EUCHNER CES-A-UEA-04B User Manual

Operating instructions

Non-contact safety system

CES-A-UEA-02B/CES-A-UEA-04B (Multicode)

More than safety.

Operating Instructions Safety System CES-A-UEA-02B/CES-A-UEA-04B

Contents

Correct Use 3

Possible combinations for CES components 4

Exclusion of Liability and Warranty 4

General Safety Instructions 5

Function 6

Block diagram CES-A-UEA-02B 7
Block diagram CES-A-UEA-04B 8

Installation 9

Electrical Connection 11

Safety in case of faults 12
Fusing of the power supply and the safety contacts 12
Connection example CES-A-UEA-02B 13
Connection example CES-A-UEA-04B 14

Setup 15

LED indicators 15
Parameter setting 15
Functional check 17

System Status Table 18

Technical Data 19

Evaluation unit CES-A-UEA-02B 19
Evaluation unit CES-A-UEA-04B 22
Read head CES-A-LNA... 25
Read head CES-A-LNA-SC 27
Read head CES-A-LCA... 29
Read head CES-A-LQA-SC 31
Read head CES-A-LMN-SC 33
Actuator CES-A-BBA/CES-A-BCA 35
Actuator CES-A-BQA 36
Actuator CES-A-BDA 37
Actuator CES-A-BMB 38

Inspection and service 39

Service 39

Declaration of Conformity 40

2

Operating Instructions Safety System CES-A-UEA-02B/CES-A-UEA-04B

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 13489-1, 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 13489-1, 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 behaviour under fault conditions (PDF)

The following components can be connected to the evaluation unit CES-A-UEA...:

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 at least one

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.

3

Operating Instructions Safety System CES-A-UEA-02B/CES-A-UEA-04B

Possible combinations for CES components

Actuator

Evaluation unit

CES-A-UEA-02B

097077

CES-A-UEA-04B

097075

Key to symbols

Read head/safety
switch

CES-A-LNA...

All items

CES-A-LNA-SC

077715

CES-A-LCA...

All items

CES-A-LMN-SC

077790

CES-A-LQA-SC

095650

CEM-A-LE05K-S2

094800

CEM-A-LE05R-S2

095792

CEM-A-LH10K-S3

095170

CEM-A-LH10R-S3

095793

CET1-AX...

All items

CES-A-BBA

071840

CES-A-BCA

088786

CES-A-BDA

084720

CES-A-BMB

077791

CES-A-BQA

098108

Combination possible

Combination possible, guard locking for process protection

Combination possible, guard locking for personal protection

CES-A-NBA-...

All items

CES-A-BPA

098775

CEM-A-BE05

094805

CEM-A-BH10

095175

CET-A-BWK-50X

096327

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-A-UEA-02B/CES-A-UEA-04B

General Safety Instructions

As the unique actuator codes are not evaluated, the CES-A-UEA... 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-A-UEA-02B/CES-A-UEA-04B

Function

The safety system CES-A-UEA... complies with 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 CES non-contact safety system consists of three components:

Ì Coded actuator
Ì Read head
Ì Evaluation unit

1 to 2 read heads can be connected to the CES-A-UEA-02B evaluation unit and 1
to 4 read heads can be connected to the CES-A-UEA-04B evaluation unit.

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.

Unlike systems with unique code detection, on the CES-A-UEA... 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 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...O2 or O1...O4 (semiconductor output)
on the related read head is set HIGH. If all data for all read heads activated match,
the safety outputs (relay outputs) are then enabled. The OUT LED illuminates.

Before the system forms a function unit, the parameters are set in the evaluation
unit by the user (number of connected read heads, with or without automatic start,
with or without feedback loop). During this process the read heads are activated.

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...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 HIGH and the DIA LED illuminates red.

6

Operating Instructions Safety System CES-A-UEA-02B/CES-A-UEA-04B

Block diagram CES-A-UEA-02B

Activation of the
teach-in operation with
jumper
on J1, J2

Operating
voltage

0 V

DC

+ 24 V

0V

ON

J1

H1
H2

S
Y

UB

STATE OUT DIA

1 2

5 6

Coded

actuators

Trans-

Trans-

ponder

ponder

Head 2

Trans-

Trans-

ponder

ponder

AB

Kopf 1 Kopf 2

Head 1

Read heads

J2

H11 H21H12 H22SH1 SH2

Head selection

Head - RF - multiplexer

Kopf - HF - Multiplexer

(1 of 2)

( 1 aus 4 )

Demodulator

Demodulator

Filter

Filter

Verstärker

Amplifier

Komparator

Comparator

CPU-B

(Typ 2)

CPU-B

(type 2)

CPU-A

(Typ 1)

CPU-A

(type 1)

LED

STAT E

OUT

DIA

Star t

Start

CPU-B

CPU-A

DIP switch

KB

KB

TST

+UB, 0 V Power supply
J1, J2 Short circuit bridge for teach-in operation
H11/H12/H21/H22 Connection for read heads 1 ... 2
SH1, SH2 Shield
TST Test input (see „Self-test with test input TST“ page 17)
O1 ... O2 Semiconductor monitoring outputs
DIA Diagnostics output
13, 14 Relay contact A connection, safety relay enable
23, 24 Relay contact B connection, safety relay enable
Y1, Y2 Feedback loop
S Start button connection (monitoring of the falling edge)

