Pilz PSWZ X1P User manual

PSWZ X1P
Operating Manual-21005-EN-11
}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 PSWZ X1P
21005-EN-11 | 3
Introduction ............................................................................................................................5
Validity of documentation.......................................................................................................... 5
Using the documentation .......................................................................................................... 5
Definition of symbols................................................................................................................. 5
Safety ...................................................................................................................................... 6
Intended use ............................................................................................................................. 6
Safety regulations ..................................................................................................................... 6
Safety assessment ................................................................................................................... 6
Use of qualified personnel ........................................................................................................ 7
Warranty and liability ................................................................................................................ 7
Disposal .................................................................................................................................... 7
For your safety.......................................................................................................................... 7
Unit features ...........................................................................................................................8
Safety features ....................................................................................................................... 8
Block diagram/terminal configuration ................................................................................. 9
Function description ............................................................................................................. 9
Operating modes ...................................................................................................................... 10
Timing diagram ......................................................................................................................... 11
Installation ..............................................................................................................................11
Wiring ......................................................................................................................................11
Preparing for operation ......................................................................................................... 13
Connection................................................................................................................................ 13
Set standstill detection.............................................................................................................. 14
Application example.................................................................................................................. 15
Operation ................................................................................................................................16
Status indicators ....................................................................................................................... 16
Fault indicators ......................................................................................................................... 17
Faults – Interference .............................................................................................................. 17
Dimensions in mm .................................................................................................................17
Technical details ....................................................................................................................18
Safety characteristic data ......................................................................................................... 31
Supplementary data ..............................................................................................................32
Service life graph ...................................................................................................................... 32

Contents
Operating Manual PSWZ X1P
21005-EN-11 | 4
Order reference ......................................................................................................................34
EC declaration of conformity ................................................................................................ 34

PSWZ X1P
Operating Manual PSWZ X1P
21005-EN-11 | 5
Introduction
Validity of documentation
This documentation is valid for the product PSWZ X1P. 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.

PSWZ X1P
Operating Manual PSWZ X1P
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INFORMATION
This gives advice on applications and provides information on special fea-
tures.
Safety
Intended use
The PSWZ X1P is used for safe standstill monitoring.
The unit is designed for use with
}Standstill monitoring at plants with dangerous machine parts or tools in safety circuits in
accordance with VDE 0113-1 and EN 60204-1
Standstill is only detected on power-free measuring circuits. Residual voltages, induced
voltages or drives within the position control will prevent safe standstill detection!
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 [ 18]).
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 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.

PSWZ X1P
Operating Manual PSWZ X1P
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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 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.

PSWZ X1P
Operating Manual PSWZ X1P
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Unit features
}Measuring inputs for 3- or 1-phase motors
}Measuring voltage on both channels can be set jointly
}1 Reset input
}Positive-guided relay outputs:
– 2 safety contacts (N/O), instantaneous
– 1 auxiliary contact (N/C), instantaneous
}2 semiconductor outputs
}LED display for:
– Standstill on channel 1/2
– Supply voltage/fault
}Semiconductor outputs signal:
– Supply voltage/fault
– Switch status
}Feedback loop for monitoring external contactors
}Plug-in connection terminals (either spring-loaded terminal or screw terminal)
}See order reference for unit types
Safety features
}The relay meets the following safety requirements:
– The circuit is 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.
}The unit monitors the measuring circuits for open circuit. If an open circuit occurs
between the unit and the motor or on the motor itself, the unit immediately switches off.
}The standstill monitor prevents the plant from being enabled in the following cases:
– Power supply failure
– Component failure
– Measuring circuits are open circuit
– Coil defect/open circuit

PSWZ X1P
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Block diagram/terminal configuration
**Insulation against the non-marked area and between the relay contacts: Basic insulation
(overvoltage category III), protective separation (overvoltage category II); at 250 V, 4 kV
***Insulation against the non-marked area and between the measurement connections: Ba-
sic insulation (overvoltage category III), protective separation (overvoltage category II); at
690 V, 6 kV
}Channel 1: L1-L3
}Channel 2: L2-L3
Function description
The device uses two separate measuring channels to measure the regenerated voltage, in-
duced from the motor during the rundown period. If the voltage falls below the set response
value (standstill threshold), the PSWZ X1P enables the monitored plant.
When used with frequency converters, the PSWZ X1P cannot detect standstill until the con-
troller inhibit has been switched off.
After the supply voltage UB is switched on, the unit performs a self test. The unit simulates a
situation in which the release value is exceeded and the measuring circuit has an open cir-
cuit. The correct function of the output relay and feedback loop is also tested. The test
takes approx. 1.5 s.
The unit is ready for operation when the feedback loop is closed and the measuring circuits
are not interrupted.
}Procedure when the measuring voltage falls below the response value Uon on both chan-
nels L1-L3 and L2-L3:
– LEDs "POWER", "CH.1 IN", "CH.2 IN" and "OUTPUT" are lit.
– Safety contacts 13-14 and 23-24 are closed, auxiliary contact 41-42 is open.
– A high signal is present at semiconductor output Y32.
}Procedure when after the motor has started, the voltage in one of the two measuring cir-
cuits exceeds the release value Uoff:
– Safety contacts 13-14 and 23-24 are opened redundantly, auxiliary contact 41-42 is
closed.

