Operating instructions
Non-Contact Safety System
CES-AZ-ALS-... (Unicode)
With n-Switching Monitoring Outputs
More than safety.
Operating Instructions Safety System CES-AZ-ALS-...
Contents
Correct use 3
Possible combinations for CES components 4
Exclusion of liability and warranty 4
General safety instructions 5
Function 6
Block diagrams CES-AZ-ALS-... 7
Mounting 8
Electrical connection 10
Safety in case of faults 10
Fuse protection of the power supply and the safety contacts 10
Connection example CES-AZ-ALS-01B 11
Connection example CES-AZ-ALS-02B 12
Connection example CES-AZ-ALS-04B 13
Setup 14
LED indicators 14
Teach-in operation 14
Functional check 16
System status table 18
Technical data 19
Evaluation unit CES-AZ-ALS-01B 19
Evaluation unit CES-AZ-ALS-02B 21
Evaluation unit CES-AZ-ALS-04B 23
Read head CES-A-LNN-... 25
Read head CES-A-LSP-... 27
Read head CES-A-LNA-... 29
Read head CES-A-LNA-SC 31
Read head CES-A-LCA-... 33
Read head CES-A-LQA-SC 35
Read head CES-A-LMN-SC 37
Actuator CES-A-BBN 39
Actuator CES-A-BSP 40
Actuator CES-A-BDN-06 41
Actuator CES-A-BBA/CES-A-BCA 42
Actuator CES-A-BQA 43
Actuator CES-A-BDA 44
Actuator CES-A-BMB 45
Ordering information and accessories 46
Inspection and service 48
Service 48
Declaration of conformity 49
2
Operating Instructions Safety System CES-AZ-ALS-...
Correct use
The Coded Electronic Ssafety switch series CES are a type series of technical
safety devices for monitoring moveable separating 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:
Ì EN ISO 13849-1, Safety of machinery. Safety related parts of control systems.
General principles for design
Ì EN ISO 14121-1, Safety of machinery. Risk assessment. Principles
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 (PDF)
The following components can be connected to the evaluation unit CES-AZ--ALS... :
Ì CES read heads
Ì CEM read heads
Ì CET read heads
Ì CKS Electronic-Key adapter
For further information, refer to the operating instructions of the corresponding
component and to the following table Possible combinations for CES components.
Ì The devices permit a safety-related stop function, initiated by a safety guard
according to Table 8 - DIN EN ISO 13849-1: 2008-12.
Ì The safety-related function of the PDF is the opening of the output
contacts (13/14, 23/24) when the actuator is absent.
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 It is only allowed to use components that are permissible in accordance with
the table below.
3
Operating Instructions Safety System CES-AZ-ALS-...
Possible combinations for CES components
Actuator
Evaluation unit Read head
CES-A-BSP-104970
104970
CES-A-BBN-106600
106600
CES-A-BDN-06-104730
104730
CES-A-BBA
071840
CES-A-BCA
088786
CES-AZ-ALS-01B
On request
CES-AZ-ALS-02B
On request
CES-AZ-ALS-04B
113090
CES-A-LSP-...
All items
CES-A-LNN-...
All items
CES-A-LCA-...
All items
CES-A-LNA-...
All items
CES-A-LQA-SC
095650
CES-A-LMN-SC
077790
CEM-A-LE05K-S2
094800
CEM-A-LE05R-S2
095792
CEM-A-LH10K-S3
095170
CEM-A-LH10R-S3
095793
CET1-AX-LRA-...
095735
CET1-AX-LDA-...
100399
CKS-A-L1B-...
113130
20
15 19
15 15 16
15 15 16
15 15 23
CES-A-BQA
098108
CES-A-BDA
084720
5
CES-A-BMB
077791
CEM-A-BE05
094805
CEM-A-BH10
095175
CET-A-BWK-50X
096327
CKS-A-BK1...
CKS key
●
●
15 Combination possible, typ. switch-on distance 15 mm
Key to symbols
Combination possible
Combination possible, guard locking for process protection
Combination possible, guard locking for personal protection
Combination not permissible
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 Safety System CES-AZ-ALS-...
