EUCHNER CES-AR-AES-12 User manual

EN
Operating Instructions
AR Evaluation Unit
CES-AR-AES-12

Operating Instructions
AR Evaluation Unit CES-AR-AES-12
2(Translation of the original operating instructions) 2098221-06-08/20
Contents
1. About this document............................................................................................. 4
1.1. Scope............................................................................................................................................4
1.2. Target group ..................................................................................................................................4
1.3. Key to symbols...............................................................................................................................4
1.4. Supplementary documents ..............................................................................................................4
2. Correct use .......................................................................................................... 5
3. Exclusion of liability and warranty ......................................................................... 6
4. Description of the safety function .......................................................................... 7
5. General safety precautions ................................................................................... 8
6. Function............................................................................................................... 9
6.1. Block diagram CES-AR-AES-12.........................................................................................................9
7. Mounting.............................................................................................................. 9
8. Electrical connection .......................................................................................... 10
8.1. Notes about .........................................................................................................................10
8.2. Safety in case of faults..................................................................................................................10
8.3. Power supply................................................................................................................................11
8.4. Connecting AR switch chain...........................................................................................................11
8.5. Starting behavior ..........................................................................................................................12
8.5.1. Connection for monitored, manual start .............................................................................12
8.5.2. Connection for automatic start..........................................................................................12
8.6. Connecting safety contacts and feedback loop ...............................................................................13
8.7. Connecting monitoring outputs of the AR evaluation unit ..................................................................14
8.7.1. Assignment of safety switches to the monitoring output......................................................14
8.8. Connection example .....................................................................................................................15
9. Setup ................................................................................................................. 16
10. Status LEDs, control elements and terminal assignment....................................... 17
10.1. LED displays ................................................................................................................................17
10.2. Reset button ................................................................................................................................17
11. System status table ............................................................................................ 18
12. Technical data .................................................................................................... 19
12.1. Dimension drawing .......................................................................................................................20
12.2. System times for the AR system ....................................................................................................20
12.2.1. Typical system times........................................................................................................20
13. Ordering information and accessories................................................................. 21

3
2098221-06-08/20 (Translation of the original operating instructions)
Operating Instructions
AR Evaluation Unit CES-AR-AES-12
EN
14. Inspection and service ........................................................................................ 21
15. Service .............................................................................................................. 21
16. Declaration of conformity ................................................................................... 22

Operating Instructions
AR Evaluation Unit CES-AR-AES-12
4(Translation of the original operating instructions) 2098221-06-08/20
1. About this document
1.1. Scope
These operating instructions are valid for AR evaluation unit CES-AR-AES-12. These operating instructions, the document
Safety information and any enclosed data sheet form the complete user information for your device.
1.2. Target group
Design engineers and installation planners for safety devices on machines, as well as setup and servicing staff possessing
special expertise in handling safety components.
1.3. Key to symbols
Symbol/depiction Meaning
Printed document
Internet
www Document is available for download at www.euchner.com
DANGER
WARNING
CAUTION
Safety precautions
Danger of death or severe injuries
Warning about possible injuries
Caution slight injuries possible
NOTICE
Important!
Notice about possible device damage
Important information
Tip Useful information
1.4. Supplementary documents
The overall documentation for this device consists of the following documents:
Document title
(document number) Contents
Safety information
(2525460) Basic safety information
Operating instructions
(2098221) (this document)
Internet
www
Possibly enclosed data
sheet Item-specic information about deviations or additions
Important!
Always read all documents to gain a complete overview of safe installation, setup and use of the
device. The documents can be downloaded from www.euchner.com. For this purpose enter the doc.
no. in the search box.

