Pilz PZW Series User manual

PZW
Operating Manual-19157-EN-07
}Safe monitoring relays

Preface
This document is the original document.
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.
Source code from third-party manufacturers or open source software has been used for
some components. The relevant licence information is available on the Internet on the Pilz
homepage.
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 PZW
19157-EN-07 3
Introduction 4
Validity of documentation 4
Using the documentation 4
Definition of symbols 4
Safety 5
Intended use 5
Safety regulations 6
Safety assessment 6
Use of qualified personnel 6
Warranty and liability 6
Disposal 6
For your safety 7
Unit features 7
Safety features 7
Block diagram/terminal configuration 8
Types: AC 8
Types: DC 8
Function description 9
Installation 10
Wiring 10
Preparing for Operation 11
Connection 11
Application example 11
Operation 12
Status indicators 12
Faults – Interference 12
Dimensions in mm 13
Technical details 13
Safety characteristic data 21
Supplementary data 22
Service life graph 22
Order reference 22
EC declaration of conformity 23

PZW
Operating Manual PZW
19157-EN-07 4
Introduction
Validity of documentation
This documentation is valid for the product PZW. It is valid until new documentation is pub-
lished.
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.

PZW
Operating Manual PZW
19157-EN-07 5
INFORMATION
This gives advice on applications and provides information on special fea-
tures.
Safety
Intended use
The unit operates as a pulse relay
}in accordance with EN ISO 12100:2010 section 6.2.11.10, 6.3.2.4 and 3.28.9 (inching
circuit for limited movement of hazardous machine components during installation, set
up and positioning)
}in safety circuits in accordance with VDE 0113-1 and IEC 60204-1
The unit is designed for use with
}Safety relays from the PNOZ series
}Two-hand relays from the P2HZ series
The category that can be achieved in accordance with EN ISO13849-1 depends on the
category of the base unit. PZW may not exceed this.
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 manual,
}Use of the product outside the technical details (see Technical details).
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.

PZW
Operating Manual PZW
19157-EN-07 6
Safety regulations
Safety assessment
Before using a device it is necessary to perform a safety assessment in accordance with
the Machinery Directive.
Functional safety is guaranteed for the product as a single component. However, this does
not guarantee the functional safety of the overall plant/machine. In order to achieve the re-
quired safety level for the overall plant/machine, define the safety requirements for the
plant/machine and then define how these must be implemented from a technical and organ-
isational standpoint.
Use of qualified personnel
The products may only be assembled, installed, programmed, commissioned, operated,
maintained and decommissioned by competent persons.
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 preven-
tion,
}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 spe-
cific 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-re-
lated characteristic data.
}When decommissioning, please comply with local regulations regarding the disposal of
electronic devices (e.g. Electrical and Electronic Equipment Act).

PZW
Operating Manual PZW
19157-EN-07 7
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.
Unit features
}Positive-guided relay outputs:
– 1 safety contact (N/O), pulsing
– 2 auxiliary contacts (N/C), pulsing
}LED display for:
– Supply voltage
– Switch state safety output
}12 pulse times, set via rotary switch
}Feedback loop for monitoring external contactors
}See order reference for unit types
Safety features
The relay meets the following safety requirements:
}The circuit is internally redundant with built-in self-monitoring.
}The safety device remains effective in the case of a component failure.
}The correct opening and closing of the safety device relays is tested automatically in
each on-off cycle.

PZW
Operating Manual PZW
19157-EN-07 8
Block diagram/terminal configuration
Types: AC
}UB: 110 - 120 VAC; Order no. 774015, 774044
}UB: 230 V AC; Order no. 774017, 774048
*Insulation between the non-marked area and the relay contacts: Basic insulation (over-
voltage category III), Protective separation (overvoltage category II)
Types: DC
}UB: 24 VDC; Order no. 774019, 774042
*Insulation between the non-marked area and the relay contacts: Basic insulation (over-
voltage category III), Protective separation (overvoltage category II)

PZW
Operating Manual PZW
19157-EN-07 9
Function description
The unit is ready for operation when the feedback loop Y1-Y2 is closed.
}Input circuit closed (supply voltage is present)
"POWER" LED is illuminated. The safety contact 17-18 will be closed immediately and
the auxiliary contacts 25-26, 35-36 will open, time sequence starts. The "OUT" LED is
lit. The safety contact 17-18 is opened redundantly and the auxiliary contacts 25-26,
35-36 will close once the set pulse time has elapsed. The "OUT" LED is goes out.
The input circuit must be closed for at least as long as the set delay time tv (pulse time).
When the input or feedback loop is interrupted prematurely, the time sequence is cancelled.
The safety contact 17-18 will open and the auxiliary contacts 25-26, 35-36 will close. The
LEDs "POWER" and "OUT" go out.
The delay time tv (pulse time) can be set in 12 stages.
[1] [2] [3] [4]
Legend
}Input: Input circuit
}Feedback: Feedback loop
}Output safe: Safety contact
}Output aux: Auxiliary contacts
}tv: Delay time (pulse time)
[1]: Normal operating cycle
[2]: Fault: Input circuit opened too early
[3]: Fault: Feedback loop closed too late within tv
[4]: Fault: Feedback loop closed too late after tv elapsed
NOTICE
At the latest the safety contacts open after the set delay time + 50 ms +
15% of the set value, even in the case of a component failure.

PZW
Operating Manual PZW
19157-EN-07 10
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" must be followed.
}The output 17-18 is a safety contact, outputs 25-26, 35-36 are auxiliary contacts (e.g.
for display).
}Do not use auxiliary contacts 25-26, 35-36 for safety circuits!
}To prevent contact welding, a fuse should be connected before the output contacts (see
Technical details).
}Do not connect undesignated terminals.
}Calculation of the max. cable length lmax in the input circuit:
Rlmax
Rl / km
Imax =
Rlmax = max. overall cable resistance (see Technical details)
Rl/km = cable resistance/km
}Use copper wire that can withstand 60/75°C.
}Sufficient fuse protection must be provided on all output contacts with capacitive and in-
ductive loads.
}Do not switch low currents using contacts that have been used previously with high cur-
rents.
}Ensure the wiring and EMC requirements of EN 60204-1 are met.
}On 24 VDC devices:
The power supply must comply with the regulations for extra low voltages with protect-
ive electrical separation (SELV, PELV) in accordance with VDE 0100, Part 410.
}In devices for 24 V DC shorts between the input circuit and feedback loop or earth
faults in the feedback loop can damage the unit. We recommend the use of a short cir-
cuit-proof supply voltage with current limitation.