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 documentation 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.
This documentation is valid for the product PNOZ s4. 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 reference.
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
Operating Manual PNOZ s4
21396-EN-17
This describes a situation in which the product or devices could be damaged and also provides information on preventive measures that can be
taken. It also highlights areas within the text that are of particular importance.
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PNOZ s4
INFORMATION
This gives advice on applications and provides information on special features.
Safety
Intended use
The safety relay 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
} Light grids and safety switches with detection of shorts across contacts
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 [ 22]).
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 interference.
Operating Manual PNOZ s4
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PNOZ s4
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 accordance 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 separately.
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 training, 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).
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PNOZ s4
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:
– 3 safety contacts (N/O), instantaneous
– 1 auxiliary contact (N/C), instantaneous
} 1 semiconductor output
} Connection options for:
– E-STOP pushbuttons
– Safety gate limit switches
– Start buttons
– Light grids and safety switches with detection of shorts across contacts
} A connector can be used to connect 1 PNOZsigma contact expansion module
} Operating modes can be set via rotary switch
} LED indicator for:
– Supply voltage
– Input status, channel1
– Input status, channel2
– Switch status of the safety contacts
– Start circuit
– Errors
} Plug-in connection terminals (either spring-loaded terminal or screw terminal)
} See order reference for unit types
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.
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PNOZ s4
Interface
expansion
module
Interface
expansion
module
Block diagram/terminal configuration
Unit types with UB 24 VDC
} UB: 24 VDC; Order no. 750104, 751104, 751184
Fig.: Centre: Front view with cover, right: Front view without cover
*Insulation between the non-marked area and the relay contacts: Basic insulation (overvoltage category III), Protective separation (overvoltage category II)
Unit types with UB 48 - 240 VAC/DC
} UB: 48 - 240 VAC/DC; Order no. 750134, 751134
Fig.: Centre: Front view with cover, right: Front view without cover
*Insulation between the non-marked area and the relay contacts: Basic insulation (overvoltage category III), Protective separation (overvoltage category II)
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PNOZ s4
In2+
In2-
Function description
}
Single-channel operation: no redundancy in the input circuit, earth faults in the start
circuit and input circuit are detected.
} Dual-channel operation without detection of shorts across contacts: Redundant input cir-
cuit, detects PNOZ s4
– earth faults in the start and input circuit,
– short circuits in the input circuit and, with a monitored start, in the start circuit too.
}
Dual-channel operation with detection of shorts across contacts: Redundant input cir-
cuit, detects PNOZ s4
– earth faults in the start and input circuit,
– Short circuits in the input circuit and, with a monitored start, in the start circuit too,
– Shorts across contacts in the input circuit.
} Automatic start: Unit is active once the input circuit has been closed.
} Manual start Unit is active once the input circuit and the start circuit are closed.
} Monitored start with falling edge: Unit is active once
– the input circuit is closed and then the start circuit is closed and opened again.
– the start circuit is closed and then opened again once the input circuit is closed.
} Monitored start with rising edge: Unit is active once the input circuit is closed and
once the start circuit is closed after the waiting period has elapsed (seetechnical details).
} Start with start-up test: The unit checks whether safety gates that are closed are
opened and then closed again when supply voltage is applied.
} Increase in the number of available instantaneous safety contacts by connecting contact
expander modules or external contactors/relays;
A connector can be used to connect 1 PNOZsigma contact expansion module.
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PNOZ s4
[1][2][3][4]
Timing diagram
Legend
} POWER: Supply voltage
} Start: Start circuit
} Input: Input circuits
} Output safe: Safety contacts
} Output aux: Auxiliary contacts
} Out semi: Semiconductor output
} [1]: Automatic start
} [2]: Manual start
} [3]: Monitored start with rising edge
} [4]: Monitored start with falling edge
} a: Input circuit closes before start circuit
} b: Start circuit closes before input circuit
} t1: Switch-on delay
} t2: Delay-on de-energisation
} t3: Waiting period with a monitored start
} t4: Min. start pulse duration with a monitored start
Installation
Install base unit without contact expansion module:
} Ensure that the plug terminator is inserted at the side of the unit.
Connect base unit and PNOZsigma contact expansion module:
} Remove the plug terminator at the side of the base unit and at the contact expansion
module.
} Connect the base unit and the contact expansion module to the supplied connector be-
fore mounting the units to the DIN rail.
Installation in control cabinet
} The safety relay should be installed in a control cabinet with a protection type of at least
IP54.
Operating Manual PNOZ s4
21396-EN-17
} Use the notch on the rear of the unit to attach it to a DIN rail (35mm).
