Mitsubishi Electric MELSEC-WS User Manual page 2

3 Conditions of use for the product
(1) Although MELCO has obtained the certification for Product's
compliance to the international safety standards IEC 61508, EN 954-
1/ISO 13849-1 from TUV Rheinland, this fact does not guarantee that
Product will be free from any malfunction or failure. The user of this
Product shall comply with any and all applicable safety standard,
regulation or law and take appropriate safety measures for the system
in which the Product is installed or used and shall take the second or
third safety measures other than the Product. MELCO is not liable for
damages that could have been prevented by compliance with any
applicable safety standard, regulation or law.
(2) MELCO prohibits the use of Products with or in any application
involving, and MELCO shall not be liable for a default, a liability for
defect warranty, a quality assurance, negligence or other tort and a
product liability in these applications.
1) power plants,
2) trains, railway systems, airplanes, airline operations, other
transportation systems,
3) hospitals, medical care, dialysis and life support facilities or
equipment,
4) amusement equipments,
5) incineration and fuel devices,
6) handling of nuclear or hazardous materials or chemicals,
7) mining and drilling,
8) and other applications where the level of risk to human life, health
or property are elevated.
4 Product description
4.1 Safety relay output modules WS0-4RO
The WS0-4RO safety relay output modules make contact-based outputs
with positive-action relay contacts available.
A maximum of four WS0-4ROs can be connected to a MELSEC-WS
system.
The WS0-4RO output modules consist of two independent redundant
switch-off paths.
 Two safe contact-based enabling current paths
 One non-isolated safe enabling current path
 One NC EDM contact for each.
Each safe enabling current path consists of the series-connected relay
contacts of two redundantly operating positive-action relays.
The WS0-4RO module cannot be used independently and always
requires a main module WS0-CPU0/1, see the MELSEC-WS Setting and
monitor tool configuration software.
Every input/output extension module has to be connected to an external
voltage supply in order to supply the outputs.
4.2 Display elements
PWR
K1/K2
K3/K4
4.2.1 Displays
Display Meaning
PWR (green) Supply voltage via safety bus is applied
K1/K2 (green) Relay K1/K2 – safety contacts closed
K3/K4 (green) Relay K3/K4 – safety contacts closed
4.3 Terminal assignment
Affectation des bornes
Assignment Description
Affectation Description
Circuiting relay K1/K2
B1
Relais de mise en circuit K1/K2
Circuiting relay K3/K4
B2
Relais de mise en circuit K3/K4
Safety contacts for switch-off circuit outputs K1/K2
13/14 and 23/24
Contacts de sécurité pour sorties de circuit de
13/14 et 23/24
coupure K1/K2
Safety contacts for switch-off circuit outputs K3/K4
33/34 and 43/44
Contacts de sécurité pour sorties de circuit de
33/34 et 43/44
coupure K3/K4
Feedback EDM K1/K2 NC contact
Y1/Y2
Contact NC de feedback EDM K1/K2
Feedback EDM K3/K4 NC contact
Y3/Y4
Contact NC de feedback EDM K3/K4
NO safety contact K1/K2, current-limited
(see "Technical data")
Y14
Contact de sécurté NO K1/K2, à limitation de
courant (voir "Données techniques")
NO safety contact K3/K4, current-limited
(see "Technical data")
Y24
Contact de sécurté NO K3/K4, à limitation de
courant (voir "Données techniques")
4.4 Wiring example
Application example
 Simultaneous protection from danger (Use of a laser scanner)
Function
Two independent robots are protected with one laser scanner (S3000).
An operator can access the dangerous area through the protective area or
the side gates.
When the operator opens the side gate or crossing the laser-protected
area, the robots stop their operation. Both robots stop when any one of the
emergency stop switches is activated.
Reset the safety device after activation.
Safety
This system meets the performance level d in accordance with
EN/ISO13849-1.
 Wiring
*: The WS0-4RO cannot be used alone. The WS0-4RO performs the
ON/OFF control via the WS0-XTIO.
Connect the output terminals (Q1 to Q4) of the WS0-XTIO to the input
terminals (B1 and B2).
*: Le WS0-4RO ne peut être utilisé seul. Le WS0-4RO exécute les
contrôles ON/OFF via le WS0-XTIO.
Raccorder les bornes de sortie (Q1 à Q4) du WS0-XTIO aux bornes
d'entrée (B1 et B2).
5 Mounting/Dismantling
The MELSEC-WS system is only suitable for mounting
in a control cabinet with at least IP 54 degree of
protection.
ATTENTION
While supply voltage is applied, modules must not be
plugged to nor be removed from the MELSEC-WS
system.
To ensure full electromagnetic compatibility (EMC), the
DIN mounting rail must be connected to functional
earth (FE).
Le système MELSEC-WS ne peut être installé que dans
une armoire de commande avec un degré de
protection IP 54 ou mieux.
Quand la tension d'alimentation est appliquée, les
modules ne doivent pas être enfichés sur ou retirés du
système MELSEC-WS.
Pour garantir totalement la compatibilité
électromagnétique (EMC), le rail de fixation DIN doit
être raccordé à la terre fonctionnelle (FE).
5.1 Steps for mounting the modules
 In a MELSEC-WS system the CPU module WS0-CPU0 or WS0-CPU1
is positioned at the extreme left, the two optional gateways follow
directly. Only then do the safety I/O modules follow. The relais modules
WS0-4RO have to be mounted at the extreme right.
 The modules are located in a 22.5mm wide modular system for 35mm
DIN rails to EN 60715.
 Mount the module in accordance with EN 50274
 The connection between the modules is effected by means of the plug
connection integrated in the housing.
 Ensure that suitable ESD protective measures are also taken during
mounting. Otherwise the FLEXBUS+ bus may be damaged.
2)
1)
3)
 Make sure that the voltage supply of the MELSEC-WS safety controller
is switched off.
 Hang the device onto the DIN rail (1)).
 Ensure that the earthing spring contact is positioned correctly (2)). The
earthing spring contact of the module must contact the DIN rail
securely to allow electrical conductivity.
 Snap the module onto the DIN rail by pressing it lightly in the direction
of the arrow (3)).
 If there are several modules, slide the modules together individually in
the direction of the arrow until the side plug connection latches in.
 Install the end clips on the left and right.