Pilz PNOZ X2C User manual

PNOZ X2C
Operating Manual-19918-EN-10
-Safety relays

Preface
This document is the original document.
Where unavoidable, for reasons of readability, the masculine form has been selected when
formulating this document. We do assure you that all persons are regarded without discrim-
ination and on an equal basis.
All rights to this documentation are reserved by Pilz GmbH & Co. KG. Copies may be made
for the user's internal purposes. Suggestions and comments for improving this documenta-
tion will be gratefully received.
Pilz®, PIT®, PMI®, PNOZ®, Primo®, PSEN®, PSS®, PVIS®, SafetyBUS p®,
SafetyEYE®, SafetyNET p®, the spirit of safety® are registered and protected trademarks
of Pilz GmbH & Co. KG in some countries.
SD means Secure Digital

Contents
Operating Manual PNOZ X2C
19918-EN-10 | 3
Introduction ............................................................................................................................4
Validity of documentation ..........................................................................................................4
Using the documentation ..........................................................................................................4
Definition of symbols .................................................................................................................4
Safety ......................................................................................................................................5
Intended use .............................................................................................................................5
Safety regulations .....................................................................................................................5
Safety assessment....................................................................................................................5
Use of qualified personnel.........................................................................................................6
Warranty and liability.................................................................................................................6
Disposal ....................................................................................................................................6
For your safety ..........................................................................................................................6
Unit features ...........................................................................................................................7
Safety features .......................................................................................................................7
Block diagram/terminal configuration .................................................................................7
Function Description .............................................................................................................8
Operating modes.......................................................................................................................8
Timing diagram .........................................................................................................................8
Installation ..............................................................................................................................9
Wiring ......................................................................................................................................9
Preparing for operation .........................................................................................................10
Operation ................................................................................................................................11
Status indicators........................................................................................................................12
Faults – Interference ..............................................................................................................12
Dimensions in mm .................................................................................................................12
Technical details ....................................................................................................................13
Safety characteristic data..........................................................................................................16
Supplementary data ...............................................................................................................16
Service life graph ......................................................................................................................17
Order reference ......................................................................................................................17
EC declaration of conformity ................................................................................................17
UKCA-Declaration of Conformity .........................................................................................18

PNOZ X2C
Operating Manual PNOZ X2C
19918-EN-10 | 4
Introduction
Validity of documentation
This documentation is valid for the product PNOZ X2C. It is valid until new documentation
is published.
This operating manual explains the function and operation, describes the installation and
provides guidelines on how to connect the product.
Using the documentation
This document is intended for instruction. Only install and commission the product if you
have read and understood this document. The document should be retained for future ref-
erence.
Definition of symbols
Information that is particularly important is identified as follows:
DANGER!
This warning must be heeded! It warns of a hazardous situation that poses
an immediate threat of serious injury and death and indicates preventive
measures that can be taken.
WARNING!
This warning must be heeded! It warns of a hazardous situation that could
lead to serious injury and death and indicates preventive measures that can
be taken.
CAUTION!
This refers to a hazard that can lead to a less serious or minor injury plus
material damage, and also provides information on preventive measures
that can be taken.
NOTICE
This describes a situation in which the product or devices could be dam-
aged and also provides information on preventive measures that can be
taken. It also highlights areas within the text that are of particular import-
ance.

PNOZ X2C
Operating Manual PNOZ X2C
19918-EN-10 | 5
INFORMATION
This gives advice on applications and provides information on special fea-
tures.
Safety
Intended use
The safety relay PNOZ X2C provides a safety-related interruption of a safety circuit.
The safety relay meets the requirements of EN 60947-5-1 and EN 60204-1 and may be
used in applications with:
}E-STOP pushbuttons
}Safety gates
Improper use
The following is deemed improper use in particular
}Any component, technical or electrical modification to the product,
}Use of the product outside the areas described in this operating manual,
}Use of the product outside the technical details (see Technical details [ 13]).
NOTICE
EMC-compliant electrical installation
The product is designed for use in an industrial environment. The product
may cause interference if installed in other environments. If installed in other
environments, measures should be taken to comply with the applicable
standards and directives for the respective installation site with regard to in-
terference.
Safety regulations
Safety assessment
Before using a device, a safety assessment in accordance with the Machinery Directive is
required.
The product as an individual component fulfils the functional safety requirements in accord-
ance with EN ISO 13849 and EN 62061. However, this does not guarantee the functional
safety of the overall plant/machine. To achieve the relevant safety level of the overall plant/
machine’s required safety functions, each safety function needs to be considered separ-
ately.

PNOZ X2C
Operating Manual PNOZ X2C
19918-EN-10 | 6
Use of qualified personnel
The products may only be assembled, installed, programmed, commissioned, operated,
maintained and decommissioned by persons who are competent to do so.
A competent person is a qualified and knowledgeable person who, because of their train-
ing, experience and current professional activity, has the specialist knowledge required. To
be able to inspect, assess and operate devices, systems and machines, the person has to
be informed of the state of the art and the applicable national, European and international
laws, directives and standards.
It is the company’s responsibility only to employ personnel who
}Are familiar with the basic regulations concerning health and safety / accident prevention,
}Have read and understood the information provided in the section entitled Safety
}Have a good knowledge of the generic and specialist standards applicable to the specific
application.
Warranty and liability
All claims to warranty and liability will be rendered invalid if
}The product was used contrary to the purpose for which it is intended,
}Damage can be attributed to not having followed the guidelines in the manual,
}Operating personnel are not suitably qualified,
}Any type of modification has been made (e.g. exchanging components on the PCB
boards, soldering work etc.).
Disposal
}In safety-related applications, please comply with the mission time TM in the safety-related
characteristic data.
}When decommissioning, please comply with local regulations regarding the disposal of
electronic devices (e.g. Electrical and Electronic Equipment Act).
For your safety
The unit meets all the necessary conditions for safe operation. However, please note the
following:
}Note for overvoltage category III: If voltages higher than low voltage (>50 VAC or >120
VDC) are present on the unit, connected control elements and sensors must have a rated
insulation voltage of at least 250 V.

