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CES-FD-AP-U-01-xxx
User Manual
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EUCHNER CES-FD-AP-U-01-xxx User Manual

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Operating Instructions
Field Evaluation Unit
CES-FD-AP-M-01-… (Multicode)
CES-FD-AP-U-01-… (Unicode)
More than safety.
Operating Instructions Field Evaluation Unit CES-FD-AP-.-01-…
Contents
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Operating Instructions Field Evaluation Unit CES-FD-AP-.-01-…

About this manual

This manual is valid for all field evaluation units CES-FD-AP-M-01-… (Multicode) and CES-FD-AP-U-01-… (Unicode).

Correct use

The field evaluation units series CES are safety devices for monitoring movable safety guards.
The complete safety system consists of three components:
coded actuator (transponder), read head and field evaluation unit.
- In combination with a separating safety guard and the machine control, this safety system 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 components are used, a risk assessment must be performed on the machine, e. g., 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, for example
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
The unit must be used only in conjunction with the CES read heads and CES ac­tuators from EUCHNER. On the use of different actuators, EUCHNER provides no warranty for safe function.
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Operating Instructions Field Evaluation Unit CES-FD-AP-.-01-…
Important!
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 In the estimation of the PL for the overall system, a maximum value of 100
years can be assumed for the MTTFd according to the limit value in EN ISO 13849-1:2008, section 4.5.2. This corresponds to a minimum value for the PFHd of 2.47x10-8/h.
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.

Possible combinations for CES components

Field evaluation unit Read head
CES-A-LMN-SC
CES-FD-AP-M-…
CES-FD-AP-U-…
Key to symbols
CKS-A-L1B-SC-SC
CES-A-LMN-SC
CKS-A-L1B-SC-SC
077790
113130
077790
113130
CES-A-BMB
077791
Combination possible
Actuator
CKS-A-BK1-RD
113461
Important: Key adapter CKS must not be used as a lockout mechanism in combination with multi­code evaluation.
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Operating Instructions Field Evaluation Unit CES-FD-AP-.-01-…

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.

General safety instructions

Safety switches fulfill personal protection functions. Incorrect installation or tamper­ing can lead to fatal injuries to personnel.
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 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. If you should lose the operating instructions, you can download this document from www.EUCHNER.de.
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Operating Instructions Field Evaluation Unit CES-FD-AP-.-01-…

Function

Field evaluation units series CES-FD-AP make it possible to evaluate CES read heads in the field. The safety outputs on the field evaluation units are connected to the machine control.
The system meets the following safety requirements:
Ì Safety category 4, PLe according to EN ISO 13849-1 Ì Redundant design of the circuit in the unit with self-monitoring Ì This means that the safety system still functions even if an internal component
fails
Ì The switch state of the semiconductor outputs is continuously monitored inter-
nally
Ì Short circuit detection at the safety outputs by pulsed signals
The following switch-on condition applies for the safety outputs FO1A and FO1B (see also System state table and section Typical system times):
Ì Safety guard closed
The system consists of three components: coded actuator (transponder), field evaluation unit and read head.
The read head is connected to the field evaluation unit and reads the actuator code.
Every EUCHNER actuator supplied has an electronic coding (unique coding) that is read by the read head. Only if a correct coding is detected does the system accept the actuator. The code in an actuator cannot be reprogrammed.
Unlike systems with unique code detection, on multicode systems a specific code is not requested but instead it is only checked whether the actuator is of a type that can be detected by the system (multicode detection). There is no exact com­parison of the actuator code with the code defined in the safety switch (unique code detection).
The read head is fastened to the fixed part of the safety guard.
The actuator attached to the movable part of the safety guard is moved towards the read head by closing the door. The read head is connected to the field evaluation unit. When the switch-on distance is reached, power is supplied to the actuator by the read head by induction and data can be transferred.
If a permissible code is detected, the safety outputs are released.
Due to the combination of dynamic polling of the actuator and the redundant, diverse design of the safety electronics with the two feedback safety outputs, the safety switch will enter the safe state with every detectable fault.
When the safety guard is opened, the safety outputs switch off the safety circuit and the monitoring output OD (optional) is switched off. The state of the safety outputs is monitored internally by two microprocessors.
If faults are detected, the safety circuit is switched off and the DIA LED illuminates. In case of devices with a monitoring output OI, the output is switched on.
The field evaluation unit has a redundant switching design with self-monitoring. This means that the safety system is still effective even if a component fails.
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 on the next demand to switch on the safety outputs (e.g. on starting).
If the safety door with the actuator should settle over time, the actuator can drift out of the read head operating distance. The device recognizes this situation and indicates that the actuator is in the limit range. This allows the safety door to be readjusted in time.
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Operating Instructions Field Evaluation Unit CES-FD-AP-.-01-…