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 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 and keep these in a safe place.
Ensure that the operating instructions are always available during mounting,
setup and servicing work. 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 operating instructions. You can download
the operating instructions from www.EUCHNER.de.
5
Operating Instructions Safety System CES-AZ-ALS-...
Function
The safety system CES-AZ-ALS... meets the following safety requirements:
Ì Category 4, PLe according to EN ISO 13849-1
Ì Proximity device with self-monitoring type PDF-M according to EN 60947-5-3
Ì 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.
Ì When the safety guard is opened and closed, it is checked whether the safety
system relays open and close correctly.
The non-contact safetysystem CES consists of three components:
Ì Coded actuator
Ì Read head
Ì Evaluation unit
The number of read heads that can be connected depends on the evaluation unit:
CES-AZ-ALS-01B
CES-AZ-ALS-02B
CES-AZ-ALS-04B ¨ 4 read heads
It is also possible to connect a start button (monitoring of the falling edge) and a
feedback loop for monitoring external relays and contactors.
The individual configuration is defined by a setup procedure.
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.
The read heads are fastened to the fixed part of the safety guard and are each
connected to the evaluation unit via a two-core screened cable.
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 read head by induction and data can be transferred.
The bit pattern read is compared with the code saved in the evaluation unit. If the
data match, the door monitoring output O1 orO1...O2 or O1...O4 (semiconductor
outputs, n-switching) on the related read head are set LOW . If all data for all read
heads activated match, the safety outputs (relay outputs) are then enabled. The
OUT LED illuminates.
Optionally, a feedback loop can be connected to the evaluation unit. The evaluation
unit can then only be started with the feedback loop closed. A welded contactor
contact in the release path will thus be detected the next time the machine is started.
¨ 1 read head
¨ 2 read heads
Due to the combination of dynamic polling of the actuators and the redundant,
diverse design of the safety electronics with two safety outputs, the evaluation
unit will enter the safe state with every detectable fault.
When a safety guard is opened, the safety outputs switch off the safety circuit and
the OUT LED goes out. The state of the safety outputs is monitored internally by
positively driven NC contacts (relay output).
Independent of the switching state of the safety circuit, the position of all safety
doors can be polled via the outputs O1 or O1...O2 or O1...O4.
If an internal fault occurs in the evaluation unit, the safety circuit is switched off,
the diagnostic output (DIA) is set LOW and the DIA LED illuminates red.
The device can be reset using the Reset button.
6
Operating Instructions Safety System CES-AZ-ALS-...
Block diagrams CES-AZ-ALS-...
CES-AZ-ALS-01B
UB, 0V Power supply
J, 0V Jumper for teach-in operation
H11/H12 Connection read head 1
SH1 Screen read head 1
TST Test input (see Self-test with test
O1 Semiconductor monitoring output
DIA Diagnostics output
13, 14 Connection for relay contact A,
23, 24 Connection for relay contact B,
Y1, Y2 Feedback loop
S Connection for start button
input TST page 16)
safety relay enable
safety relay enable
(monitoring of the falling edge)
Activation of the
teach-in operation
with jumper on
J, 0V.
0V
UB
J
CES-AZ-ALS-01B
TST
SH1
O1
Transponder
Readhead
H11
1
H12
EUCHNER
+
K2
K1
DIA
+
23 24
13 14
Y1 Y2 S
UB, 0V Power supply
J1, J2 Jumper for teach-in operation
H11/H12, H21/H22 Connection read heads 1 and 2
SH1, SH2 Screen read heads 1 and 2
TST Test input (see Self-test with test
O1, O2 Semiconductor monitoring
DIA Diagnostics output
13, 14 Connection for relay contact A,
23, 24 Connection for relay contact B,
Y1, Y2 Feedback loop
S Connection start button
input TST page 16)
outputs
safety relay enable
safety relay enable
(monitoring of the falling edge)
CES-AZ-ALS-02B
Activation of the
teach-in operation
with jumper on
J1, J2.
