System Manual
Non-contact Safety System
CES-A-W5H-01 (Multicode)
More than safety.
System Manual Safety System CES-A-W5H-01
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Contents
Correct Use 3
Possible combinations for CES components
4
Exclusion of Liability and Warranty
General Safety Instructions
System Description
Block diagram
Changing the approach direction
Installation
Electrical Connection 1
Safety in case of faults 1
Safety switch CES-A-W5... 1
Voltage drop as a function of switching current and cable length (examples) 1
Correct connection 1
Connection example 1
CES-A-W5H-01 1
Pin assignment safety switch CES-A-W5... 1
LED indicators 1
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5
6
7
8
9
1
2
3
3
4
5
5
6
6
Reset 1
Functional check 1
System Status Table 1
Technical Data 1
Safety switch CES-A-W5... 1
Actuator CES-A-BPA 2
Actuator CES-A-BBA/CES-A-BCA 2
Inspection and Service 2
Service 2
Declaration of Conformity 2
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System Manual Safety System CES-A-W5H-01
Correct Use
The Coded Electronic Safety switches series CES are safety devices for monitoring movable safety guards.
In combination with a separating safety guard and the machine control, this safety
component prevents dangerous machine movements from occurring while the
safety guard is open. A stop command is triggered if the safety guard is opened
during the dangerous machine function.
Before safety switches are used, a risk assessment must be performed on the
machine in accordance with:
EN ISO 13489-1, Safety of machinery. Safety related parts of control systems.
General principles for design
EN ISO 14121-1, Safety of machinery. Risk assessment. Principles
IEC 62061, Safety of machinery – Functional safety of safety-related electrical,
electronic and programmable electronic control systems.
Correct use includes compliance with the relevant requirements for installation
and operation, in particular
Important!
EN ISO 13489-1, Safety of machinery. Safety related parts of control systems.
General principles for design
EN 1088, Safety of machinery. Interlocking devices associated with guards.
Principles for design and selection
EN 60204-1, Safety of machinery. Electrical equipment of machines. General
requirements
EN 60947-5-3 Specification for low-voltage switchgear and controlgear. Con-
trol circuit devices and switching elements. Requirements for proximity devices
with defined behaviour under fault conditions (PDF)
The safety switches CES-A-W5... are only allowed to be operated in conjunction
with the designated actuators and the related connection cable from EUCHNER.
On the use of a different actuator or another connection cable, EUCHNER provides
no warranty for safe function.
The devices are intended for use in safety circuits and, together with
connected evaluation units, permit safety functions according to
DIN EN ISO 13849-1: 2008-12 - Table 8, such as a safety-related stop function, prevention of unexpected start-up, etc.
The safety-related function of the PDF is switch-off (low) of one of the
outputs (LA, LB) when the actuator is absent.
The user is responsible for safe integration of the device in a safe overall
system. For this purpose the overall system must be validated, e.g. in accordance with EN ISO 13849-2.
The permissible operating parameters must be observed for correct use
(see Technical data).
If a product data sheet is included with the product, the information on the
data sheet applies in case of discrepancies with the operating instructions.
Only components may be used that are permissible in accordance with the
table below.
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System Manual Safety System CES-A-W5H-01
4
Possible combinations for CES components
Actuator
Safety switch
CES-A-BBA
071840
CES-A-W5H-01
097525
Combination possible
Combination possible, guard locking for process protection
Key to symbols
Combination possible, guard locking for personal protection
Combination not permissible
CES-A-BCA
088786
CES-A-BDA
084720
CES-A-BMB
077791
CES-A-BQA
098108
CES-A-NBA-...
All items
CES-A-BPA
098775
Exclusion of Liability and Warranty
In case of failure to comply with the conditions for correct use stated above, or
if the safety instructions are not followed, or if any servicing is not performed as
required, liability will be excluded and the warranty void.
System Manual Safety System CES-A-W5H-01
General Safety Instructions
Check the safe function of the safety guard particularly
after any setup work
after the replacement of a CES component
after an extended period without use
after every fault
Independent of these checks, the safe function of the safety guard should be
checked at suitable intervals as part of the maintenance schedule.
Warning!
Danger of fatal injury in the event of incorrect connection or incorrect use.
Safety switches must not be bypassed (bridging of contacts), turned away,
removed or otherwise rendered ineffective.
On this topic pay attention in particular to the measures for reducing the possibility of bypassing from EN 1088:1995+A2:2008, section 5.7.
The device is only allowed to be installed and placed in operation by authorized
personnel
who are familiar with the correct handling of safety components
who are familiar with the applicable EMC regulations
who are familiar with the applicable regulations on health and safety
who have read and understood the operating instructions and the system
manual
Important!
Prior to use, read the operating instructions and the system manual of the CES
components used, and keep these in a safe place. Ensure the operating instructions and the system manual are always available during mounting, setup and
servicing. EUCHNER cannot provide any warranty in relation to the readability
of the CD for the storage period required. For this reason you should archive
a printed copy of the system manual. If you should lose the operating instructions or the system manual, you can download these documents from www.
EUCHNER.de.
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System Manual Safety System CES-A-W5H-01
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System Description
As the unique actuator codes are not evaluated, the CES-A-W5... version can only
be used for applications in which a hazard cannot result from possible tampering
with the system.