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PNOZ s4
R
lmax
Rl / km
I
max
=
} When installed vertically: Secure the unit by using a fixing element (e.g. retaining bracket
or end angle).
} Push the device upwards or downwards before lifting it from the DIN rail.
Wiring
Please note:
} Information given in the "Technical details [ 22]" must be followed.
} Outputs 13-14, 23-24, 33-34 are safety contacts; output 41-42 is an auxiliary contact (e.g.
for display).
} Auxiliary contact 41-42and semiconductor output Y32 should not be used for safety cir-
cuits!
} To prevent contact welding, a fuse should be connected before the output contacts (see
Technical details [ 22]).
} Calculation of the max. cable length l
in the input circuit:
max
R
= max. overall cable resistance (see Technical details [ 22])
lmax
Rl/km = cable resistance/km
} Use copper wiring with a temperature stability of 75 °C.
} To prevent EMC interferences (particularly common-mode interferences) the measures
described in EN60204-1 must be executed. This includes the separate routing of cables
of the control circuits (input, start and feedback loop) from other cables for energy transmission or the shielding of cables, for example.
} Adequate protection must be provided on all output contacts with capacitive and inductive
loads.
} With UB 48 – 240 VAC/DC: Connect S21 to the functional earth.
} When connecting magnetically operated, reed proximity switches, ensure that the max.
peak inrush current (on the input circuit) does not overload the proximity switch.
} On 24 VDC devices:
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.
NOTICE
If you connect contact expansion modules to a base unit with a universal
power supply, you will need to limit the conventional thermal current at the
contact expansion modules' safety contacts to 70% of the stated current
(see technical details for contact expansion module).
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PNOZ s4
In2-
In2+
In2-
In2+
In2-
In2+
In2-
In2+
In2-
In2+
In2-
In2+
In2-
In2+
In2-
In2+
Preparing for operation
Operating modes
The operating mode is set via the rotary switch on the unit. You can do this by opening the
cover on the front of the unit.
NOTICE
Do not adjust the rotary switch during operation, otherwise an error message will appear, the safety contacts will open and the unit will not be ready
for operation until the supply voltage has been switched off and then on
again.
Set operating modes
} Switch off supply voltage.
} Select operating mode via the operating mode selector switch "mode".
} If the operating mode selector switch "mode" is in its start position (vertical position), an
error message will appear.
Operating mode
selector switch
"mode"
Without detection of shorts
across contacts
With detection of
shorts across
contacts
Automatic or
manual start
Monitored start
rising edge
Monitored start
falling edge
Automatic start
with start-up test
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PNOZ s4
A1
L+
A2
L-
S1
S11
S22
S12
S1
S11
S12
S22
S1
S22
S21
S12
S11
S1
S22
S11
S12
S1
S2
S11
S12
S22
S1
S2
S12
S11
S22
S21
A1
A2S12
S22
24 V DC
GND
Connection
Supply voltageUnit types with
UB 24 VDC
Unit types with
UB 48 - 240 VAC/DC
Input circuitSingle-channelDual-channel
Emergency stop
without detection of shorts
across contacts
Emergency stop
with detection of shorts
across contacts
Safety gate
without detection of shorts
across contacts
Safety gate
with detection of shorts
across contacts
Light beam device or safety
switch, detection of shorts
across contacts via ESPE,
operating mode selector
switch in the position
"without detection of shorts
across contacts"
(only for unit types with
UB = 24 VDC)
NOTICE
With single-channel wiring the safety level of your machine/plant may be
lower than the safety level of the unit (see
data [
35]).
Safety characteristic
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PNOZ s4
K5
K6
K5
L1
N
K6
S12
13 (23,33)
S34
14 (24,34)
S12
S34
S3
K5
K6
K5
L1
K6
S12
S34
S3
N
13 (23,33)
14 (24,34)
NOTICE
When operated with a light grid or sensor
– It must not be possible to switch off the supply voltage for the PNOZ-
sigma separately from the supply voltage for the light grid or safety
switch.
– The operating mode selector switch must be set to "Without detection
of shorts across contacts", as shorts across contacts are detected by
the ESPE.
Start circuit/feedback loop Without feedback loop
monitoring
Automatic start
Monitored, manual start/restart
NOTICE
In the event of an automatic start or manual start with bridged start
contact (fault):
The unit starts up automatically when the safeguard is reset, e.g. when the
E-STOP pushbutton is released. Use external circuit measures to prevent
an unexpected restart.
with feedback loop monitoring
Operating Manual PNOZ s4
21396-EN-17
Unit types with UB 24 VDCUnit types with UB 48 - 240 VAC/DC
*Connect together the 0V connections on all
the external power supplies
Legend
} S1/S2: E-STOP/safety gate switch
} S3: Reset button
}: Switch operated
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PNOZ s4
@
.