0V
UB
J1 J2 SH1
H11
CES-AZ-ALS-02B
TST
O1
CES-AZ-ALS-04B
Activation of the
teach-in operation
with jumper on
J1, J2.
Transponder
Readhead
H12
O2
Transponder
Readhead
1
EUCHNER
1
K2
SH2
+
K1
Transponder
Read-
H21
DIA
Transponder
Read-
head
head
2
H22
+
23 24 13 14
2
Transponder
Readhead
3
Y1 Y2 S
Transponder
Readhead
4
UB, 0V Power supply
J1, J2 Jumper for teach-in operation
H11/H12...H41/H42 Connection for read heads 1...4
SH1...SH4 Screen read heads 1...4
TST Test input (see Self-test with test
O1...O4 Semiconductor monitoring
DIA Diagnostics output
13, 14 Connection for relay contact A,
23, 24 Connection relay contact B,
Y1, Y2 Feedback loop
S Connection for start button
input TST page 16)
outputs
safety relay enable
enable safetyrelay
(Monitoring of the falling edge)
0V
UB
CES-AZ-ALS-04B
113090
TST
J1 J2
SH1
O1
H11
O2
H12
7
EUCHNER
K2
O3
SH2
O4
H21
+
K1
DIA
H2223SH3
+
24
H31
13
H3214SH4
Y1
H41
Y2
H42
S
Operating Instructions Safety System CES-AZ-ALS-...
Mounting
Caution!
Safety switches must not be 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 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 standard rails.
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.
Caution!
Risk of damage to equipment as a result of incorrect installation. Read heads
or actuators must not be used as a mechanical end stop.
Ì Fit an additional end stop for the movable part of the safety guard.
Important:
Ì From the assured switch-off distance S
the safety outputs are safely shut
ar
down.
Ì When mounting several read heads, observe the stipulated minimum distance
to avoid mutual interference.
- For CES-A-LNA/-LCA s
- For CES-A-LMN s
- For CES-A-LQA s
= 50 mm
min.
= 20 mm
min.
min.
= 80 mm
s
min
Ì If the actuator is installed fl ush, the switching distance changes as a function
of the installation depth and the safety guard material.
Flush mounting Surface mounting
Operating
Actuator
distance
Actuator
Operating
distance
8
Operating Instructions Safety System CES-AZ-ALS-...
Note the following points:
Ì Actuator and read head must be easily accessible for inspection and replace-
ment.
Ì The switching operation must only be triggered by the specific actuator desig-
nated for this purpose.
Ì Actuator and read head must be fitted so that
Ì the front faces are at the minimum switch-on distance 0.8 x S
when the safety guard is closed (see section Operating distances). To avoid
entering the area of possible side lobes, a minimum distance is to be maintained in case of a side approach direction. See section Typical operating
distance for the related actuator.
Ì when the safety guard is open up to the distance S
tance), a hazard is excluded.
Ì the actuator is positively mounted on the safety guard, e.g. by using the
safety screws included.
Ì they cannot be removed or tampered with using simple means.
Ì Pay attention to the maximum tightening torque for the read head or safety
switch and actuator mountings of 1 Nm. For read heads/actuators made of
PE-HD, the maximum tightening torque is only 0.5 Nm.
or closer
ao
(assured switch-off dis-
ar
9
Operating Instructions Safety System CES-AZ-ALS-...
Electrical connection
Warning!
In case of an error, loss of the safety function through incorrect connection.
Ì Door 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 IEC EN 61558-2-6 with limited output voltage in the event of a fault, or by other equivalent isolation measures.
Ì All electrical outputs must have an adequate protective circuit for inductive
loads. The outputs must be protected with a free-wheeling diode for this purpose.
Ì Use cable material made of copper with a temperature resistance of min.
75 °C.
Ì The tightening torque for the screws on the connection terminals must be
0.6 ... 0.8 Nm.