5
2098221-06-08/20 (Translation of the original operating instructions)
Operating Instructions
AR Evaluation Unit CES-AR-AES-12
EN
2. Correct use
The AR evaluation unit is used for the central evaluation of safety-related signals in AR switch chains.
The following applies in combination with a CES switch:
In combination with a movable guard and the machine control, this system prevents dangerous machine functions
from occurring while the guard is open. A stop command is triggered if the guard is opened during the dangerous
machine function.
This means:
ÌStarting commands that cause a dangerous machine function must become active only when the guard is closed.
ÌOpening the guard triggers a stop command.
ÌClosing a guard must not cause automatic starting of a dangerous machine function. A separate start command
must be issued. For exceptions, refer to EN 12100 or relevant C-standards.
The following applies in combination with a CET/CTP switch:
In combination with a movable guard and the machine control, this system prevents the guard from being opened
while a dangerous machine function is being performed.
This means:
ÌStarting commands that cause a dangerous machine function must become active only when the guard is closed
and locked.
ÌThe guard locking must not be released until the dangerous machine function has ended.
Closing and locking a guard must not cause automatic starting of a dangerous machine function. A separate start
command must be issued. For exceptions, refer to EN 12100 or relevant C-standards.
Before the device is used, a risk assessment must be performed on the machine, e.g. in accordance with the following
standards:
ÌENISO13849-1
ÌENISO12100
ÌIEC62061
Correct use includes observing the relevant requirements for installation and operation, particularly based on the following
standards:
ÌENISO13849-1
ÌENISO14119
ÌEN60204-1
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. However, at least 2 switches must be connected.
Unicode and multicode version switches can be connected. Unicode and multicode versions can be combined in an AR
switch chain.
Important!
ÌThe user is responsible for the proper 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.
ÌIt is only allowed to use components that are permissible in accordance with the table below.

Operating Instructions
AR Evaluation Unit CES-AR-AES-12
6(Translation of the original operating instructions) 2098221-06-08/20
Table 1: Possible combinations for CES components
Evaluation unit Safety switch
Actuator
CES-A-BBA
071840
CES-A-BCA
088786
CES-A-BPA
098775
CES-A-BRN
100251
CES-A-BLN-R2-100776
100776
CES-A-BLN-L2-104510
104510
CES-A-BLN-U2-103450
103450
CES-A-BDN-06-104730
104730
CES-A-BBN-C04-115271
115,271
CES-A-BDN-06-104730
104730
CET-A-BWK-50X
096327
A-C-H-...
ESL-H-C30
AR evaluation unit
CES-AR-AES-12
098225
CES-AR-C01...
from V1.1.2
(see type label on the
device)
CES-AR-CR2...
from V1.1.2
(see type label on the
device)
CES-AR-CL2...
from V1.1.2
(see type label on the
device)
CES-I-.-AR-C04
from V1.0.1
(see type label on the
device)
CET1/2-AR...
from V1.1.2
(see type label on the
device)
CET3/4-AR...
from V1.0.0
(see type label on the
device)
CTP-AR
ESL-I-AR
from V1.0.0
Key to symbols
Combination possible
Combination possible, guard locking for process protection
Combination possible, guard locking for personnel protection
Combination not permissible
3. 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.

7
2098221-06-08/20 (Translation of the original operating instructions)
Operating Instructions
AR Evaluation Unit CES-AR-AES-12
EN
4. Description of the safety function
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.
Safety function of the evaluation unit:
ÌThe safety contacts are open when
- one or both safety inputs FI1A/FI1B are switched off
- a fault was detected in the feedback loop
ÌSafety characteristics: category, Performance Level, PFHD(see chapter 12. Technical data on page 19).
NOTICE
You can regard the complete AR device chain as one subsystem during calculation. The following
calculation method applies to the PFHDvalue:
#1
PFHD,1 PFHD,CES-AR-AES12
AR-Device #1 ... n CES-AR-AES
Evaluation Unit
PFHDges =∑ PFHD,k + PFHD,CES-AR-AES-12
n
k=1
#2
PFHD,2
#n
PFHD,n
Alternatively, the simplied method according to section 6.3 of EN 13849-1:2015 can be used for
calculation.
The AR switch chain subsystem, in combination with evaluation unit CES-AR-AES-12, complies with
PLe, category 4 according to EN 13849-1.

