10
eloProg - Vers. 1.0
Calculation of safety distance of an ESPE connected to eloProg
Any Electro-sensitive Protective Equipment device connected to eloProg, must be positioned at a
distance equal to or greater than the minimum safety distance
S
so that the dangerous point can
be reached only after stopping the dangerous movement of the machine.
The european standard:
- ISO 13855:2010- (EN 999:2008) Safety of machinery -
Positioning of safeguards with respect to
the approach speeds of parts of the human body.
1
provides the elements to calculate the proper safety distance.
Carefully read the installation manual of each device for specific information on the correct
positioning.
Remember that the total response time depends on:
eloProg response time + ESPE response time + response time of the machine (i.e. the time
taken by the machine to stop the dangerous movement from the moment in which the stop
signal is transmitted).
Electrical connections
The modules are provided with terminal blocks for the
electrical connections. Each unit can have 8, 16 or 24
terminals.
Each module also has a rear panel plug-in connector
(for communication with the master and with the other
expansion units).
The 485EPR02 and 485EPR04 are connected via
terminal blocks only.
Install safety units in an enclosure with a protection class of at least IP54.
The supply voltage to the units must be 24Vdc
±
20% (PELV, in compliance with the
standard EN 60204-1 (Chapter 6.4)).
Do not use the eloProg to supply external devices.
The same ground connection (0VDC) must be used for all system components.
1
"Describe the methods that designers can use to calculate the minimum safety distance from a specific dangerous point
for the safety devices, particularly Electro-sensitive devices (eg. light curtains), safety-mats or pressure sensitive floors and
bimanual control. It contains a rule to determine the placement of safety devices based on approach speed and the
stopping time of the machine, which can reasonably be extrapolated so that it also includes the interlocking guards without
guard locking."