Ì The connection cable for the read heads must only be extended using
EUCHNER plug connectors and adequate consideration must be given to
EMC. Intermediate terminals must not be used.
Ì The screen on the connection cable for the read head must be connected
to the appropriate terminal SH1 ... 4 on the evaluation unit. The portion of
cable from which insulation is stripped should be kept as short as possible
(max. 3 cm).
Safety in case of faults
Ì The operating voltage U
Ì The connections for the read heads are not short circuit-proof.
Ì A short circuit between 13/14 and 23/24 can be detected only by means of
external pulsing.
Ì A short circuit in the cable can be excluded by laying the cable with protection.
is reverse polarity protected.
B
Fuse protection of the power supply and the safety
contacts
Ì Provide external contact fuses (6 A gG fuse or 6 A circuit breaker, characteris-
tic B or C) for relay outputs.
Ì The power supply is to be protected with a max. 8A fuse before terminal U
.
B
10
Operating Instructions Safety System CES-AZ-ALS-...
Connection example CES-AZ-ALS-01B
24 VDC
Trans-
ponder
-F1
-F2
0V
UB
CES-AZ-ALS-01B
TST
J SH1
O1
Readhead
H11
1
H12
EUCHNER
K2
+
K1
DIA
+
23 24
13 14
Y1
Y2
L2
L1
-K3
L3
13
23
33
14
24
34
Start
13
23
-K4
14
S
-M1
33
24
34
M
~
3
GND
Important:
21
-K4
22
21
-K3
22
-V1
-K3
A1
-V2
A2
-K4
A1
A2
feedback loop
To achieve category 4 according to EN ISO 13849-1 it is necessary to monitor
the downstream contactors (here contacts on -K3 and -K4 in the feedback loop).
This example shows only an excerpt that is relevant for connection of the CES
system. The example illustrated here does not show complete system planning.
The user is responsible for safe integration in the overall system.
If only one enable path is to be used for control (e. g. of downstream contactors),
failures involving a short circuit between the contacts on the enable path and, for
example, the power supply must be excluded.
With reference to EN ISO 13849-2 Table D.5, this exclusion can be provided if
Ì the cables are inside an electrical installation space and
Ì the enclosure meets the related requirements (see EN 60204-1 or IEC 60204-1).
This example shows only an excerpt that is relevant for connection of the CES
system. The example illustrated here does not show complete system planning.
The user is responsible for safe integration in the overall system.
11
Operating Instructions Safety System CES-AZ-ALS-...
Connection example CES-AZ-ALS-02B
24 VDC
-F1
-F2
0V
UB
CES-AZ-ALS-02B
TST
J1 J2 SH1
O1
Trans-
ponder
Readhead
H11
O2
1
H12
EUCHNER
SH2
K2
+
K1
Transponder
Readhead
H21
DIA
2
H22
+
23 24
13 14
Y1
Y2
L2
L1
-K3
L3
13
23
33
14
24
34
Start
13
23
-K4
14
S
-M1
33
24
34
M
~
3
GND
Important:
21
-K4
22
21
-K3
22
-V1
-K3
A1
-V2
A2
-K4
A1
A2
feedback loop
To achieve category 4 according to EN ISO 13849-1, it is necessary to monitor
the downstream contactor (here contacts on -K3 and -K4 in the feedback loop).
This example shows only an excerpt that is relevant for connection of the CES
system. The example illustrated here does not show complete system planning.
The user is responsible for safe integration in the overall system.
If only one enable path is to be used for control (e. g. of downstream contactors),
failures involving a short circuit between the contacts on the enable path and, for
example, the power supply must be excluded.
With reference to EN ISO 13849-2 Table D.5, this exclusion can be provided if
Ì the cables are inside an electrical installation space and
Ì the enclosure meets the related requirements (see EN 60204-1 or IEC 60204-1).
This example shows only an excerpt that is relevant for connection of the CES
system. The example illustrated here does not show complete system planning.
The user is responsible for safe integration in the overall system.
12
Operating Instructions Safety System CES-AZ-ALS-...