Operating Instructions
AR Evaluation Unit CES-AR-AES-12
8(Translation of the original operating instructions) 2098221-06-08/20
5. General safety precautions
Safety switches fulll personnel protection functions. Incorrect installation or tampering can lead to fatal injuries to personnel.
Check the safe function of the safeguard particularly
Ìafter any setup work
Ìafter the replacement of a system component
Ìafter an extended period without use
Ìafter every fault
Independent of these checks, the safe function of the safeguard should be checked at suitable intervals as part of the
maintenance schedule.
WARNING
Danger to life due to improper installation or due to bypassing (tampering). Safety components fulll
a personnel protection function.
ÌSafety components must not be bypassed, turned away, removed or otherwise rendered ineffec-
tive. On this topic pay attention in particular to the measures for reducing the possibility of bypass-
ing according to ENISO14119:2013, section 7.
ÌMounting, electrical connection and setup only by authorized personnel possessing the following
knowledge:
- specialist knowledge in handling safety components
- knowledge about the applicable EMC directives
- knowledge about the applicable regulations on operational safety and accident prevention.
Important!
Prior to use, read the operating instructions and keep these in a safe place. Ensure the operating
instructions are always available during mounting, setup and servicing. For this reason you should
archive a printed copy of the operating instructions. You can download the operating instructions from
www.euchner.com.

9
2098221-06-08/20 (Translation of the original operating instructions)
Operating Instructions
AR Evaluation Unit CES-AR-AES-12
EN
6. 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 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 actuating range 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.
6.1. Block diagram CES-AR-AES-12
UB
X5:4
0V
X6:3
switch chain Monitoring Outputs
Feedback
Loop
13 23
14 24
33 43
34 44
098225
DC 24 V
O1
X3:1
O2
X3:2
0V AR
X8:4
UB AR
X8:3
S
X5:3
DIA
X6:2
IB
X8:2
Y1
X5:1
Y2
X5:2
IA
X8:1
O3
X3:3
O4
X3:4
O5
X7:1
O6
X7:2
O7
X7:3
O8
X7:4
O9
X4:1
O10
X4:2
O11
X4:3
O12
X4:4
OUT AR
X6:1
UB
X6:4
CES- AR
Figure 1: Block diagram of AR evaluation unit
7. Mounting
CAUTION
Safety switches must not be bypassed (bridging of contacts), turned away, removed or otherwise
rendered ineffective.
ÌObserve ENISO14119:2013, section 7, for information about reducing the possibilities for by-
passing an interlocking device.
ÌThe AR evaluation unit must be mounted in a control cabinet with a minimum degree of protection
of IP54. A snap-in element on the rear of the device is used for fastening to standard rails.
ÌIf several evaluation units are mounted side by side in a control cabinet without 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.
Important!
Follow the mounting instructions in the accompanying documents for the safety switches connected.