PNOZ X2C
Operating Manual PNOZ X2C
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Unit features
}Positive-guided relay outputs:
– 2 safety contacts (N/O), instantaneous
}Connection options for:
– E-STOP pushbutton
– Safety gate limit switch
– Start button
}LED display for:
– Supply voltage
– Switch status of the safety contacts
Safety features
The safety relay meets the following safety requirements:
}The circuit is redundant with built-in self-monitoring.
}The safety function remains effective in the case of a component failure.
}The correct opening and closing of the safety function relays is tested automatically in
each on-off cycle.
Block diagram/terminal configuration
PNOZ X2C
A1
14
S33 S34
S12
13 23 24
POWER
CH. 1
CH. 2
14 24
13 23
A2 S22S21
S11
*Insulation between the non-marked area and the relay contacts: Basic insulation (over-
voltage category III), Protective separation (overvoltage category II)

PNOZ X2C
Operating Manual PNOZ X2C
19918-EN-10 | 8
Function Description
The safety relay PNOZ X2C provides a safety-oriented interruption of a safety circuit. When
supply voltage is supplied the "POWER" LED is lit. The unit is ready for operation when the
start circuit S33-S34 is closed.
}Input circuit is closed (e.g. E-STOP pushbutton not operated):
– Safety contacts 13-14 and 23-24 are closed, the unit is active.
– The LEDs "CH.1" and "CH.2" are lit.
}Input circuit is opened (e.g. E-STOP pushbutton operated):
– Safety contacts 13-14 and 23-24 are redundantly opened.
– The LEDs "CH.1" and "CH.2" go out.
Operating modes
}Single-channel operation: No redundancy in the input circuit, the PNOZ X2C detects
– earth faults in the input circuit,
– earth faults and short circuits in the start circuit.
}Dual-channel operation with detection of shorts across contacts: Redundant input circuit,
detects PNOZ X2C
– earth faults in the start and input circuit,
– short circuits in the start and input circuit,
– shorts across contacts in the input circuit.
}Monitored start: Unit is active once the input circuit is closed and once the start circuit is
closed after the waiting period has elapsed (see Technical details [ 13]).
}Increase in the number of available contacts by connecting contact expandsion modules
or external contactors/relays.
Timing diagram
Legend
}Power: Supply voltage
}Start: Start circuit
}Input: Input circuit
}Output safe: Safety contacts
}t1: Switch-on delay
}t2: Delay-on de-energisation
}t3: Waiting period with a monitored start

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Operating Manual PNOZ X2C
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Installation
}The unit should be installed in a control cabinet with a protection type of at least IP54.
}Use the notch on the rear of the unit to attach it to a DIN rail (35 mm).
}When installed vertically: Secure the unit by using a fixing element (e.g. retaining bracket
or end angle).
Wiring
Please note:
}Information given in the "Technical details [ 13]" must be followed.
}The outputs 13-14, 23-24 are safety contacts.
}To prevent contact welding, a fuse should be connected before the output contacts (see
Technical details [ 13]).
}Calculation of the max. cable length lmax in the input circuit:
Rlmax
Rl / km
Imax =
Rlmax = max. overall cable resistance (see Technical details [ 13])
Rl/km = cable resistance/km
}Use copper wiring with a temperature stability of 60/75 °C.
}To prevent EMC interferences (particularly common-mode interferences) the measures
described in EN60204-1 must be executed. This includes the separate routing of cables
of the control circuits (input, start and feedback loop) from other cables for energy trans-
mission or the shielding of cables, for example.
}Adequate protection must be provided on all output contacts with capacitive and inductive
loads.
}Do not switch low currents using contacts that have been used previously with high cur-
rents.
}When connecting magnetically operated, reed proximity switches, ensure that the max.
peak inrush current (on the input circuit) does not overload the proximity switch.
}The power supply must comply with the regulations for extra low voltages with protective
electrical separation (SELV, PELV) in accordance with VDE 0100, Part 410.
Important for detection of shorts across contacts:
As this function for detecting shorts across contacts is not failsafe, it is tested by Pilz during
the final control check. If there is a danger of exceeding the cable runs, we recommend the
following test after the installation of the device:
1. Unit ready for operation (output contacts closed)
2. Short circuit the test terminals S12, S22 for detecting shorts across the inputs.
3. The unit's fuse must be triggered and the output contacts must open. Cable lengths in
the scale of the maximum length can delay the fuse triggering for up to 2 minutes.
4. Reset the fuse: remove the short circuit and switch off the supply voltage for approx. 1
minute.

PNOZ X2C
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Preparing for operation
Supply voltage AC DC
A1
A2
L1
N
A1
A2
L+
L-
Input circuit Single-channel Dual-channel (with detection of
shorts across contacts)
E-STOP
S1
S22
S21
S12
S11
L+A1
S1
S22
S21
S12
S11
Safety gate
S1
S22
S21
S12
S11
L+A1
S1 S2
S12
S11
S22
S21
NOTICE
With single-channel wiring the safety level of your machine/plant may be
lower than the safety level of the unit (see Safety characteristic
data [ 16]).
Start circuit Single-channel Dual-channel (with detection of
shorts across contacts)
Monitored start
S33
S34
S3
S33
S34
S3