Mechan Controls SCU-1 User manual

Keep this guide for future reference
Description
Operation
Applications
Declaration of Conformity
This information is designed to help suitably qualified
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 guard-
ing 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 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-
fied 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 ac-
tuator 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/filling 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 Specification 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 posi-
tion
Circuit X1/X2 requires a momentary N/O
button to initialise reset.
Internal switch is set to the UPPER posi-
tion
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 de-
signed 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 wir-
ing 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 con-
tacts 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 be-
tween 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 specified 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 mil-
limetres.
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 specified operating distance the N/O contact(s) will close and the N/C
contact will open
FUSES - All contacts should have external fuses fitted. 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 106
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 specifications 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