ABB JSHD4 Manuale di istruzioni originale - Pagina 14

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

Operation

The three possible positions of the main button represent three different states according to the figure below.

State 1 – "Resting state":

Button rested, i.e. not pressed.

Process not allowed to run.

Waiting for the button to be pressed into its middle

position ("operating state").

State 2 – "Operating state":

Button actuated, pressed into its middle position.

Process is allowed to run.

Process is stopped if the button is released or

pressed to its end position ("stopping state").

State 3 – "Stopping state":

Button is pressed to its third and final position.

Process is stopped by the control unit.

Button must be released into "resting state" before

"operating state" can be reached again.

The front and top button functionality are user defined and can be used for start/stop of individual movements etc.

They have no intrinsic safety and are only to be used for subordinate functions.

The anti-tampering device has two requirements to determine if JSHD4 is operated correctly:

1 ) A capacitive sensor determines if the device is held by a hand.

2 ) An accelerometer determines if the device is moving.

The internal contact is opened if the device is not held by a hand or if it has not moved for more than 20 seconds.

NB: Not all models are equipped with the additional (front and/or top) button or the anti-tampering device, see

Model overview for further details.

Warning! The signals from the front and/or top button, as well as the anti-tampering device, are non-failsafe and

must never be used for safety functions. They may enhance the safety level but can not be used alone, only in

combination with other safety functions.

2TLC172052M0201, rev. A

2011-10-06