Operating Instructions
AR Evaluation Unit CES-AR-AES-12
10 (Translation of the original operating instructions) 2098221-06-08/20
8. Electrical connection
WARNING
In the event of a fault, loss of the safety function due to incorrect connection.
ÌMonitoring outputs must not be used as safety outputs.
ÌLay the connecting cables with protection to prevent the risk of short circuits.
CAUTION
Risk of damage to equipment or malfunctions as a result of incorrect connection.
ÌAll 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).
ÌAll electrical outputs must have an adequate protective circuit for inductive loads. The outputs
must be protected with a free-wheeling diode for this purpose.
ÌThe tightening torque for the screws on the connection terminals must be 0.6 ... 0.8 Nm.
ÌPower devices which are a powerful source of interference must be installed in a separate location
away from the input and output circuits for signal processing. The cable routing for safety circuits
should be as far away as possible from the cables of the power circuits.
ÌTo avoid EMC interference, the physical environmental and operating conditions at the in-
stallation site of the device must comply with the requirements according to the standard
EN60204-1:2006, section 4.4.2 (EMC).
ÌPay attention to any interference elds from devices such as frequency converters or induction
heating systems. Observe the EMC instructions in the manuals from the respective manufacturer.
Important!
If the device does not appear to function when operating voltage is applied (e.g. green STATE LED
does not ash), the device must be returned unopened to the manufacturer.
8.1. Notes about
Important!
ÌThis device is intended to be used with a Class 2 power source in accordance with UL1310.
As an alternative an LV/C (Limited Voltage/Current) power source with the following properties can
be used:
- This device shall be used with a suitable isolating source in conjunction with a fuse in accordance
with UL248. The fuse shall be rated max. 3.3A and be installed in the max. 30VDC power supply
to the device in order to limit the available current to comply with the requirements. Please note
possibly lower connection ratings for your device (see chapter 12. Technical data).
ÌUse cable material made of copper wire with a temperature resistance of at least 75°C.
1) Note on the scope of the UL approval: the devices have been tested as per the requirements of UL508 and CSA/ C22.2 no. 14 (protection against electric shock
and re).
8.2. Safety in case of faults
ÌThe operating voltage UBis reverse polarity protected.
ÌThe connections UB AR and 0V AR for the AR devices are not short-circuit proof.
ÌA short circuit between safety contacts can be detected only by external pulsing.
ÌA short circuit in the cable can be excluded by laying the cable with protection.

11
2098221-06-08/20 (Translation of the original operating instructions)
Operating Instructions
AR Evaluation Unit CES-AR-AES-12
EN
8.3. Power supply
The power supply of DC 24 V is supplied to the AR evaluation unit. The AR switch chain must be supplied with DC 24 V by
the AR evaluation unit.
CES-AR-AES
+UB
0V +UB
+24 V
0 V
PE
connected together
internally
PE must be connected
to A2 for the ground
fault detection
Figure 2: Power supply
8.4. Connecting AR switch chain
The AR evaluation unit has two safety inputs to which the AR switch chain is connected. Safety inputs IA and IB have short
circuit and earth fault monitoring.
The AR switch chain must be supplied by the AR evaluation unit (terminals UBAR and 0VAR). An additional power supply
may be required for these safety switches (e.g. for guard locking), depending on which safety switches are used in the AR
switch chain (see Figure 3). In case of switches with guard locking, the supply for the guard locking solenoid must be at the
potential of the AR evaluation unit. Information on this is provided in the operating instructions of the respective safety switch.
Important!
ÌA maximum of 12 safety switches can be connected, but at least 2 switches must be connected
ÌOnly safety switches that are suitable for operation in an AR switch chain can be connected.
ÌSafety switches with a start input are not suitable for connection to an AR evaluation unit.
ÌIn the case of unicode switches, the actuators must be taught in at the AR device. See the operat-
ing instructions for the related safety switch.
ÌFor the AR system to function, a bridging plug must be connected to the rst safety switch in the
AR switch chain (or a jumper between IA, IB and UBAR).
ÌConnections UBAR and 0VAR must be used only for the power supply of the AR switch chain.
CES-AR-AES
UB
AR
IB 0V
AR
IA
CET-AR # n
CES-AR-C01 # n-1
CES-AR-C.2 # 1
STATE
DIA
Connection for
guard locking
solenoid
Use common ground potential
for AR evaluation unit and
solenoid control.
See Connection example on
page 15.
Figure 3: Schematic diagram showing connection of an AR switch chain

