EUCHNER CES-AR-AES-12 User Manual
Operating Instructions
AR Evaluation Unit
CES-AR-AES-12
More than safety.
Operating Instructions AR Evaluation Unit CES-AR-AES-12
Contents
Correct use 3
Possible combinations on the AR evaluation unit 4
Exclusion of liability and warranty 4
General safety instructions 5
Function 6
Block diagram CES-AR-AES-12 6
Mounting 6
Electrical connection 7
Safety in case of faults 7
Connecting AR switch chain 9
Starting behavior 10
Connecting safety contacts and feedback loop 11
Connecting monitoring outputs on the AR evaluation unit 13
Connection example 14
Setup 15
Status LEDs, control elements and terminal assignment 16
LED indicators 16
Reset button 16
Troubleshooting 16
System status table 17
Technical data 18
Dimension drawing 19
System times for the AR system 19
Ordering information and accessories 20
Inspection and service 20
Service 21
Declaration of conformity 22
2
Operating Instructions AR Evaluation Unit CES-AR-AES-12
Correct use
The AR evaluation unit is used for the central evaluation of safety-related signals
in AR switch chains.
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 or if guard locking is deactivated.
Before safety switches are used, a risk assessment must be performed on the
machine in accordance with:
Ì EN ISO 13849-1, Safety of machinery. Safety related parts of control systems.
General principles for design
Ì EN ISO 12100, Safety of machinery – General principles for design – Risk as-
sessment and risk reduction.
Ì 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!
Ì EN ISO 13849-1, Safety of machinery. Safety related parts of control systems.
General principles for design
Ì EN 1088, Safety of machinery. Interlocking devices associated with guards.
Principles for design and selection
Ì EN 60204-1, Safety of machinery. Electrical equipment of machines. General
requirements
Ì EN 60947-5-3 Specification for low-voltage switchgear and controlgear. Con-
trol circuit devices and switching elements. Requirements for proximity devices
with defined behavior under fault conditions
Only safety switches that are suitable for operation in an AR switch chain can be
evaluated. Check the operating instructions for the related safety switch. Combination with devices that are not suitable for use in an AR switch chain or with devices
from other manufacturers is not permitted. A maximum of 12 safety switches in
an AR switch chain can be connected to the AR evaluation unit CES-AR-AES-12.
Unicode and Multicode version switches can be connected. Unicode and Multicode
versions can be combined in an AR switch chain.
Ì The user is responsible for the integration of the device into a safe overall
system. For this purpose, the overall system must be validated, e.g. in accordance with EN ISO 13849-2.
Ì Correct use requires observing the permissible operating parameters (see
Technical data).
Ì 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.
Ì In the estimation of the PL for the overall system, a maximum value of
100 years can be assumed for the MTTF
EN ISO 13849-1:2008, section 4.5.2. This corresponds to a minimum value
for the PFH
of 2.47x10-8/h.
d
according to the limit value in
d
Ì When up to 11 devices are connected in series, these limit values can be
assumed for the entire switch chain as a subsystem. As a subsystem, this
switch chain achieves PL e.
3
Operating Instructions AR Evaluation Unit CES-AR-AES-12
Important!
Ì In the case of series connection of more than 11 switches in a chain,
the PFH
EN ISO 13849-1:2008, Section 4.5.1.
Ì If the simplified method according to Section 6.3 of EN ISO 13849:2008-12
is used for validation, the Performance Level (PL) might be reduced when
more than 11 devices are connected in series.
Ì It is only allowed to use components that are permissible in accordance with
the table below.
Possible combinations on the AR evaluation unit
Evaluation unit Safety switch
can be calculated according to one of the stated methods in
d
Actuator
AR evaluation unit
CES-AR-AES-12
098 225
Key to symbols
CES-AR-C01...
from V1.1.2
(see rating plate on
the device)
CES-AR-CR2...
from V1.1.2
(see rating plate on
the device)
CES-AR-CL2...
from V1.1.2
(see rating plate on
the device)
CET1/2-AR...
from V1.1.2
(see rating plate on
the device)
CET3/4-AR...
from V1.0.0
(see rating plate on
the device)
/
/
CES-A-BBA
071 840
Combination possible / combination on request
Combination possible, guard locking for process protection
Combination possible, guard locking for personal protection / combination on request
Combination not permissible
CES-A-BCA
088 786
CES-A-BPA
098 775
CES-A-BRN
100 251
CES-A-BLN-R2-100776
100 776
CES-A-BLN-L2-104510
104 510
CES-A-BLN-U2-103450
103 450
CES-A-BDN-06-104730
104 730
CET-A-BWK-50X
096 327
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.
4
Operating Instructions AR Evaluation Unit CES-AR-AES-12
General safety instructions
Safety switches fulfill personal protection functions. Incorrect installation or tampering can lead to severe injuries to personnel.
The number of teach-in and switching operations is saved in the internal memory in
the AR evaluation unit. If necessary, this memory can be read by the manufacturer.
Check the safe function of the safety guard particularly
Ì after any setup work
Ì after the replacement of a CES component
Ì after an extended period without use
Ì 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.
Ì 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.
Important!
