NORSTAT Non-Contact Safety Switches User Manual

MECHAN

Installation Guide : SCU-1 & HE Safety Switches

Keep this guide for future reference

This information is designed to help suitably qualied

personnel install and operate Mechan Safety equipment.
Before using this product, read this guide thoroughly along
with any relevant European and/or National standards e.g.
Machinery Directive 2006/42/EC and it’s amendments,
Provision and Use of Work Equipment Regulations.

Further information can be obtained from Mechan Controls

Description

Mechan HE safety switches are magnetically coded, solid
state non-contact safety switches for use in machine guard­ing applications.

Non-contact operation makes the HE switches easy to
install and tolerant to misalignment. The solid state design
is even more tolerant to shock and vibration, and provides
single point switching which makes for a simpler and more
reliable machine guard interlock.

The additional security of the coded magnetic operation
along with fully sealed IP67 rating make these switches
ideal for use in wet or dusty and harsh environments.

The HE safety switches have been designed to connect to
the SCU-1 Safety Control Unit. When installed correctly, up
to 30 switches can be installed in series.

Operation

The HE safety switch has 2 x N/O + 1 N/C bi-directional
solid state outputs along with built in LED(s) for indication.
When installed on a machine guard, power is applied, and

the switch and actuator are within the specied operating

range, the N/O Outputs will be closed, the N/C Output will
be open. When the actuator moves out of the operating
range, the N/O Outputs will open, the N/C Output will close.
(See page 3 for LED Indication.)

The HE safety switch and actuator have an 7mm switching
distance and can approach each other from most angles.
When the switch is closed the targets on the printed face of
the switch must be aligned.

To avoid physical damage, do not use the switch and ac­tuator as a stop, leave a 1-2 mm gap for best operation and
tolerance to machine guard vibration.

Applications

Interlocked guards where additional security required.
Door locking is not required.
Harsh environments where vibration, water or dust are
problems.

Food and Beverage packing/lling systems

Dairy Pharmaceutical Paper Industry
Can Forming and Filling, (Aluminium, Steel, Plastic)
Semi conductor Manufacture/Assembly.

CAT 4

SIL 3 PLe

APPROVALS

CE Complies with all relevant sections of the

CE marking directive

TUV CAT 4 SIL 3 PLe

EUROPEAN DIRECTIVES

Machinery Directive 2006/42/EC

Low Voltage Directive 2006/95/EC

Electromagnetic Compatibility Directive 2004/108/EC

EUROPEAN STANDARDS

EN ISO
13849-1

EN ISO
62061

EN 60204 Safety of Machinery

EN
60947-5-1

EN 1088 Interlocking devices associated with

EN
60947-5-3

Declaration of Conformity

See back page for declaration of conformity.

Safety of Machinery
Safety related parts of control systems

Safety of Machinery - Functional safety
of safety related electrical, electronic and
programmable electronic control systems

Electrical equipment for machines

Low voltage switch gear and control gear

guards

Safety of Machinery

Specication for low voltage switchgear

and control gear

NORSTAT INC. 300 Roundhill Dr. Rockaway, NJ 07866 Tel: [phone] Fax: [phone] www.norstat.com

SAFETY CONTROL UNIT

1

Mounting on 35mm DIN Rail

The control modules are de­signed to be mounted in an IP55
(minimum) control cabinet.

The modules clip on to standard
35 mm symmetric DIN-Rail

2

Removal from 35mm DIN Rail

To remove the modules, gently
lever out the DIN clip with a
small screwdriver as shown (1).

Tilt the unit in the direction (2)
and slip the unit off the DIN Rail

1

2

CONTROL UNIT RESET

To remove lid, use small screwdriver in the lid recess as
shown and prise gently upwards.

Indication

POWER

When power is

connected, the red

LED will be

illuminated

OUTPUT

When K1 & K2 are

illuminated green,

the outputs 13/14

& 23/24 will be

closed and 31/32

will open.

Manual Reset

Internal switch is set to the
LOWER position

Circuit X1/X2 requires a
momentary N/O button to
initialise reset.

SAFETY SWITCHES

Mounting the Safety Switches

Do not use
safety switches
as a stop.
1 mm separation
when closed
provides the best
results.

Minimum separation 50mm
between adjacent switches.

Automatic Reset

DO NOT mount
on hinged side of
the guard.

Internal switch is set to the
UPPER position

Circuit X1/X2 requires a link.
NOTE: Closed contacts on
K3 & K4 can still be moni­tored

EN1088 :
Hide the actuator where
possible.

ASSS

A

A

NORSTAT INC. 300 Roundhill Dr. Rockaway, NJ 07866 Tel: [phone] Fax: [phone] www.norstat.com

Minimum Gap

50

mm

A
S

AS

SAFETY SWITCHES

Indication

HE1 HE2

HED

GS1 Power Run GS2

Power Off Off Off Off Off Off Off

Power On Gate(s) Open Red Red Off Red Off Off

Power On Gate Closed Green Green Yellow Red Off Off

Power On Gate 1 and 2 Closed Yellow Red Green Yellow

HE1 HE1-SS, HE2 & HE2-SS HED

Operation

The HE Safety
switches are ex­tremely versatile
and can approach
each other from any
angle without false
tripping.
When the guard is
closed the targets
on the printed face
of the switch and
actuator must be
aligned.

Switching Characteristics

The chart shows the
switching points in
millimetres.

NORSTAT INC. 300 Roundhill Dr. Rockaway, NJ 07866 Tel: [phone] Fax: [phone] www.norstat.com