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CES-AZ-UBS-01B
User Manual
38 pgs1.66 Mb0

EUCHNER CES-AZ-UBS-01B User Manual

Operating instructions
Non-contact safety system
CES-AZ-UBS-01B (Multicode)
More than safety.
Operating Instructions Safety System CES-AZ-UBS-01B
Contents
Correct Use 3
Exclusion of Liability and Warranty 4
General Safety Instructions 5
Function 6
Block diagram CES-AZ-UBS-01B 7
Installation 8
Electrical Connection 10
Safety in case of faults 10 Fusing of the power supply and the safety contacts 11
Connection examples 12
Commissioning 14
LED indicators 14 Functional Check 14
System Status Table 16
Technical Data 17
Inspection and Service 34
Service 34
Declaration of Conformity 35
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Operating Instructions Safety System CES-AZ-UBS-01B
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:
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--UBS...:
Ì CES read heads Ì CEM read heads Ì CET read heads
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 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.
Ì The permissible operating parameters must be observed for correct use
(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 Only components may be used that are permissible in accordance with the
table below.
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Operating Instructions Safety System CES-AZ-UBS-01B
Possible combinations for CES components
Actuator
Evaluation unit Read head
CES-A-BBA
071840
CES-A-BCA
088786
CES-A-BDA
084720
CES-A-BMB
077791
CES-A-BQA
098108
CES-A-NBA-...
All items
CES-A-LNA...
All items
CES-A-LNA-SC
077715
CES-A-LCA...
All items
CES-A-LMN-SC
077790
CES-A-LQA-SC
CES-AZ-UBS-01B
100064
095650
CEM-A-LE05K-S2
094800
CEM-A-LE05R-S2
095792
CEM-A-LH10K-S3
095170
CEM-A-LH10R-S3
095793
CET1-AX-LRA...
095735
CES-A-BPA
098775
CEM-A-BE05
094805
CEM-A-BH10
095175
CET-A-BWK-50X
096327
Combination possible
Combination possible, guard locking for process protection
Key to symbols
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-UBS-01B
General Safety Instructions
As the unique actuator codes are not evaluated, the CES-AZ-UBS-... version can only be used for applications in which a hazard cannot result from possible tampering with the system.
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!
Important!
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.
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 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-UBS-01B
Function
The safety system CES-AZ-UBS... complies with the following safety requirements:
Ì Category 3, 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 CES non-contact safety systems consist of three components:
Ì Coded actuator Ì Read head Ì Evaluation unit
1 read head may be connected to the evaluation unit CES-AZ-UBS...
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-AZ-UBS... a specific code is not polled 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 read head is fastened to the fixed part of the safety guard and is 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 inductive read head and data can be transferred.
The bit pattern read is compared with the code saved in the evaluation unit; if the data matches, the safety outputs (relay outputs) are enabled and the door monitor­ing output OUT (semiconductor output) is also set HIGH.
Due to the dynamic polling of the actuator and the redundant, diverse design of the safety electronics, 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 circuits and the door monitoring output (OUT) is switched LOW. The state of the safety outputs is monitored internally by positively driven NC contacts (relay output).
If an internal fault occurs in the evaluation unit, the safety circuits are switched off, the diagnostic output (ERROR) is set HIGH and the ERROR LED lights up red.
The safety contacts on evaluation unit can also switch small currents. Since small currents can be switched, the user has the option of connecting the evaluation unit directly to a safe control system.
6
Operating Instructions Safety System CES-AZ-UBS-01B
Block diagram CES-AZ-UBS-01B
Trans­ponder
Read­head
SH1
H11
K2
H12
+
13
14
24 V, 0 V Power supply H11/H12 Connection for read head 1 SH1 Shield for read head 1 TST Test input OUT Semiconductor monitoring output ERR Diagnostic output 13, 14 Relay contact A connection,
23, 24 Relay contact B connection,
safety relay enable
safety relay enable
24 V
0V
24VDC
EUCHNER
CES-AZ-UBS-01B 100412
TST
OUT ERR GND
+
K1
23
24
7
Operating Instructions Safety System CES-AZ-UBS-01B
Installation
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. The distance enables 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 dis-
tance 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
= 80 mm
min
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-UBS-01B
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
(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-UBS-01B
Electrical Connection
Warning!
In case of an error, loss of the safety function through incorrect connection.
Ì The monitoring output OUT must not be used as a safety output. 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 61558-2-6 with limited output voltage in the event of a fault, or by other equivalent isolation measures.
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 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 at least
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 EU-
CHNER 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 terminal SH1 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 connection for the read head is 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
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Operating Instructions Safety System CES-AZ-UBS-01B
Fusing 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 must be protected with a max. 8 A fuse before terminal U
.
B
11
Operating Instructions Safety System CES-AZ-UBS-01B
Connection examples
CES-AZ-UBS-01B with read head CET
24VDC
-F1
-S1
CET1-AX-LRA-00-50X-SA 095735
head
Actuator
Read-
EUCHNER
-A1
SH1
8
3
CES-AZ-UBS-01B
24V
100412
24VDC
0V
TST
H11
2
EUCHNER
H12
1
OUT
6
7
ERR
K1
GND
LED1
SH1
+
K2
H11
4
LED2
5
H12
13
+
14
-V1
-K3
-F2
24V
23
24
-V2
-K4
-M1
PLC
L1
L2 L3
11
12
21
22
feedback loop
M
~
3
GND
Important!
To achieve category 3 according to EN ISO 13849-1, it is necessary to monitor the downstream contactors (here contacts of -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.
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