0
>
40
. .#
"8
.-=2
-)
.-.)
)-))
-.-
-.-=2
&,%%-
.
....)-
A).
.
#
.
..
)
-
#)
>
.
48*
.-=2
%=
}: Gate open
}: Gate closed
Application examples
Emergency stop
} Dual-channel
} with detection of shorts across contacts
} Monitored start
} falling edge with feedback loop monitoring
Operating Manual PNOZ s4
21396-EN-17
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PNOZ s4
@
.
0
>
40
. .#
"8
.-=2
-)
.-.)
)-))
-.-
-.-=2
&,%%-
.
....)-
A).
)
-
#)
>
.
48*
.
#
.
#.
.-=2
%=
Safety gate
} Dual-channel
} with detection of shorts across contacts
} Monitored start
} falling edge with feedback loop monitoring
Operating Manual PNOZ s4
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PNOZ s4
@
.
0
>
40
. .#
"8
.-=2
-)
.-.)
)-))
-.-
-.-=2
&,%%-
.
....)-
A).
.
48*
#
.
.
.-=2
%=
OSSD signals
} Dual-channel
} without detection of shorts across contacts of PNOZ - detection of shorts across contacts
by sensor technology
} Automatic start
} with feedback loop monitoring
Operating Manual PNOZ s4
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PNOZ s4
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.
The unit is ready for operation when the Power LED is permanently lit.
LEDs indicate the status and errors during operation:
LED on
LED flashes
LED off
INFORMATION
Status indicators and error indicators may occur independently. In the case
of an error display, the "Fault" LED will light or flash (exception: "Supply
voltage too low"). An LED that is also flashing indicates the potential cause
of the error. An LED that is lit and is static indicates a normal operating
status. Several status indicators and error indicators may occur simultaneously.
Status indicators
POWER
Supply voltage is present.
Operating Manual PNOZ s4
21396-EN-17
IN1
Input circuit at S12 is closed.
IN2
Input circuit at S22 is closed.
OUT
Safety contacts are closed and semiconductor output Y32 carries a high signal.
RESET
24 VDC is present at S34.
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PNOZ s4
Error indicators
All LEDs off
Diagnostics: Short across contacts/earth fault; unit switched off
} Remedy: Rectify short across contacts/earth fault, switch off supply voltage
for 1 min.
FAULT
Diagnostics: Plug terminator not connected
} Remedy: Insert plug terminator, switch supply voltage off and then on again.
FAULT
Diagnostics: Internal error, unit defective
} Remedy: Switch supply voltage off and then on again, change unit if neces-
sary.
POWER
Diagnostics: Supply voltage too low
} Remedy: Check supply voltage and increase if necessary.
IN1, IN2 alternatelyFAULT
Diagnostics: Connection error (possibly: cable resistance in the input circuit is
too high) or short detected between S12 and S22
} Remedy: Rectify connection error or short across contacts, switch supply
voltage off and then on again.
IN1FAULT
Diagnostics: Power-up blocked due to short-term interruption at S12; input circuits not operated simultaneously
} Remedy: Open both input circuits, S12 and S22, simultaneously and then
close again.
IN2FAULT
Diagnostics: Power-up blocked due to short-term interruption at S22; input circuits not operated simultaneously
} Remedy: Open both input circuits, S12 and S22, simultaneously and then
close again.
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PNOZ s4
RESETFAULT
Diagnostics: Position of rotary switch is not permitted or rotary switch was adjusted during operation.
} Remedy: Switch supply voltage off and then on again.
POWER, IN1, IN2, OUT, RESET, FAULT
Diagnostics: The operating mode selector switch "mode" is in its start position
(vertical position)
} Remedy: Switch off the supply voltage and set the required operating mode
on operating mode selector switch "mode".
Faults - malfunctions
} Contact malfunctions: If the contacts have welded, reactivation will not be possible after
the input circuit has opened.
