Mechan Controls SCU-1, HE Installation Manual

Keep this guide for future reference

Description

Operation

Applications

Declaration of Conformity

This information is designed to help suitably qualifi 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

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.

The HE safety switch have up to 2 x N/O + 1 N/C bi­directional 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 speci­fi 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.

Interlocked guards where additional security required.
Door locking is not required.
Harsh environments where vibration, water or dust are
problems.
Food and Beverage packing/fi lling systems
Dairy Pharmaceutical Paper Industry
Can Forming and Filling, (Aluminium, Steel, Plastic)
Semi conductor Manufacture/Assembly.

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

Safety of Machinery
Safety related parts of control systems

EN ISO
62061

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

EN 60204 Safety of Machinery

Electrical equipment for machines

EN
60947-5-1

Low voltage switch gear and control gear

EN 14119 Interlocking devices associated with

guards

EN
60947-5-3

Safety of Machinery
Specifi cation for low voltage switchgear
and control gear

See back page for declaration of conformity.

MECHAN CONTROLS

Installation Guide : SCU-1 & HE Safety Switches

Listed
IND.CONT.EQ
2HA0

®

CAT 4 SIL 3 PLe

SAFETY CONTROL UNIT

MOUNTING SAFETY SWITCHES

Mounting on 35mm DIN Rail

HED Safety Switches - 2 Gate operation

HE1/2/3/4 & 6 Safety Switches

Removal from 35mm DIN Rail

Indication

CONTROL UNIT RESET

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.

Internal switch is set to the LOWER posi­tion

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

Internal switch is set to the UPPER posi­tion

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

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

Manual Reset Automatic Reset

1

2

1

2

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

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

HED Switches are designed to monitor 2 doors with one switch and 2 actuators. Simplifying installation by reducing wir­ing to the control panel, and the number of brackets required for the switches.

Both gates must be closed to enable the NO contacts of the switch to close and
the NC indication contact to open. Opening either gate will open the NO con­tacts and close the NC contact. LED indication is available on the switch to help
fault diagnosis.

DO NOT mount
on hinged side of
the guard.

EN1088 :
Hide the actuator where
possible.

AS

AS

A
S

50

mm

Minimum Gap

A A

SS

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

Mount the switch on to the machine frame and the actuator on to
the opening edge of the door.

Always try to mount the switch
on non-ferrous material. (Ferrous
materials may reduce the
switching distance.)

Minimum separation 50mm be­tween adjacent switches.

SAFETY SWITCHES

Operation

Switching Characteristics

Indication

The HE safety switches have up to 2xN/O + 1xN/C solid state outputs along with built in LED(s) for indication. With
power applied to the switch and actuator aligned correctly within the specifi 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. The actuator(s) can approach the switch 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.

NOTE: The HED switch requires both actuators to be in place to operate the contacts. Removing one actuator will open
the NO contacts and close the NC contact.

The HE3 is designed
to operate Face to
Face. Enabling easy
installation in small
spaces,

The Targets must be
aligned ie.the arrows
together at the top of
the switch.

The HED double switch is
designed to monitor two
adjacent doors.

Both actuators need to be
in place to close the NO
output contacts and open
the NC auxiliary contact.

HE1, HE2, HE3, HE4, HE6

HED
GS1 Power Run GS2

Power Off Off Off Off Off Off

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

Power On Gate 1 Closed Green Yellow Red Off Off

Power On Gate 1 and 2 Closed Yellow Red Green Yellow

NOTE: HEM-40 Does not have on switch LED Indication

The chart shows the
switching points in mil­limetres.

HE1 HE2

HE3

HE6 HE4

HED

HEM40

CONNECTIONS & FUSES
Pre-wired Switches

NOTE 1 : THE SCU-1 SAFETY CONTROL UNIT IS DESIGNED TO WORK WITH 2 X NO INPUT FROM THE HE
SAFETY SWITCHES

CONNECTION FOR A SINGLE SWITCH

M12 Leaded Quick Disconnect (LQD)

HE1 / HE2 / HE6 & HED

HE1 / HE2

Contacts 1NO + 1 NC

(See Note 1)

HE1 / HE2 / HE3 / HE6 / HED / HEM40

Contacts 2NO + 1 NC

HE1 / HE2

Contacts 2NO

(Note: Yellow & Green not connected)

M12 Leaded Quick Disconnect

CONTACT OPERATION -The N/O contact(s) on Mechan safety switches are open when the actuator is away from

the switch. When the actuator is within the specifi ed operating distance the N/O contact(s) will close and the N/C
contact will open
FUSES - All contacts should have external fuses fi tted. Fuse Rating = 400mA Quick Blow

CONNECTION FOR UP TO 30 SWITCHES

NOTE 1 : THE SCU-1 SAFETY CONTROL UNIT IS DESIGNED TO WORK WITH 2 X NO INPUT FROM THE HE SAFETY SWITCHES

DIMENSIONS

SCU-1

HED

NOTE
HED switch has three options for
cable exit to enusure easy installation:
HED-21-DC-xxC
Cabel exit in centre of switch (1)
HED-21-DC-xxL
Cabel exit from left had sideof the switch (2)
HED-21-DC-xxR
Cabel exit from right hand side of the switch (3)

xx= cable length or lqd

HE1 & HE3

HE1-SS & HE3-SS

(1)

(3)

(2)

HE2 & HE2-SS

HE6

HE4 HE4-SS

HE6-SS

HEM40

Fixing with Stainless Steel
M4 Countersunk Screw

Dia 40

23

13

Dia 40.0

SAFETY CONTROL UNIT

Supply nominal voltage 24Vac/dc (+/- 15 %)