PSWZ X1P
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– A low signal is present at semiconductor output Y32.
– LEDs "CH.1 IN", "CH.2 IN" and "OUTPUT" go out.
To reactivate, the voltage at both channels L1-L3 and L2-L3 must fall below the response
value Uon within the time tg (simultaneity monitoring) and the feedback loop must be closed.
The response value Uon can be set jointly for both channels in order to suit the motor that is
to be monitored. The release value Uoff (hysteresis) corresponds to twice the response
value.
If the simultaneity requirement is exceeded, the "FAULT" LED is lit and on the semicon-
ductor output Y35 there is a High signal. The PSWZ X1P does not enable the monitored
plant. The fault is reset by applying a High signal and then a Low signal at the reset input.
Self test
An internal self test is carried out during initial commissioning and each time the supply
voltage is switched off and on. The process simulates switching all measuring voltages on
and then off again. Provided no error occurs during the self test, the unit will then be ready
for operation.
Operating modes
}Single-phase operation:
– One measuring circuit (calculated at two different measuring points) affects both
channels
}Three-phase operation:
– Two redundant (identical) measuring circuits affect channel 1 and 2
– Voltages in the measuring circuit are monitored (failsafe in the event of a short circuit)

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Timing diagram
Output
Feedback loop
Legend
}POWER: Supply voltage
}UL1/UL2: Input circuit L1, L2, L3
}Feedback loop: Feedback loop Y1-Y2
}Output safe: Safety contacts 13-14, 23-24
}Output aux: Auxiliary contact 41-42
}Output Y35: Semiconductor output for fault signal
}RESET: Reset input
}Uon: Response value
}Uoff: Release value
}tg: Simultaneity
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 [ 18]" must be followed.
}Outputs 13-14, 23-24 are safety contacts, the output 41-42 is an auxiliary contact (e.g. for
display).
}Auxiliary contact 41-42 shouldnot be used for safety circuits!
}To prevent contact welding, a fuse should be connected before the output contacts (see
Technical details [ 18]).

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}Calculation of the max. cable length lmax in the input circuit:
Rlmax
Rl / km
Imax =
Rlmax = max. overall cable resistance (see Technical details [ 18])
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.
}When used with converters: Please comply with the information regarding installation and
wiring in the documentation of the converter. Use screened cable for the wiring between
the PSWZ X1P and the motor. Connect the cable screening on the motor.
}Protect the measuring circuits according to the conductor cross section.
}Single-phase motor: Connect terminal L1 directly to motor connection terminal L, and ter-
minal L3 directly to motor connection terminal N. Connect terminal L2 directly to the ele-
ment that switches the motor on (contactor, converter, etc.). Separate cables with separ-
ate insulation should be used for the measuring voltages L1 and L2. The cables should
also be physically separate.
}Three-phase motor: Connect the connection terminals L1, L2 and L3 directly to the motor
connection terminals L1, L2 and L3.
}Do not connect the terminals labelled "*".

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Preparing for operation
Connection
Supply voltage AC DC
A1
A2
L1
N
A1
A2
L+
L-
Input circuit Single-phase motor Three-phase motor
Single-phase motor = single-
phase measurement signal eval-
uation
Three-phase motor = two-phase
measurement signal evaluation
F2
PSWZ X1P
F2
PSWZ X1P
Single-phase measurement sig-
nal evaluation
F2
PSWZ X1P
Feedback loop with feedback loop monitoring without feedback loop monitor-
ing
Contacts from external contactors
or link
Semiconductor output
Y32: Semiconductor output for
switch status
Y35: Semiconductor output for
fault signal
Semiconductor input