Operating Instructions
AR Evaluation Unit CES-AR-AES-12
12 (Translation of the original operating instructions) 2098221-06-08/20
8.5. Starting behavior
The AR evaluation unit can be put into operation either using the autostart mode or by starting it manually.
Important!
If the conguration for the starting behavior is changed during operation (e.g. jumper removed), this
change will be detected by the unit. The AR evaluation unit assumes the fault state as soon as the next
request to close the safety contacts is received (see chapter 11. System status table on page 18).
8.5.1. Connection for monitored, manual start
For a monitored, manual start, a start button is connected to terminal S. The start button is supplied with a voltage of DC 24
V. The terminal +UB can be used for this purpose. A sticking start button, for example, will be detected by the monitoring
function the next time the system is powered up.
The safety contacts close after max. 600 ms when the start button is pressed and then released again (falling edge) and if
the actuators for all the safety switches connected are within the actuating range.
CES-AR-AES
UB
S
Figure 4: Monitored, manual start
Important!
The start button is allowed to be pressed only approx. 8 s after power on. If the start button is pressed
earlier, the unit will switch to the fault state and the DIA LED illuminates. The STATE LED ashes (see
chapter 11. System status table on page 18).
8.5.2. Connection for automatic start
WARNING
The safety contacts close immediately if all safety switches signal a safe state and the feedback loop
is closed.
CES-AR-AES
Y1
S
Figure 5: Automatic start
For the autostart mode, a jumper must be connected between the terminals S and Y1.
By pulsing the output signal on Y1 the device detects short circuits on starting (e.g. static DC 24 V on the input S).

13
2098221-06-08/20 (Translation of the original operating instructions)
Operating Instructions
AR Evaluation Unit CES-AR-AES-12
EN
8.6. Connecting safety contacts and feedback loop
Important!
If you do not connect the feedback loop, the downstream devices will not be monitored. This situation
will affect the safety category of your system.
The unit has four redundant, positively driven safety contacts that switch off immediately if the actuator is removed at one of
the connected safety switches or if a fault occurs. To check the switching state of a connected load, the monitoring contacts
on a contactor or relay can be connected to terminals Y1 and Y2 to form a feedback loop (see Figure 6).
CES-AR-AES
33 432313
Y2
Y1
24 34 44
14
+24 V
Subsequent
devices
(e.g. contactors)
Figure 6: Safety contacts and feedback loop connected
The unit detects external short circuits on the feedback loop at the start by pulsing the output signal on Y1 (e.g. static
DC24V on the feedback loop).
If a feedback loop is not to be connected, a jumper must be tted to the terminals Y1 and Y2 (see Figure 7).
CES-AR-AES
33 43
23
13
Y2
Y1
24 34 44
14
+24 V
Subsequent
devices
(e.g. contactors)
Figure 7: Safety contacts connected and jumper on the feedback loop

Operating Instructions
AR Evaluation Unit CES-AR-AES-12
14 (Translation of the original operating instructions) 2098221-06-08/20
The following conditions must be met for the safety contacts to be closed:
For manual start
ÌThe feedback loop is closed
ÌThe start button has been pressed and released (switches on falling edge)
ÌAll safety doors closed
For automatic start
ÌThe feedback loop is closed
ÌAll safety doors closed
If the feedback loop is open, the DIA LED ashes and the STATE LED is lit (see chapter 11. System status table on page
18). The monitoring output DIA is set.
The safety contacts remain open if the feedback loop is open at the start. The unit switches to fault state, the DIA LED is lit
and the STATE LED ashes (see chapter 11. System status table on page 18).
8.7. Connecting monitoring outputs of the AR evaluation unit
The AR evaluation unit has 14 short circuit-proof semiconductor monitoring outputs that can be used to signal different op-
erating states, e.g. to a PLC. If the monitoring output is active, a voltage of max. DC 24 V is present at the related terminal
(referred to the potential at terminal 0 V).
O3 O12 OUT
AR
DIA
O2
O1
min. 0,8x UB ; max. 20 mA
Figure 8: Monitoring outputs of the CES-AR-AES
Signicance of the signals with monitoring output active:
ÌO1 ... O12: Status of safety switches 1 ... 12
(actuator in actuating range or guard locking status)
ÌOUT AR: All connected safety switches in state Enable.
(all actuators in actuating range and all guard locking devices active)
ÌDIA: Fault on the AR evaluation unit or on a safety switch in the
AR switch chain, or feedback loop was open during start
(see 11. System status table on page 18)
8.7.1. Assignment of safety switches to the monitoring output
At least one monitoring output is assigned to each safety switch in the AR switch chain. The safety switch with bridging
plug has the monitoring output O1. From here, the output assignments are incremented up to the last switch in the chain.
Several monitoring outputs are occupied depending on the switch type, e.g. one monitoring output for the door position
and one for the guard locking status.
The table below shows how many monitoring outputs the individual safety switches occupy.
Series Number (type) of monitoring outputs Maximum number of switches that can be connected
CES-AR
ESL-AR
1
(door position or diagnostics) 12
CET1/2-AR 1
(status of guard locking) 12
CET3/4-AR
CTP-AR
2
(rst monitoring output: door position, second monitoring output: guard
locking status)
6