The device is only allowed to be installed and placed in operation by authorized
personnel
Ì who are familiar with the correct handling of safety components
Ì who are familiar with the applicable EMC regulations
Ì who are familiar with the applicable regulations on health and safety and ac-
cident prevention
Ì who have read and understood the operating instructions.
Prior to use, read the operating instructions of the CES component used and
keep them in a safe place. Ensure the operating instructions are always available
during mounting, setup and servicing. EUCHNER cannot provide any warranty
in relation to the readability of the CD/DVD for the storage period required. For
this reason you should archive a printed copy of the operating instructions. You
can download the operating instructions from www.EUCHNER.de.
5
Operating Instructions AR Evaluation Unit CES-AR-AES-12
Function
The AR evaluation unit is used to evaluate the individual safety switches in an AR
switch chain and to reliably interrupt a safety circuit.
The unit has two inputs for the connection of an AR switch chain. The safety contacts
are switched as a function of the input signals. Downstream parts of the safety
circuit can be monitored using a feedback loop.
The switching states of the connected safety switches can be signaled by means
of monitoring outputs.
If the actuator on one of the safety switches in the AR switch chain is moved out
of the operating distance or if guard locking is deactivated, the AR evaluation unit
opens its relay contacts and the corresponding monitoring output is switched off.
The system is designed so that failures will not result in the loss of the safety function. The occurrence of failures is detected by cyclic self-monitoring at the latest
at the next demand to close the safety contacts.
The system can be started either manually using a start button or automatically.
UB
UB
X5:4
X6:4
DC 24 V
098225
X6:3
0V
CES-AR
Mounting
X6:2
DIA
Caution!
IA
X8:1
switch chain
X8:3
UB AR
Block diagram CES-AR-AES-12
IB
X8:4
X8:2
0V AR
Moni toring Outputs
X3:1O2X3:2
X3:3O4X3:4O5X7:1O6X7:2O7X7:3O8X7:4O9X4:1
O1
O3
X4:2
O10
X4:3
O11
X4:4
X6:1
O12
OUT AR
X5:1Y2X5:2
Feedback
Loop
Fig. 1: Block diagram AR evaluation unit
Safety switches must not b e bypassed (bridging of contacts), turned away,
removed or otherwise rendered ineffective.
Ì 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.
Ì The AR evaluation unit must be mounted in a control cabinet with a minimum
degree of protection of IP 54. A snap-in element on the rear of the device is
used for fastening to a DIN rail.
Ì If several evaluation units are mounted side by side in a control cabinet with-
out air circulation (e.g. fan), a minimum distance of 10 mm must be maintained between the evaluation units.
This distance enables the heat from the evaluation unit to dissipate.
S
Y1
X5:3
13 23
14 24
33 43
34 44
Important!
Follow the mounting instructions in the accompanying documents for the safety
switches connected.
6
Operating Instructions AR Evaluation Unit CES-AR-AES-12
Electrical connection
Warning!
In case of an error, loss of the safety function through incorrect connection.
Ì Monitoring outputs must not be used as safety outputs.
Ì Lay the connection cables with protection to prevent the risk of short cir-
cuits.
Caution!
Risk of damage to equipment or malfunctions as a result of incorrect connection.
Ì All the electrical connections must either be isolated from the mains supply
by a safety transformer according to IEC 61558-2-6 with limited output voltage in the event of a fault, or by other equivalent isolation measures (PELV).
Ì For use and operation as per the requirements, a power supply with the
feature "for use in class 2 circuits" must be used. The same requirement applies to the safety outputs.
Alternative solutions must comply with the following requirements:
a) Electrically isolated power supply unit with a max. open-circuit voltage of 30
V/DC and a limited current of max. 8 A.
b) Electrically isolated power supply unit in combination with fuse as per UL248.
This fuse should be designed for max. 3.3 A and should be integrated into
the 30 V/DC voltage section.
Ì All electrical outputs and safety contacts must have an adequate protective
circuit for inductive loads. The outputs must be protected with a free-wheeling diode for this purpose.
Ì The tightening torque for the screws on the connection terminals must be
0.6 ... 0.8 Nm.
Ì In order to avoid EMC interference, the physical environmental and operating
conditions at the installation site of the device must comply with the requirements according to the standard EN 60204-1:2006, section 4.4.2 (EMC).
Ì Please pay attention to any interference fields in case of devices such as
frequency converters or induction heating systems. Observe the EMC instructions in the manuals from the respective manufacturer.
Safety in case of faults
Ì The operating voltage U
Ì The connections UB AR and 0V AR for the read heads are not short circuit-
proof.
Ì A short circuit between safety contacts can only be detected by external puls-
ing.
Ì A short circuit in the cable can be excluded by laying the cable with protection.
is reverse polarity protected.
B
7
Operating Instructions AR Evaluation Unit CES-AR-AES-12
Power supply
The power supply of 24 V DC is supplied to the AR evaluation unit. The AR switch
chain must be supplied with DC 24 V DC by the AR evaluation unit.
+24 V
0 V
0V
+UB
+UB
connected together
internally
CES-AR-AES
Fig. 2: Power supply
8
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