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Set standstill detection
}Turn the potentiometer to the left-hand stop (default setting)
}Set standstill detection
– At motor standstill, the LEDs "CH.1 IN" and "CH.2 IN" must light up. If the LEDs do
not light in the default setting, turn the potentiometer gradually to the right until the
LEDs "CH.1 IN" and "CH.2 IN” light up.
– If the simultaneity requirement is met, the "OUTPUT” LED will also light up. Safety
contacts 13-14 and 23-24 are closed, auxiliary contact 41-42 is open, there is a High
signal at the semiconductor output Y32.
– If the simultaneity requirement is exceeded, the "FAULT" LED will light up. Safety
contacts 13-14 and 23-24 are open, auxiliary contact 41-42 is closed, a low signal is
present at semiconductor output Y32. Reset the error by a pulse (High- Low- signal)
at the reset input.
}Test standstill detection
– Close the feedback loop, start up the motor and then switch it off again. As soon as
the motor is at standstill, the LEDs "CH.1 IN", "CH.2 IN" and "OUTPUT" light up.
Safety contacts 13-14 and 23-24 are closed, auxiliary contact 41-42 is open, there is
a High signal at the semiconductor output Y32.
INFORMATION
We recommend that after setting the standstill detection, you seal the po-
tentiometer with the label supplied.

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Application example
N
L3
PSWZ X1P
L2
L1
PNOZ X3P
S31A1
S11 S12 S13 S14 S21 S22 S33 S34
A2 Y30 Y31 Y32 14 24 34 42
S32 13 23 33 41
Standstill detection only with closed star contactor contacts
Legend
}S0: Off switch
}S1: On switch
}S2/S4: Safety gate switch
}S3: Release
}S5: Reset button
}K1: Star/delta control relay
}K2: Motor contactor
}K3: Delta contactor
}K4: Star contactor
}H: Fault indicator
}: Operated element
}: Gate open
}: Gate closed

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Operation
When the relay outputs are switched on, the mechanical contact on the relay cannot be
tested automatically. Depending on the operational environment, measures to detect the
non-opening of switching elements may be required under some circumstances.
When the product is used in accordance with the European Machinery Directive, a check
must be carried out to ensure that the safety contacts on the relay outputs open correctly.
Open the safety contacts (switch off output) and start the device again, so that the internal
diagnostics can check that the safety contacts open correctly
}for SIL CL 3/PL e at least 1x per month
}for SIL CL 2/PL d at least 1x per year
NOTICE
The safety function should be checked after initial commissioning and each
time the plant/machine is changed. The safety functions may only be
checked by qualified personnel.
NOTICE
When operated with increased safety (e.g. safe standstill monitoring), the
following test must be performed at least once a week:
– Start up the motor. All LEDs except "POWER” must go out. Safety
contacts 13-14 and 23-24 must be open and auxiliary contact 41-42
must be closed.
– Switch the motor off again. The LEDs "CH.1 IN", "CH.2 IN" and
"OUTPUT” should not light up / safety contacts 13-14 and 23-24
should not be closed and the auxiliary contact 41-42 open until the
motor shaft has come to a standstill.
LEDs indicate the status and errors during operation:
LED on
Status indicators
POWER
Supply voltage is present.
CH.1 IN
Channel 1 safety contacts are closed.
CH.2 IN
Channel 2 safety contacts are closed.
OUTPUT
Safety contacts are closed and semiconductor output Y32 carries a high signal.

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Fault indicators
FAULT
Diagnostics: Simultaneity requirement is exceeded or single-channel exceeding
and subsequent value falls again below the standstill threshold UOff
}Remedy: Reset the error by supplying a High signal and then a Low signal at
the Reset input.
Faults – Interference
}LED "POWER" does not light: Short circuit or no supply voltage.
}Contact malfunctions: If the contacts have welded, reactivation will not be possible after
the input circuit has opened.
}When exceeding the simultaneity time the safety contacts 13-14, 23-24 remain open.
Dimensions in mm
* with spring-loaded terminals