Nominal power consumption 3VA
Safety contacts 2 x NO
Auxiliary contact 1 x NC
Output contact rating (max) 4A/230Vac; 2A/24Vdc(Res.)@Cos=1
Output contact rating (min) 10V/10mA
Output contact fuse rating AC=5A; DC=2.5A; Quick blow
Drop out time Deactivation by inputs, 13ms
Internal fuse 100mA Resetable
Internal fuse recovery time >2 Seconds
Internal switches Reset Manual / Automatic—Selectable
Max conductor size 1 x 2.5mm stranded with sleeves, 1 x 4mm solid
Installation group (Control unit) C in accordance with VDE0110
IP Rating Housing IP40, Terminals IP20
Operating temperature -10C to +55C (85% Humidity max)
Storage temperature -20C to +60C
Housing material Polycarbonate Red
Mounting / Fixing 35mm Symmetric DIN Rail
Utilisation category in accordance with EN 60947-4-1
Safety contacts:AC1 at 230 V Imin:10mA.Imax:4A
Safety contacts:DC1 at 24 V Imin:10mA.Imax:2A
Air gap creepage in accordance with EN 60947-1 Vibration In Accordance With EN 60068-2-6
Pollution Degree 2 Weight 210g
Over voltage Category III Frequency 10-55Hz
Rated Insulation Voltage 250V Amplitude 0.35mm
Rated Impulse Withstand Voltage 4.0KV

Simultaneity Channel 1 ∞
Simultaneity Channel 2 ∞

SAFETY SWITCHES

Operation Coded Non-contact
Contact Arrangements 2 x N/O + 1 x N/C
Safety Contact Operating Distance 7mm ON / 12mm OFF
Safety Contact Rating DC: 24Vdc / 400mA
Auxiliary Contact Rating DC: 24Vdc / 400mA
External Fusing ( When not using SCU-1 ) 400mA
Dimensions See page 6
IP Rating IP67
Cable Length 100 Metres max
Operating temperature -25°C to +55°C
Storage temperature -25°C to +55°C
Mounting Target to target
Construction Red ABS Resin Filled or 316 Grade Stainless Steel resin Filled

SAFETY RELATED DATA

PL In accordance with EN ISO 13849-1 PL-e, CAT 4
SIL CL in accordance with EN IEC 62061 SIL 3
PFHd in accordance with EN IEC 62061 3.62 x 10

-09

PFH 4.43 x 10

-09

B10d 2 X 10

6

MTTFd >100 years ( Based on usage rate of 360 days/year, 24 hours/day, 10 operations/hour )
Tm(mission time) 20 years
DC 96.5%
SFF 98.2%

TECHNICAL SPECIFICATIONS

Document Number : 340-400-IDv1-3b

Notes

In the interest of product development specifi cations are
subject to change without notice.

It is the responsibility of the user to ensure compliance with
any acts or by-laws in place.

All information regarding Mechan equipment is believed to
be accurate at the time of printing. Responsibility cannot be
accepted for errors or omissions.

Maintenance

It is recommended to check the safe operation of the of the
switches and look for signs of damage or excessive wear
on a weekly basis. Damaged units should be replaced or
returned to the manufacturer for repair where practical.

MECHAN CONTROLS PLC

14/16 SEDDON PLACE, STANLEY INDUSTRIAL ESTATE

SKELMERSDALE , LANCASHIRE WN8 8EB

UNITED KINGDOM

Telephone :[phone]

web : www.mechancontrols.co.uk

Declaration of Conformity

We hereby declare that the products identified below conform to the relevant Essential Health & Safety Requirements of the European
Machinery Directive (2006/42/EC),EMC Directive(2004/108/EC) and other relevant EC Directives as listed below.

Mechan Product Standards

HE Series
SCU-1 Safety Control Unit

HE-1 Safety Switches
HE-2 Safety Switches
HED Safety switches
HE-3 Safety Switches
HE-4 Safety Switches
HE-6 Safety Switches
HE-M40 Safety Switches

BS EN60204-1:2006

–

Safety of Machinery, Electrical equipment of machines. General requirements.

BS EN60947-5-3:1999 + AMD 1 04.2005 – Low voltage switchgear and control gear –
Part 5-3: Control circuit devices and switching elements – Requirements for proximity devices with defined behaviour under fault conditions.

BS EN60947-5-1:2004 – Low voltage switchgear and control gear –
Part 5-1: Control circuit devices and switching elements – electro- mechanical control circuits.

EN ISO 13849-1 : 2008 Safety of Machinery, Safety –related Parts of Control Systems

EN 62061 : 2005 Safety of Machinery,-- Functional Safety of Safety elated electrical ,electronic and programmable electronic Control
Systems
EN ISO 14119:2013 – Safety of Machinery, Interlocking devices associated with guards- Principles for design and selection.

BS EN61000-6-4:2007 – EMC Generic emission standard. Industrial.
BS EN61000-6-2:2005 – EMC Generic immunity standard. Industrial.

EC-type examination No. 44 205 10 385597 Notified body 0044, TÜV NORD CERT GmbH, Langemarckstr. 20, 45141 Essen, Germany.

[ 2002/95/EC Restriction of the use of certain Hazardous substances (RoHs) ]

The overall machine must comply with the machinery directive. For further information please contact Mechan Controls Plc.

Authorized Signature

W. Boardman

WA Boardman, Managing Director – July 2015

Mechan Controls Plc

14 Seddon Place, Stanley Industrial Estate, Skelmersdale, Lancashire, England WN8 8EB

Tel: [phone] Fax: [phone] WEB: www.mechancontrols.co.uk