15
2098221-06-08/20 (Translation of the original operating instructions)
Operating Instructions
AR Evaluation Unit CES-AR-AES-12
EN
8.8. Connection example
UB
X5:4
0V
X6:3
switch chain Monitoring Outputs
Feedback
Loop
13 23
14 24
33 43
34 44
-K1
098225
DC 24 V
O1
X3:1
O2
X3:2
0V AR
X8:4
UB AR
X8:3
S
X5:3
DIA
X6:2
IB
X8:2
Y1
X5:1
Y2
X5:2
IA
X8:1
O3
X3:3
O4
X3:4
O5
X7:1
O6
X7:2
O7
X7:3
O8
X7:4
O9
X4:1
O10
X4:2
O11
X4:3
O12
X4:4
OUT AR
X6:1
UB
X6:4
CES- AR
Safety Output
-U1
2
UB
7
0V
5
OUT
8
RST
6
IA
3
OA
1
IB
4
OB
CES
Safety Output
Read Head
-U2
2
UB
7
0V
5
OUT
8
RST
6
IA
3
OA
1
IB
4
OB
CES
Safety
Output
Door
Monitoring
Safety
Output
Safety
Inputs
Read Head
Actuator
RD Monitoring
Output
X1:6
IA
X1:1
IB
X2:3
LED1
-B1
24 V DC
X1:2
UB
X2:4
UCM
X2:1
0V(UCM)
X1:8
RST
X1:7
0V
X2:5
J
X2:2
OUTD
X1:3
OA
X1:4
OB
X1:5
OUT
CET
13 14
- S18
24V 0V
24V 0V
Read Head
Figure 9: Connection example of a mixed switch chain with 2 x CES-AR and 1 x CET3/4-AR

Operating Instructions
AR Evaluation Unit CES-AR-AES-12
16 (Translation of the original operating instructions) 2098221-06-08/20
9. Setup
WARNING
ÌPay attention to the notes on setup and on the teach-in process in the operating instructions for
the safety switch used.
ÌObserve correct connection on devices with teach-in input.
Proceed as follows:
1. Ensure nobody can be placed in danger during setup.
2. Prior to setup, check whether all connections are correct (jumpers connected, external circuit correct) and the AR switch
chain is tted with a bridging plug.
3. Close all guards and make sure that the feedback loop on the evaluation unit is closed.
4. Switch on the power supply.
¨The switches in the chain are initialized during starting. Unicode switches that have not yet learned an actuator on starting
learn it automatically. This process can take up to one minute.
5. Subsequently press the RST button on the AR evaluation unit for approx. 3 s to restart the device.
¨If the AR evaluation unit is set up for automatic start, the STATE LED ashes and signals that the self-test is being per-
formed. After the self-test, the OUT and STATE LEDs are continuously lit.
or
¨If you start the AR evaluation unit manually, the STATE LED ashes and signals that the self-test is being carried out. After
the self-test, the STATE LED illuminates continuously. The OUT LED ashes, since no start command has been issued yet.
6. Press the start button (necessary only for manual start).
7. Check the correct function of the safety circuits connected. In case of problems, see chapter 11. System status table
on page 18.
Important!
Use the system status table in chapter 11 to check the overall function. In addition, the status LEDs
on the respective safety switches provide information about the status of the respective switch.