The safety switch CES-A-W... meets the following safety requirements:
Category 4, PLe according to EN ISO 13849-1
Proximity device with self-monitoring type PDF-M according to EN 60947-5-3.
Redundant design of the circuit in the evaluation unit with self-monitoring. As a
result, the safety system is still effective even if a component fails.
The switching state of the semiconductor outputs is checked internally when
the safety guard is opened and closed.
The CES non-contact safety system consists of three components:
Coded actuator
Safety switch with integrated read head
Evaluation unit
On the safety switch CES-A-W... the read head is integrated with the evaluation unit
in a standard housing according to EN 60947-5-2.
Each delivered actuator possesses a unique electronic coding and so is a unique
element in the system used. The code in an actuator cannot be reprogrammed.
Unlike systems with unique code detection, on the CES-A-W5... a specific code
is not requested but instead it is only checked whether the actuator is of a type
that can be detected by the system (multicode detection). There is no exact comparison of the actuator code with the code defined in the evaluation unit (unique
code detection).
The evalation unit with integrated read head is fastened to the fixed part of the
safety guard.
The actuator fastened to the movable part of the safety guard is moved towards the
read head by closing the door. When the switch-on distance is reached, power is
supplied to the actuator by the inductive read head and data can be transferred.
If a permissible code is detected, the safety outputs (semiconductor outputs)
are enabled, and the door monitoring output (semiconductor output) is also set
HIGH.
Due to the combination of dynamic polling of the actuator and the redundant,
diverse design of the safety electronics with the two feedback safety outputs, the
evaluation unit will enter the safe state with every detectable fault.
When the safety guard is opened, the safety outputs switch off the safety circuit
and the door monitoring output (OUT) is switched LOW. The state of the safety
outputs is monitored internally by two microprocessors.
On an internal fault in the evaluation unit, the safety circuit is switched off and the
OUT/ERROR LED illuminates red.
The evaluation unit has a redundant switching design with self-monitoring. This
means that the safety system is still effective even if a component fails.
System Manual Safety System CES-A-W5H-01
1
2
3
4
5
6
7
8
0V
+ U
LA
LB
OUT
+LA
-LAB
+LB
B
I1
O1
0 V
0 V
E2
I9
O9
0 V
0 V
0 V
OUT
DC +24 V
+LB
-LAB
LB
+LA
LA
+ U
0V
(RD)
(BU)
(YE)
(PK)
(GN)
(GY)
(BN)
(WH)
+LA
LA
R
B
-LAB
+
-
Trans-
ponder
Pin assignment:
Common ground for output A and B
Load A
Pin
Core color
WH/white
BN/brown
GN/green
YE/yellow
GY/gray
PK/pink
BU/blue
RD/red
Function
Coded
actuator
Read head with
evaluation unit
CES-A-W5...
Housing:
118 x 40 x 40 mm
Connection:
M 12x1
8-pin, screened
Read head
Safety input
Pulsed output
Input
Safety input
Pulsed output
Output circuit:
Screen bonding clamp
The screen on the connection cable
is connected internally to the screen
bonding clamp on the housing.
Safety PLC
with static /
dynamic signals
Connection example with safety PLC
Power
supply
for load A
Test pulse 0
Test pulse 1
Block diagram
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System Manual Safety System CES-A-W5H-01
8
Changing the approach direction
Caution!
Risk of damage to equipment as a result of trapped cables.
Make sure that the cables are not trapped or torn off when the approach
direction is changed.
The active face of the read head can be adjusted in 5 directions. It is marked by
the red face.
Unscrew the screws on the fastening bracket.
1.
Pull the read head from the fastening bracket and tilt the read head by 90°
2.
(arrow 2).
The active face is now pointing downward.
Turn the read head by 180° (arrow 3).
3.
Re-tighten the screws for the read head on the fastening bracket. Tightening
4.
torque 0.6 Nm.
Fastening bracket
Housing
Active face
Read
head
Remove the clip from the underside of the housing to change the lateral ap-
5.
proach direction.
Pull the read head off the housing and turn it in 90°-steps in the desired ap-
6.
proach direction.
Fit the read head to the housing and re-fit the clip.
7.
Clip
Housing
Read
head
Other approach directions
System Manual Safety System CES-A-W5H-01
min. 80mm
Operating
distance
Actuator
Operating
distance
Actuator
Flush mounting
Surface maounting
Installation
Caution!
Safety switches must not be bypassed (bridging of contacts), turned away,
removed or otherwise rendered ineffective.
On this topic pay attention in particular to the measures for reducing the pos-
sibility of bypassing according to EN 1088:1995.A2:2008, sec. 5.7.
Caution!
Risk of damage to equipment as a result of incorrect installation. Safety switches
must not be used as a mechanical end stop.
Fit an additional end stop for the movable part of the safety guard.
Important!
From the assured switch-off distance Sar, the safety outputs are safely shut
down.
When mounting several safety switches, observe the stipulated minimum dis-
tance to avoid mutual interference.
If the actuator is installed flush, the switching distance changes as a function
of the installation depth and the safety guard material.
Note the following points:
Actuator and safety switch must be easily accessible for inspection and re-
placement.
The switching operation must only be triggered by the specific actuator desig-
nated for this purpose.
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