Operating instructions for safety module mod. NC96 MAT
WIDE Automation
S.r.l._Via Malpasso, 1340 I-47842 San Giovanni in Marignano [RN] Italia_Tel. +39 0541 827239 0541 825021_www.wideautomation.it
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Description
The NC96 MAT control unit has been designed for the control of pressure
sensitive mats and safety edges in accordance with EN ISO 13856-1: 2013,
EN ISO 13856-2: 2013, EN 60204-1: 2006 + A1: 2009, EN ISO 13849-1:
2015.
The operation of this module is based on the use of guided contact safety
relays.
Safety precautions
Pressure sensitive safety mats and edges perform a personal protective
function. Incorrect installations or manipulations can cause serious personal
injury.
Pressure sensitive safety mats and safety edges must not be bypassed
(shorting the contacts), moved, removed or otherwise rendered ineffective.
The machine manufacturer or installer is responsible for correct and safe
operation.
The auxiliary exchange output NC 31/32 is optically insulated and provides a
signal on the status of the device; therefore, it must not be used in any way
as a safety output.
The NC96 MAT module is not suitable for operation in the presence of
ionizing and non-ionizing radiation (X-rays, microwaves, lasers, ultraviolet
rays) (EN 60204-1: 2006, §4.4.7).
Operation
The
NC96 MAT
safety control unit is able to control the status of pressure-
sensitive safety mats and edges: the output is activated automatically only if
the two inputs are closed and if no operator is in the area covered by the
mat. (edge). When the safety device is pressed, the control unit opens the
safe outputs 13-14 and 23-24.
Reset is possible only once the device is no longer pressed, in accordance
with the requirements of EN ISO 13856-1: 2013 (Appendix A) and EN ISO
13856-2: 2013 (Appendix A).
The NC96 MAT can only be used with automatic start (reset); to configure
the system with monitored manual start (reset) it is necessary to use the
NC95
control unit.
The opening of even a single input connection determines a safety situation,
placing the safe outputs in the open state and preventing their re-closing
even after the contact has been re-closed.
The system composed of NC96 MAT + carpet or pressure sensitive edge
reaches the safety category
3
according to EN ISO 13849-1: 2015 only if
(see connection drawing):
- two relays are used to interrupt the load, each of which connected to an
output of the control unit.
- the relay contacts controlled by the control unit are inserted in the feedback
ring.
Safety is guaranteed by the use of guided contacts, redundancy and the
interconnection scheme of the contacts.
It is the responsibility of the user to choose suitable components for
safety applications, such as guided contact relays.
Installation
The installation must be carried out only by authorized personnel.
The NC96 MAT control unit must be installed in a suitable area of use
(electrical panel, junction box, at least IP54). The control unit is installed by
attaching it to a standard 35mm DIN omega rail.
Electric connections
Electrical connections must be made only by personnel authorized in
accordance with EN 60204-1: 2006.
All electrical inputs must be isolated from the main power supply or through a
transformer with separate windings in accordance with EN IEC 61558-2-6
with limited output voltage in the event of a defect, or by an equivalent
removable mechanism.
The power supply must be permanently connected using a cable with a
maximum length of 10m; safety mat must be connected to the unit with
cables with a maximum length of 30m.
The relay outputs have a maximum current of 3A; the power supply
connected to these outputs must be protected against overcurrent by
devices suitable for the loads to be protected.
All output contacts must have an adequate protection circuit for inductive and
capacitive loads.
If a standard power supply is used, all inductive and capacitive loads (e.g.
relay contacts) connected to the power supply must be connected to an
appropriate interference suppressor.
Maintenance and checks
The correct operation of the NC96 MAT control unit must be periodically
checked by the operator and/or by the control circuit of the machine in which
it is used periodically (at the beginning of each shift) by checking the
following:
- correct switching
- secure attachment of components
- correct fixing of the connections.
The device monitoring function is performed at each intervention of the
device itself.
In case of failure or wear, the damaged system must be replaced.
Warranty coverage disappears in the following circumstances:
- if the instructions are not followed
- non-compliance with safety regulations
- installation and electrical connection not carried out by authorized
personnel
- failure to carry out functional checks.
Setup
If the control unit does not seem to work when the supply voltage is applied
(the green POWER LED does not light up), the unit must be returned sealed
to the manufacturer. Check if the safety outputs switch (see LED table) by
activating the inputs.