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Operating Manual PSWZ X1P
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Technical details
Order no. 777949 – 777950
See below for more order numbers
General 777949 777950
Certifications
CCC, CE, EAC (Eurasian), TÜV,
cULus Listed
CCC, CE, EAC (Eurasian), TÜV,
cULus Listed
Electrical data 777949 777950
Supply voltage
Voltage 24 - 240 V 24 - 240 V
Kind AC/DC AC/DC
Voltage tolerance -15 %/+10 % -15 %/+10 %
Output of external power supply
(AC) 5 VA 5 VA
Output of external power supply
(DC) 3 W 3 W
Frequency range AC 50 - 60 Hz 50 - 60 Hz
Residual ripple DC 160 % 160 %
Max. inrush current at UB 10 A 10 A
Duty cycle 100 % 100 %
Measuring circuit 777949 777950
Min. measuring voltage 0,0 V 0,0 V
Max. measuring voltage 690 V 690 V
Measuring voltage in accordance
with UL 600 V 600 V
Frequency range 0 - 3 kHz 0 - 3 kHz
Input resistance 1.300 kOhm 1.300 kOhm
Switching threshold per channel
Response value Uon (ad-
justable) 20 - 500 mV 120 - 3000 mV
Release value Uoff 2 x Uon 2 x Uon
Inputs 777949 777950
Voltage at
Feedback loop DC 24 V 24 V
Current at
Feedback loop DC 35 mA 35 mA
Max. inrush current impulse
Current pulse, feedback loop 0,12 A 0,12 A
Pulse duration, feedback loop 0,1 s 0,1 s
Reset input 777949 777950
Low signal < 5 V < 5 V
High signal > 15 V > 15 V
Current 20 mA 20 mA

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Semiconductor outputs 777949 777950
Number 2 2
Voltage 24 V 24 V
Current 50 mA 50 mA
External supply voltage 24 V 24 V
Voltage tolerance -20 %/+20 % -20 %/+20 %
Relay outputs 777949 777950
Number of output contacts
Safety contacts (N/O), instant-
aneous 2 2
Auxiliary contacts (N/C) 1 1
Max. short circuit current IK 1 kA 1 kA
Utilisation category
In accordance with the standard EN 60947-4-1 EN 60947-4-1
Utilisation category of safety con-
tacts
AC1 at 240 V 240 V
Min. current 0,01 A 0,01 A
Max. current 6 A 6 A
Max. power 1500 VA 1500 VA
DC1 at 24 V 24 V
Min. current 0,01 A 0,01 A
Max. current 6 A 6 A
Max. power 150 W 150 W
Utilisation category of auxiliary con-
tacts
AC1 at 240 V 240 V
Min. current 0,01 A 0,01 A
Max. current 6 A 6 A
Max. power 1500 VA 1500 VA
DC1 at 24 V 24 V
Min. current 0,01 A 0,01 A
Max. current 6 A 6 A
Max. power 150 W 150 W
Utilisation category
In accordance with the standard EN 60947-5-1 EN 60947-5-1
Utilisation category of safety con-
tacts
AC15 at 230 V 230 V
Max. current 3 A 3 A
DC13 (6 cycles/min) at 24 V 24 V
Max. current 4 A 4 A

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Relay outputs 777949 777950
Utilisation category of auxiliary con-
tacts
AC15 at 230 V 230 V
Max. current 3 A 3 A
DC13 (6 cycles/min) at 24 V 24 V
Max. current 4 A 4 A
Utilisation category in accordance
with UL
Voltage 240 V AC G. P. 240 V AC G. P.
With current 6 A 6 A
External contact fuse protection,
safety contacts
In accordance with the standard EN 60947-5-1 EN 60947-5-1
Max. melting integral 66 A²s 66 A²s
Blow-out fuse, quick 6 A 6 A
Blow-out fuse, slow 4 A 4 A
Blow-out fuse, gG 6 A 6 A
Circuit breaker 24V AC/DC,
characteristic B/C 4 A 4 A
External contact fuse protection,
auxiliary contacts
Max. melting integral 66 A²s 66 A²s
Blow-out fuse, quick 6 A 6 A
Blow-out fuse, slow 4 A 4 A
Blow-out fuse, gG 6 A 6 A
Circuit breaker 24 V AC/DC,
characteristic B/C 4 A 4 A
Conventional thermal current 6 A 6 A
Contact material AgCuNi + 0,2 µm Au AgCuNi + 0,2 µm Au
Conventional thermal current
while loading several contacts
777949 777950
Ith per contact at UB DC;
AC1:240V,DC1:24V
Conv. therm. current with 1 con-
tact 6 A 6 A
Conv. therm. current with 2 con-
tacts 4 A 4 A
Times 777949 777950
Max. switch-on delay
After motor standstill max. 1.500 ms 1.500 ms
After power on max. 2.200 ms 2.200 ms
Delay-on de-energisation
After motor on max. 170 ms 170 ms
Recovery time at max. switching
frequency 1/s
After motor on 2.200 ms 2.200 ms