview of models
chapter.
For more information about JSHD4 in operation, see the Operation chapter.
Warning! The anti-cheat protection is not a safety function as safety is based on the operator using the 3-position
button.
Safety instructions
Warning!
Carefully read through the entire user manual before using the unit.
The units must be installed by a trained electrician who observes the safety regulations, the specified standards
and the Machinery Directive.
Failure to comply with these instructions, any operation that is not in accordance with what is stated in these
instructions, and the improper installation or handling of the unit can all impact on the safety of people and
equipment.
For installation and the prescribed use of the product, the special notes indicated must be carefully observed and
the technical standards relevant to the application must be complied with.
Failure to comply with the instructions or standards, especially when tampering with and/or modifying the product,
voids all liability.
2TLC172072M0201, rev. F
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www.abb.com/jokabsafety
2018-06-01
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