O1 O2

DIA

24 Y2

KA

KA

1323 Y1

+24 V

14

CPU-B

CPU-A

S

7

Operating Instructions Safety System CES-A-UEA-02B/CES-A-UEA-04B

Block diagram CES-A-UEA-04B

Activation of the
teach-in operation with
jumper
on J1, J2

Operating
voltage

DC

0 V

+ 24 V

J1

0V

0V

UB

STATE OUT DIA

ON

1 2

3
4
5 6

H1

H2

H3

H4

S

Y

Trans-

Trans-

Trans-

ponder

ponder

A

Kopf 1 Kopf 2 Kopf opf 4

Head 1

J2

H11

H12

SH1

Trans-

ponder

ponder

B

Head 2

H21

H22

SH2

Head -RF - mulitplexer

K

(1 of 4)

( 1 aus 4

Trans-

Trans-

ponder

ponder

C

Head 3 Head 4

H31

H32

SH3

Trans-

Trans-

ponder

ponder

H41

Coded
actuators

D

Read heads

H42

SH4

Head selection

Demodulator

Demodul ator

Filter

Filter

Amplifier

Verstärker

Comparator

Komparat or

LED

STATE

OUT

DIA

CPU-B

(Typ 2)

CPU-B

(type 2)

CPU-A

(Typ 1)

CPU-A

(type 1)

Star tStart

CPU-B

CPU-A

DIP switch

KB

KB

TST

+UB, 0 V Power supply
J1, J2 Short circuit bridge for teach-in operation
H11/H12...H41/H42 Connection for read heads 1 ... 4
SH1 ...SH4 Shield
TST Test input (see „Self-test with test input TST“ page 17)
O1 ... O4 Semiconductor monitoring outputs
DIA Diagnostics output
13, 14 Relay contact A connection, safety relay enable
23, 24 Relay contact B connection, safety relay enable
Y1, Y2 Feedback loop
S Start button connection (monitoring of the falling edge)

O1 O2 DIA 23

O3 O4

23 24

24 Y2

KA

KA

13

+24 V

14

Y1

CPU-A

Y2

S

CPU-B

8

Operating Instructions Safety System CES-A-UEA-02B/CES-A-UEA-04B

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

9

Operating Instructions Safety System CES-A-UEA-02B/CES-A-UEA-04B

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.

(assured switch-off dis-

ar

or closer

ao

10

Operating Instructions Safety System CES-A-UEA-02B/CES-A-UEA-04B

Electrical Connection

Warning!

In case of an error, loss of the safety function through incorrect connection.

Ì To ensure safety, both safety outputs (13/14 and 23/24) must always be

evaluated.

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 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).

Important!

If the device does not appear to function when operating voltage is applied (e.g.
green STATE LED does not illuminate or flash), the safety switch must be returned
unopened to the manufacturer.

11

Operating Instructions Safety System CES-A-UEA-02B/CES-A-UEA-04B

Safety in case of faults

Ì The operating voltage U

is reverse polarity protected.

B

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.

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

.

12

Operating Instructions Safety System CES-A-UEA-02B/CES-A-UEA-04B

Connection example CES-A-UEA-02B

24 VDC

-F1

0V

-F2

UB

J1 J2

SH1

Trans­ponder

Read­head

H11

1

H12

SH2

Trans­ponder

Read-

head

H21

2

EUCHNER

H22

-K1

L1

L2

L3

13

23

33

14

24

34

GND

CES-A-UEA-02B
097077

TST

Important!

O1

O2

O3

-V1

O4

-K1

DIA

23

A1

A2

-V2

24

13 14

-K2

A1

A2

Y1

Y2

21

22
21

22

S

-K2

-K1

Start

-K2

-M1

13

14

23

24

M

~

3

feedback loop

To achieve category 4 according to EN ISO 13849-1, it is necessary to monitor
the downstream contactors (here contacts of K1 and K2 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.

33

34

13

Operating Instructions Safety System CES-A-UEA-02B/CES-A-UEA-04B

Connection example CES-A-UEA-04B

24 VDC

-F1

-F2

0V

UB

CES-A-UEA-04B
097075

TST

J1 J2 SH1

O1

Trans­ponder

Read­head

H11

O2

1

H12

EUCHNER

SH2

O3

O4

-V1

Trans­ponder

Read-

head

H21

DIA

-K1

2

H22

23

SH3

A1

A2

24

-V2

Trans­ponder

Read-

head

H31

13

-K2

3

H32

14

SH4

A1

A2

Y1

Trans­ponder

Read­head

H41

Y2

H42

21

22
21

22

4

S

-K2

-K1

Start

-K1

-K2

-M1

L1

L2

L3

13

23

33

14

24

34

13

23

33

14

24

34

M

~

3

GND

feedback loop

Important!

To achieve category 4 according to EN ISO 13849-1, it is necessary to monitor
the downstream contactors (here contacts of K1 and K2 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.

14