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28.04.2014
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5.3 Intervention mode and operation of enabling handle
The intervention mode and operation of the product depend on the needs of the application.
Intervention mode
- The wireless enabling handle can be used on machines in the following modes :
o
« Monitoring - Diagnostic»
o
« Manual control ».
The detailed intervention conditions are given in the next section.
The wireless enabling handle can be configured to manage access to a machine area. For this purpose, the
« 4 control buttons » mode is used.
The principle of the machine area access function is detailed below :
- Application programs 8 and 9 of the receiver are dedicated to this purpose (chosen using the 2 “B”
selectors)
- The access gate or safety light barrier is controlled by the receiver using 2 inputs.
- The user makes a request for authorisation to access the machine area using one of the two buttons (B1
or B2) on the wireless enabling handle.
- This request initiates a time delay (1) inhibiting the two gate contacts or the safety output of a safety light
barrier.
- While the gate is opened or while crossing the safety light barrier, the receiver safety relays remain
active.
- Once the gate has been closed or the safety light barrier has been crossed, the inhibit condition is
stopped to prevent entry of any other person.
(1) configurable by 2 « A » selectors on receiver.
Handle operating mode
- The wireless enabling handle can be used in the following 2 operating modes :
o
« 4 control buttons »
o
« function selection ».
This will depend on the number of commands to be generated. For an application requiring more than 4
commands to be generated, the handle will need to be configured in « function selection » mode using the
« Dialog RSP » PC software supplied with the handle.
5.3.1 Conditions for intervention in «monitoring - diagnostic» mode
Safety condition in this intervention mode :
This intervention mode must satisfy the requirements of standard NF EN12100-2 §5.5 «Additional preventive
measures».
In this intervention mode, the product provides a wireless individual protection system for qualified personnel
intervening for equipment monitoring or diagnostic purposes, whether in downgraded operation or not.
The regulations prohibit direct intervention on the equipment.
The « monitoring - diagnostic» intervention mode is only possible provided the enabling handle is configured for
« 4 control buttons » operation (ex-factory configuration)
The « monitoring - diagnostic» intervention mode is only acceptable provided:
o
The risk assessment shows that injury to the intervening technician can be avoided in the event
of an immediate danger.
o
The risk assessment shows that the time required to stop the equipment by releasing or
clenching the trigger is sufficiently short to prevent placing the intervening technician in danger.
o
An emergency shutdown of the equipment by clenching or release of the enabling handle trigger
does not produce any additional dangerous condition.
o
The operator can keep the enabling handle in his hand without releasing the trigger throughout
the time of the intervention.
In the « monitoring - diagnostic » mode,
the receiver can manage (or not) access to the machine area.
