10
MANUGENH3 0N3
User manual
VER 1.05
1.3.9
Enabling Device
The Enabling Device is a three positions enable switch providing two redundant switching N.O.
(Normally Open) contacts.
User should directly connect the Enabling Device outputs to the machine cabinet and monitoring
devices. For further information about the handheld terminal cable pin-out please refer to paragraph
2.5.2.
Two positions, “Null” and “Panic”, represent off condition while only the “Enable” position allows
activation.
For the related safety function once it is interfaced with the machine control logic (please refer to
paragraph 2.5.4.2).
Warning!
•
User is responsible for interfacing the Enabling Device to the machine control logic and
implementing the enabling function according to the safety level determined in a previous
risk analysis.
•
The enable switch fulfils its protective function only if the operator can recognize the danger
in time.
•
In case of dangerous states the logic controller must provide that, additionally to the enable
switch, another conscious start command should be required to allow activation.
•
The only person permitted in the dangerous area is the person activating the enable switch.
•
For further and more detailed information about the enable switch, as the electrical and
mechanical life, please refer to paragraph 2.4.1.9 and 2.5.4.2.
Functionality
The Enabling Device can have three different positions:
Switch position
Function
Enable switch
Switching contact
1
Zero position
Not pressed
Off (opened)
2
Enable
Pressed
On (engaged)
3
Panic
Pushed all the way in
Off (opened)
The positions null and panic must be cabled and controlled by the machine logic in order to guarantee
a stop category 0 or 1.
Zero position
When not pressed the Enabling Device returns to the zero position
Figure 1: Zero position