Connection example CES-AZ-ALS-04B
24 VDC
-F1
-F2
0V
UB
CES-AZ-ALS-04B
113090
TST
J1 J2 SH1
O1
Trans-
ponder
Readhead
H11
O2
1
H12
EUCHNER
SH2
K2
O3
O4
+
K1
Transponder
Readhead
H21
DIA
2
H22
+
23
SH3
24
Transponder
Readhead
H31
13
3
H32
14
SH4
Y1
Transponder
Readhead
H41
Y2
4
H42
S
Start
-K3
-K4
-M1
L2
L1
L3
13
23
33
14
24
34
13
23
33
14
24
34
M
~
3
GND
Important:
21
-K4
22
21
-K3
22
-V1
-K3
A1
-V2
A2
-K4
A1
A2
feedback loop
To achieve category 4 according to EN ISO 13849-1, it is necessary to monitor
the downstream contactor (here contacts on -K3 and -K4 in the feedback loop).
This example shows only an excerpt that is relevant for connection of the CES
system. The example illustrated here does not show complete system planning.
The user is responsible for safe integration in the overall system.
If only one enable path is to be used for control (e. g. of downstream contactors),
failures involving a short circuit between the contacts on the enable path and, for
example, the power supply must be excluded.
With reference to EN ISO 13849-2 Table D.5, this exclusion can be provided if
Ì the cables are inside an electrical installation space and
Ì the enclosure meets the related requirements (see EN 60204-1 or IEC 60204-1).
This example shows only an excerpt that is relevant for connection of the CES
system. The example illustrated here does not show complete system planning.
The user is responsible for safe integration in the overall system.
13
Operating Instructions Safety System CES-AZ-ALS-...
Setup
LED indicators
STATE Green LED State display (multifunction display using flashing modes)
OUT Yellow LED Safety circuit closed
DIA LED red - Operating fault or
- External fault (fault in the feedback loop) or
- Teach-in process not valid or
- Internal device fault or
- TST input activated (function test active)
A detailed description of the LED indicators can be found in the section System
status table page 18.
Teach-in operation
Important:
Before the system forms a functional unit, the parameters are set in the evaluation
unit using a teach-in operation (number of connected read heads, assignment of
the actuators to the read heads, with or without automatic start, with or without
feedback loop). During this process the read heads are activated and the actuator
code taught-in.
These configuration parameters are saved in the non-volatile memory in the evaluation unit.
During the teach-in operation the safety outputs are open. The system is in the
safe state.
Ì During the teach-in operation the following conditions must be met:
Ì There must be no state change, e.g. opening a safety guard or closing a
further safety guard or a change in the signal on the terminals for the start
button and the feedback circuit.
Ì The power supply must not be switched off.
Ì If these conditions are not met, the evaluation unit switches to the safe fault
state (diagnostics LED illuminates) and signals this operating fault with the
STATE LED by 3 short flashes that are repeated every second. The teach-in
operation must be repeated.
Ì The number of teach-in operations is unlimited. The evaluation unit can be
re-configured as often as required.
Ì Actuators cannot be interchanged without a renewed teach-in operation.
Ì An actuator that has not been subjected to teach-in will not be detected by
the related read head.
Ì Even if only one new actuator needs to be taught, a complete new teach-in
operation must be carried out as described in the section Setup .
Ì Do not change DIP switches during operation.
To trigger a teach-in operation, the user must perform the following actions in the
stipulated order:
1. Prepare for teach-in operation
Ì Power supply U
is to be switched off
B
Ì Fit a jumper between terminals J1 and J2 (for CES-AZ-ALS-01B between J
and 0V)
14
Operating Instructions Safety System CES-AZ-ALS-...