Mounting

Caution!
Risk of damage to equipment as a result of incorrect installation. The read head 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
down.
, the safety outputs are safely shut
ar
Ì When mounting several read heads, observe the stipulated minimum dis-
tance to avoid mutual interference.
- For CES-A-LMN s
Note the following points:
= 20 mm
min
min. 20 mm
Ì Actuator, read head and field evaluation unit must be easily accessible for in-
spection and replacement.
Ì The switching operation must only be triggered by the specific actuator desig-
nated for this purpose. For permissible combinations please see the table of possible combinations on page 4.
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). A mini­mum distance dependent on the actuator must be maintained for a side ap­proach direction: - For CES-A-LMN 1.2 mm
Ì when the safety guard is open up to the distance S
tance), a hazard is excluded.
(assured switch-off dis-
ar
or closer
ao
Ì the actuator is positively mounted on the safety guard. Ì pay attention to the maximum tightening torque for the field evaluation unit
mountings of 1 Nm.
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Operating Instructions Field Evaluation Unit CES-FD-AP-.-01-…

Electrical connection

Warning!
In case of an error, loss of the safety function through incorrect connection.
Ì To ensure safety, both safety outputs (FO1A and FO1B) must always be
evaluated.
Ì Monitoring outputs 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 The device generates its own clock signal on the output lines FO1A/FO1B. A
downstream control system must tolerate these test pulses, which may have a duration of up to 0.4 ms. No pulses are output when the safety outputs are switched off.
Ì The inputs on an evaluation unit connected must be positive-switching, as the
two outputs on the safety switch deliver a level of +24 V in the switched-on state.
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 The device tolerates voltage interruptions in the operating voltage U
to 5 ms. Voltage interruptions at UB are also output on the safety and moni­toring outputs.
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. RC interference suppression units must not be used.
Ì Power 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.
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).
of up
B
Important!
If the device does not appear to function when operating voltage is applied (e.g. green STATE LED does not flash), the safety switch must be returned unopened to the manufacturer.
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Operating Instructions Field Evaluation Unit CES-FD-AP-.-01-…
Particularities for operation on decentralized pe­ripheral systems
The version CES-FD-AP-…-.SI-… (M12, 5-pin; pin 5 not assigned) is optimized for connection to decentralized peripheral systems, such as the ET200 series from Siemens. The devices are connected like an OSSD (e.g. like light curtains).
The 5-pin M12 plug connector can be connected directly to the socket of an IP65 field module (e.g. ET200pro) with aid of the connection cables on page 25. If flying leads are used, connection to IP20 input and output modules (e.g. ET200s) is naturally also possible.
Important!
Observe the following notes prior to connection:
Ì Parameter assignment might be required for the input/output modules (see
application example at www.EUCHNER.de, in the area Download Applica­tionen CES).
Ì Additionally observe notes from the control system manufacturer where nec-
essary.

Safety in case of faults

Ì The operating voltage U
Ì The contacts FO1A/FO1B are short circuit-proof.
Ì A short circuit between FO1A and FO1B is detected by the device.
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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