17
2098221-06-08/20 (Translation of the original operating instructions)
Operating Instructions
AR Evaluation Unit CES-AR-AES-12
EN
10. Status LEDs, control elements and terminal assignment
The AR evaluation unit has status LEDs for the most important operating states. The signicance of the individual LED states
is explained in the system status table in chapter 11.
O4
O12
O3
O11
O2
O10
O1
O9
+UB
+UB
0V
S
DIA
Y2
Y1
43
44
33
34
23
24
13
14
CES-AR-AES-12
EUCHNER
Safety Unit
O5
IA
O6
IB
O7
RESET
DIA OUT STATE
O8
OUT
AR
UB
AR 0V
AR
O4
O12
O3
O11
O2
O10
O1
O9
+UB
+UB
0V
S
DIA
Y2
Y1
43
44
33
34
23
24
13
14
CES-AR
EUCHNER
Safety Unit
O5
IA
O6
IB
O7
RESET
DIA OUT STATE
O8
0V
AR
UB
AR
OUT
AR
Figure 10: Terminal assignment, LEDs and reset button
10.1. LED displays
LED Color Meaning
STATE green Device status
OUT yellow Switch chain status
DIA red Fault display
10.2. Reset button
With the reset button pressed, the power supply for the AR evaluation unit and as a result for the entire AR switch chain is
interrupted. After it is released, the AR evaluation unit and the switches connected restart with a self-test.

Operating Instructions
AR Evaluation Unit CES-AR-AES-12
18 (Translation of the original operating instructions) 2098221-06-08/20
11. System status table
Operating mode
Actuator/door position Safety outputs OA and OB
Indicator LEDs Monitoring
outputs
State
DIA (red) OUT (yel- low) STATE (green) OUT AR DIA
Self-test X off 15 Hz
(10 s) off off Self-test after power-up
Normal operation
open off off off Normal operation, at least one door open
closed on on off Normal operation, all doors closed
closed off 3 Hz on off Normal operation, all doors closed, start button not
pressed or fault in the feedback loop
closed off 4 x on on Normal operation, all doors closed, feedback loop was
open during attempt to start
X X X 7 x off on Faulty data transmission for status signals (safety circuit
not affected)
Fault display
X off 1 x off on Fault in the AR switch chain (e.g. fault on starting the
switch chain or more than 12 devices connected)
X off 2 x off on
Fault on the safety outputs or on the start button (e.g.
start conguration changed in operation, no/erroneous
signals from the switch chain, broken cable on one of the
channels IAor IB, or short circuit/ground fault on one of
the channels IAor IB)
X off 4 x off on Fault on the safety relay, re-start device.
If fault is still indicated, contact manufacturer.
X off 5 x off on Internal component fault, re-start device.
If fault is still indicated, contact manufacturer.
X off 6 x off on
-Fault in feedback loop, e.g.
-Feedback loop not connected on power up
-missing jumper between Y1/Y2
or
-Fault on the start button, e.g.
-On autostart: jumper between S/UBinstead of S/Y1
-Start button stuck
X off off on Start failed three times, contact manufacturer
Key to symbols
LED not illuminated
LED illuminated
15 Hz (10 s) LED ashes for 10 seconds at 15 Hz
3 x LED ashes three times
X Any state
Important!
If you do not nd the displayed device status in the system status table, this indicates an internal device
fault. In this case, you should contact the manufacturer.