2. Set required configuration on DIP switches (activate inputs for read heads)
Switch designation Switch position left (OFF) Switch position right (ON)
1 No read head connected to
2 No read head connected to
3 No read head connected to
4 No read head connected to
5 Automatic start
6 No feedback loop connected Feedback loop connected
3. Set required configuration on machine
Ì Close all doors to be monitored (the actuators must be in the operating
distance of the related read head)
Ì For operating mode Manual start: keep start button closed
Ì For operating mode With feedback loop: keep feedback loop closed
4. Start teach-in operation
Ì Switch on operating voltage
Ì Wait for self-test (STATE LED flashes for approx. 10 seconds at 15 Hz)
Ì Teach-in operation starts (STATE LED flashes at approx. 1 Hz)
Ì Wait for acknowledgement of the teach-in operation (STATE LED goes out
after approx. 10 seconds)
terminals H11, H12, SH1
terminals H21, H22, SH2
terminals H31, H32, SH3
terminals H41, H42, SH4
(No start button connected)
Read head connected to
terminals H11, H12, SH1
Read head connected to
terminals H21, H22, SH2
Read head connected to
terminals H31, H32, SH3
Read head connected to terminals
H41, H42, SH4
Manual start
(Start button connected)
Tip!
5. End teach-in operation
Ì Remove jumper between J1 and J2 (on CES-AZ-ALS-01B between J and 0V)
Ì For operating mode Manual start: start button must be connected
Ì For operating mode With feedback loop: feedback loop must be con-
nected
Ì Press reset button or interrupt operating voltage for at least 10 seconds
Ì Wait for self-test (STATE LED flashes for approx. 10 seconds at 15 Hz)
6. Check all safety guards for effectiveness
Changing the configuration / new actuator
The evaluation unit can be re-configured as often as required. For this purpose you
must proceed as per the first teach-in operation according to the Setup procedure
section.
Faulty actuators can be replaced. Then a complete teach-in operation must be
performed as per the section Setup . The number of teach-in operations is unlimited.
After acknowledging the teach-in operation you can use the monitoring outputs O1
... O4 for the diagnostics. All actuators that are in the operating distance of a read
head at this time are signaled on the related monitoring output. In the case of an
fault you can quickly see which actuators have not been detected, e. g. because it
has been forgotten to close a safety door prior to teach-in.
This function is only available during setup.
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Operating Instructions Safety System CES-AZ-ALS-...
Functional check
After installation and any fault, the safety function must be fully checked. Proceed
as follows:
Warning!
Danger of fatal injury as a result of faults in installation and functional check.
Ì Before carrying out the functional check, make sure that there are no per-
sons in the danger area.
Ì Observe the valid accident prevention regulations.
1. Switch on operating voltage.
Ì The safety switch carries out a self-test.
The green STATE LED flashes for 10 seconds with 15 Hz.
The STATE LED then illuminates continuously.
The OUT and ERROR LEDs do not light up.
2. Close all safety guards.
Ì The machine must not start automatically.
Ì The green STATE LED and the yellow OUT LED light up continuously.
3. Enable operation in the control system.
4. Open the safety guard.
Ì The machine must switch off and it must not be possible to start it as long as
the safety guard is open.
Ì The green STATE LED illuminates continuously; the OUT and ERROR LEDs do
not illuminate.
Repeat steps 2-4 for each safety guard.
Self-test with test input TST
On electromechanical safety switches or magnetic switches, the function test can
be performed by cyclically opening the safety guard.
From category 2 according to EN ISO 13849-1 and in accordance with EN 602041 : 1997 (sec. 9.4.2.4), a function test must be performed on the entire safety
system on start-up or after defined intervals.
Testing of the internal function of the unit is not necessary because the device
monitors itself in real time. Welding of an output contact (relay output) is detected
by the device at the latest the next time the safety guard is opened. A short circuit
in the output cable is not detected by the device.
In addition, the entire safety circuit can be tested without opening the safety guard.
For this purpose, opening of the safety guard can be simulated by applying 24 V
DC to the test input TST.
The safety outputs are switched off, enabling testing of the complete safety circuit.
The diagnostic output DIA of the evaluation unit is also set LOW as a monitoring
function.
When the test input TST is reset, the evaluation unit resets the diagnostic output
DIA to HIGH, the red LED switches off and normal operation continues.
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