EUCHNER CET3-AR-CRA-CH-50F-SG-C2357-113958, CET3-AR-CRA-AH-50F-SG-113965, CET3-AR-CDA-CH-50X-SG-114090, CET3-AR-CRA-AH-50F-SG-C2333-114508, CET3-AR-CRA-AH-50X-SG-C2333-114512 Quick Start Manual

Connection of serial wired CES-AR to safety relay PNOZ s4.1

Content

Interlocking device according to EN ISO 14119 .................................................................................................... 2

Components/modules used ................................................................................................................................. 2

EUCHNER ..................................................................................................................................................... 2

Other ............................................................................................................................................................ 2

Functional description ......................................................................................................................................... 3

General ......................................................................................................................................................... 3

Connections .................................................................................................................................................. 3

Safety assessment ............................................................................................................................................. 3

Principle circuit diagram ...................................................................................................................................... 4

AR safety switches connected in series ................................................................................................................ 6

Usage of the Reset input ................................................................................................................................ 6

Teaching in actuators ..................................................................................................................................... 6

Setting of the operating mode selector switch “mode” ........................................................................................... 7

Automatic, manual start – without short circuit detection .................................................................................. 7

Monitored start rising edge – without short circuit detection ............................................................................. 7

Monitored start falling edge – without short circuit detection ............................................................................. 7

Setting of the Reset for PNOZ s4.1 ...................................................................................................................... 8

Manual Reset................................................................................................................................................. 8

Automatic Reset ............................................................................................................................................ 8

Important note – please observe carefully! ............................................................................................................ 9

Subject to technical modifications, no responsibility is accepted for the accuracy of this information. © EUCHNER 2015

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Safety function

Interlocking device according to EN

Reliability figures according to EN ISO 13849

Category 4, PL e

Description

Order no./ item designation

Safety switches with transponder

098582 / CES
098941 / CES
098942 / CES
105745 / CES
105746 / CES
105747 / CES
105748 / CES
105750 / CES
105751 / CES
105752 / CES
105753 / CES
110939 /
110940 /
112711 / CES
112712 / CES
112928 /
112929 /
115792 / CES
115793 / CES

Description

Items

EMERGENCY STOP Safety relay

PNOZ s4.1 / 750 124
PNOZ s4.1 C / 751 124

Interlocking device according to EN ISO 14119

Components/modules used

EUCHNER

technology

ISO 14119

-AR-C01-EH-SA

-AR-C01-AH-SA

-AR-C01-CH-SA

-AR-CR2-CH-SA-105745

-AR-CR2-AH-SA-105746

-AR-CL2-CH-SA-105747

-AR-CL2-AH-SA-105748

-AR-CR2-CH-SG-105750

-AR-CR2-AH-SG-105751

-AR-CL2-CH-SG-105752

-AR-CL2-AH-SG-105753
CES-AR-CR2-CH-SA-110939
CES-AR-CL2-CH-SA-110940

-AR-CR2-CH-SG-112711

-AR-CL2-CH-SG-112712
CES-AR-CR2-CH-SA-112928
CES-AR-CL2-CH-SA-112929

-AR-CR2-CH-SA-115792

-AR-CL2-CH-SA-115793

Tip: More information and downloads about the above mentioned EUCHNER products can be found at www.EUCHNER.de. Simply
enter the order number into the search field.

Other

Subject to technical modifications, no responsibility is accepted for the accuracy of this information. © EUCHNER 2015

AP000144-03_03/15 Page 2 of 9

(V1.0)

(V1.0)

Designation

Function

Use in this examp

OA, OB

Safety outputs.
is closed and the actuator is in operating distance

Switch
switch
the safety relay PNOZ s4.1

Important: The actual shutdown of the energy which is
causing a hazard in a machine is not shown in the example
and must be supplemented

IA, IB Inputs for series connection of AR devices from
EUCHNER.

U3
U2 and U1

OUT Monitoring output. HIGH when outputs OA and OB
are switched on (safety guard closed and locked).

Function is not used

RST Input for resetting the switch

Activated via switch S5. All CES connected in series must be
reset simultaneously. Refer to the
switches connected in series”.

Functional description

General

The CES-AR is part of an interlocking device in accordance with EN ISO 14119. In this example 3 CES-AR are connected in series.
The two safe outputs of the last CES-AR are connected to a PNOZ s4.1 safety relay.

Connections

HIGH when the safeguarding device

-off of at least one of the outputs leads to a direct

.

-off of the safety contacts (13 – 14, 23 – 24, …) of

: connected to 24V DC.

: connected to OA and OB of the previous device.

le

.

.

.

section “AR safety

Safety assessment

The CES features complete monitoring for faults in the safety-relevant parts and in the connected cables (clock pulses at outputs
OA and OB). The safety relay PNOZ s4.1 achieve up to PL e according to the manufacturer’s information (see the device’s
operating instructions for this purpose). The wiring corresponds to the circuit “light barrier or safety switch with detection of shorts
across contacts via ESPE” in the operating instructions of the PNOZ s4.1. Therefore, PL e in accordance with EN ISO 13849-1 can
be achieved for position monitoring of a safety guard and for interlocking (preventing the operation of a machine element under
certain conditions). Series connection of three CES devices does not reduce the achievable PL.

Important: Switch-off of the energy and any necessary monitoring energy switch-off (feedback loop) of the hazard are not part of
this document and must be added in accordance with the risk assessment for the machine. In this example, the safety evaluation
unit without feedback loop and without start button is used. Please refer to the operating instructions of the safety evaluation unit
for more information.