19
2098221-06-08/20 (Translation of the original operating instructions)
Operating Instructions
AR Evaluation Unit CES-AR-AES-12
EN
12. Technical data
Parameter Value Unit
min. typ. max.
Housing material PA6.6 plastic
Dimensions 114 x 99 x 45 mm
Weight 0.25 kg
Ambient temperature at UB= DC 24 V -20 - +55 °C
Atmospheric humidity, not condensing - - 80 %
Degree of protection IP20
Degree of contamination 2
Mounting Mounting rail 35 mm acc. to EN 60715
Connection (plug-in screw terminals, coded) 0.14 - 2.5 mm²
Operating voltage UB(regulated, residual ripple < 5%) 24 ± 10% V DC
Current consumption IB(with relay energized) 1) - 1,200 1) - mA
External fuse (operating voltage UB) - 2.5 8 A gG
Safety contacts 4 relays with internally monitored contacts
Switching current (relay outputs)
mA
- at switching voltage AC/DC 21 ... 60 V 1 - 300
- at switching voltage AC/DC 5 ... 30 V 10 - 6,000
- at switching voltage AC 5 ... 230 V 10 - 5,000
External fuse (safety circuit) acc. to EN 60269-1 6 AgG or 6 A circuit breaker (characteristic B or C)
Utilization category acc. to EN 60947-5-1 AC-12 60V 0.3A / DC-12 60V 0.3A
AC-12 30V 6A / DC-12 30V 6A
AC-15 230V 5A / DC-13 24V 5A
Rated insulation voltage Ui250 V
Rated impulse withstand voltage Uimp 4 kV
Conditional short-circuit current - 100 - A
Resilience to vibration Acc. to EN 60947-5-2
Mechanical operating cycles (relays) 10 x 106
Current via feedback loop Y1/Y2 5 8 10 mA
Permissible resistance via feedback loop - - 600 W
Monitoring outputs (O1 ... O12, DIA and OUT AR, semicon-
ductor outputs, p-switching, short circuit-proof)
- Output voltage 0.8 x UB- UBV DC
- Max. load - - 20 mA
- Switching frequency - 1 - Hz
Start button S inputs
- Input voltage LOW 0 - 2 V DC
HIGH 15 - UB
- Input current HIGH 5 8 10 mA
Safety inputs IA, IB 2 (for AR switch chain)
- Input current - 10 - mA
Number of connectible safety switches 2 - 12
EMC protection requirements Acc. to EN 60947-5-3
Reliability values acc. to EN ISO 13849-1
as a function of the switching current at 24 V DC ≤0.1 A ≤1 A ≤3 A
Category 4
Performance Level (PL) e
PFHD1.5 x 10-8
Mission time 20 years
Number of switching cycles/year 720,000 540,000 107,000
1) Taking into account the load currents at the monitoring outputs (20 mA each)

Operating Instructions
AR Evaluation Unit CES-AR-AES-12
20 (Translation of the original operating instructions) 2098221-06-08/20
12.1. Dimension drawing
45
99
114
O4
O12
O3
O11
O2
O10
O1
O9
+UB
+UB
0V
S
DIA
Y2
Y1
43
44
33
34
23
24
13
14
CES-AR
EUCHNER
Safety Unit
O5
IA
O6
IB
O7
RESET
DIA OUT STATE
O8
0V
AR
UB
AR
OUT
AR
Suitable for mounting rail
according to DIN 60715
12.2. System times for the AR system
12.2.1. Typical system times
Ready delay: After switching on, the unit carries out a self-test for 10s. The system is ready for operation only after this time.
Risk time according to EN 60947-5-3: If an actuator leaves the actuating range, the safety contacts of the AR evaluation
unit are opened after 520 ms at the latest.
Difference time: The safety contacts on the AR evaluation unit switch with a slight time offset. They have the same signal
state at the latest after a difference time of 10 ms.
Important!
The system times shown are maximum values for a circuit arrangement with 12 safety switches
connected in an AR switch chain. Shorter times can also be achieved in circuits with fewer switches.
t
0
t
0
t
0
=
=
+ 520 mst
off
t
0 + 450 mst off
t
off
t
0
= + 750 mst
off
Normal operation
Fault detection
Short circuit on IA/IB
Actuator removal
or deactivating of
a guard locking
Non-identical input state
on IA/IB or short circuit
on IA or IB
or internal fault
t (ms)
= Safety outputs active
= Switch-off time
= Fault time/event
Figure 11: System times for AR evaluation unit on an AR switch chain with 12 safety switches