Subject to technical modifications, no responsibility is accepted for the accuracy of this information. © EUCHNER 2015

AP000144-03_03/15 Page 3 of 9

Principle circuit diagram

In the example Automatic Reset of the PNOZ s4.1 is used

Figure 1

Subject to technical modifications, no responsibility is accepted for the accuracy of this information. © EUCHNER 2015

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Figure 2

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AR safety switches connected in series

Usage of the Reset input

In a series connection the reset must always be connected to all switches. A common signal must be used for all switches in the
chain. This can be a changeover switch or the output of a control system. A button is not suitable because Reset must always be
connected to GND during operation.

The reset is used to synchronize the switches connected in series. This action is necessary if synchronization is lost due to
external effects. This situation may be caused by switching off one of the switches in the series. All switches in the chain must
always be reset together, as otherwise the synchronization will fail and as a result the safety outputs will not switch.

Teaching in actuators

It is recommended not to teach-in the actuators in the series circuit, but to teach them in one by one instead.
It is often only possible to teach-in actuators in an installed chain with limitations. Work on the wiring (e.g. during device
replacement) should in general be performed in a de-energized state. On certain systems, it is nevertheless necessary to perform
this work and subsequent teach-in during ongoing operation.
To make this action possible, the input RST must be connected as shown in Figures 1 and 2.
Proceed as follows:

1. Open the safety door on which the switch or actuator is to be replaced.

2. Mount the new switch or actuator and close all safety doors in the chain.

3. Actuate the reset for at least 3 s (24 V on RST).

4. On the safety switch that is positioned at a new actuator, the green LED flashes at approx. 1 Hz and the actuator is

taught-in. This happens for approx. 1 minute - do not switch off during this time and do not actuate reset!
The teach-in operation has ended when the LED on the device is off.

5. Actuate the reset for at least 3 s (24 V on RST).

The system re-starts and then operates normally again.

Subject to technical modifications, no responsibility is accepted for the accuracy of this information. © EUCHNER 2015

AP000144-03_03/15 Page 6 of 9

Operating mode selector
switch “mode”

Automatic, manual start

Without short circuit detection

Operating mode selector
switch “mode”

Monitored start, rising edge

Without short circuit detection

Operating mode selector
switch “mode”

Monitored start falling edge

Without short circuit detection

Setting of the operating mode selector switch “mode”

Only with the following settings does the safety relay PNOZ s4.1 operate correctly with a CES-AR.

Automatic, manual start – without short circuit detection

ATTENTION: For an automatic start push-button S2 has to be replaced by a bridge.

Monitored start rising edge – without short circuit detection

Monitored start falling edge – without short circuit detection

Subject to technical modifications, no responsibility is accepted for the accuracy of this information. © EUCHNER 2015

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Setting of the Reset for PNOZ s4.1

Only with the following settings does the safety relay PNOZ s4.1 operate correctly with a CES-AR.

Manual Reset

Automatic Reset

Subject to technical modifications, no responsibility is accepted for the accuracy of this information. © EUCHNER 2015

AP000144-03_03/15 Page 8 of 9

EUCHNER GmbH + Co. KG · Kohlhammerstraße 16 · 70771 Leinfelden-Echterdingen

Important note – please observe carefully!

This document is intended for a design engineer who possesses the requisite knowledge in safety engineering and knows the
applicable standards, e.g. through training for qualification as a safety engineer. Only with the appropriate qualification is it possible
to integrate the introduced example into a complete safety chain.

The example represents only a part of a complete safety chain and does not fulfill any safety function on its own. In order to fulfill a
safety function, the energy switch-off function for the hazard location and the software within the safety evaluation must also be
considered, for example.

The introduced applications are only examples for solving certain safety tasks for protecting safety guards. The examples cannot
be comprehensive due to the application-dependent and individual protection goals within a machine/installation.

If questions pertaining to this example remain open, please contact us directly.

In accordance with Machinery Directive 2006/42/EC, the design engineer of a machine or installation is obligated to perform a risk
assessment and take measures to reduce the risk. When doing this, the engineer must comply with the applicable national and
international standards. Standards generally represent the current state of the art. Therefore, the design engineer should
continuously inform himself about changes in the standards and adapt his considerations to them. Relevant standards include EN
ISO 13849 and EN 62061. This application must be regarded only as assistance for the considerations about safety measures.

The design engineer of a machine/installation is obligated to assess the safety technology himself. The examples must not be used
for assessment, because only a small excerpt of a complete safety function was considered in terms of safety engineering here.

In order to be able to use the safety switch applications correctly on safety guards, it is indispensable to observe the standards EN
ISO 13849-1, EN ISO 14119 and all relevant C-standards for the respective machine type. Under no circumstances does this
document replace the engineer’s own risk assessment, and it cannot serve as the basis for a fault assessment.

Particularly in case of a fault exclusion, it must be noted that this can be performed only by the design engineer of a machine or
installation and requires a reason. A general fault exclusion is not possible. More information about fault exclusion can be found in
EN ISO 13849-2.

Changes at products or within assemblies from third-party suppliers used in this example can lead to the function no longer being
ensured or the safety assessment having to be adapted. In any event, the information in the operating instructions on the part of
EUCHNER, as well as on the part of third-party suppliers, must be taken as the basis before this application is integrated into an
overall safety function. If contradictions should arise between the operating instructions and this document, please contact us
directly.

Use of brand and company names

All mentioned brand and company names are property of the respective manufacturers. The use is only for clear identification of
compatible peripheral devices and environment of operation in combination with our products.

Telefon: [phone] · Telefax: [phone] · [e-mail] · www.euchner.de

Subject to technical modifications, no responsibility is accepted for the accuracy of this information. © EUCHNER 2015

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