Dimensions in mm
*with spring-loaded terminals
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PNOZ s4
Technical details Order no. 750104, 750134, 751104
General750104750134751104
CCC, CE, EAC (Eurasian), KOSHA, TÜV, cU-
Certifications
Lus Listed
Electrical data750104750134751104
Supply voltage
Voltage24 V48 - 240 V24 V
KindDCAC/DCDC
Voltage tolerance-15 %/+10 %-15 %/+10 %-15 %/+10 %
Output of external
power supply (AC)–5 VA–
Output of external
power supply (DC)2,5 W2,5 W2,5 W
Frequency range AC–50 - 60 Hz–
Residual ripple DC20 %160 %20 %
Duty cycle100 %100 %100 %
Max. inrush current impulse
Current pulse, A10,5 A–0,5 A
Pulse duration, A15 ms–5 ms
Inputs750104750134751104
Number222
Voltage at
Input circuit DC24 V24 V24 V
Start circuit DC24 V24 V24 V
Feedback loop DC24 V24 V24 V
Current at
Input circuit DC50 mA50 mA50 mA
Start circuit DC50 mA50 mA50 mA
Feedback loop DC50 mA50 mA50 mA
Max. inrush current impulse
Current pulse, input circuit0,2 A0,2 A0,2 A
Pulse duration, input
circuit100 ms100 ms100 ms
Current pulse, feedback loop0,2 A0,2 A0,2 A
Pulse duration, feedback loop15 ms15 ms15 ms
Current pulse, start circuit0,2 A0,2 A0,2 A
Pulse duration, start
circuit15 ms15 ms15 ms
Min. input resistance at
power-on110 Ohm110 Ohm110 Ohm
Dual-channel without
detection of shorts
across contacts at UB
DC60 Ohm30 Ohm60 Ohm
Dual-channel without
detection of shorts
across contacts at UB
AC–30 Ohm–
Dual-channel with detection of shorts across
contacts at UB DC30 Ohm30 Ohm30 Ohm
Dual-channel with detection of shorts across
contacts at UB AC–30 Ohm–
Semiconductor outputs 750104750134751104
Number111
Voltage24 V24 V24 V
Current20 mA20 mA20 mA
Residual current at "0"
signal0,1 mA0,1 mA0,1 mA
Max. internal voltage drop 5 V–5 V
Conditional rated short circuit current100 A100 A100 A
Lowest operating current0 mA0 mA0 mA
Utilisation category in accordance with EN
60947-1DC-12DC-12DC-12
Relay outputs750104750134751104
Number of output contacts
Safety contacts (N/O),
instantaneous333
Auxiliary contacts (N/C) 111
Max. short circuit current
IK1 kA1 kA1 kA
Utilisation category
In accordance with the
standardEN 60947-4-1EN 60947-4-1EN 60947-4-1
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PNOZ s4
Relay outputs750104750134751104
Utilisation category of
safety contacts
AC1 at240 V240 V240 V
Min. current0,003 A0,003 A0,003 A
Max. current6 A6 A6 A
Min. output0,04 VA0,04 VA0,04 VA
Max. power1500 VA1500 VA1500 VA
DC1 at24 V24 V24 V
Min. current0,003 A0,003 A0,003 A
Max. current6 A6 A6 A
Min. output0,04 W0,04 W0,04 W
Max. power150 W150 W150 W
Utilisation category of
auxiliary contacts
AC1 at240 V240 V240 V
Min. current0,003 A0,003 A0,003 A
Max. current6 A6 A6 A
Min. output0,04 VA0,04 VA0,04 VA
Max. power1500 VA1500 VA1500 VA
DC1 at24 V24 V24 V
Min. current0,003 A0,003 A0,003 A
Max. current6 A6 A6 A
Min. output0,04 W0,04 W0,04 W
Max. power150 W150 W150 W
Utilisation category
In accordance with the
standardEN 60947-5-1EN 60947-5-1EN 60947-5-1
Utilisation category of
safety contacts
AC15 at230 V230 V230 V
Max. current5 A3 A5 A
DC13 (6 cycles/min) at 24 V24 V24 V
Max. current5 A4 A5 A
Utilisation category of
auxiliary contacts
AC15 at230 V230 V230 V
Max. current5 A3 A5 A
DC13 (6 cycles/min) at 24 V24 V24 V
Max. current5 A4 A5 A
Utilisation category in accordance with UL
Voltage
240 V AC G.U. (same polarity)
240 V AC G.U. (same polarity)
240 V AC G.U. (same polarity)
With current6 A6 A6 A
Voltage24 V DC G. U.24 V DC G. U.24 V DC G. U.
With current6 A6 A6 A
Explanatory notes for the safety-related characteristic data:
} The SIL CL value in accordance with EN 62061 corresponds to the SIL value in accord-
ance with EN 61508.
} TM is the maximum mission time in accordance with EN ISO 13849-1. The value also ap-
plies as the retest interval in accordance with EN 61508-6 and IEC 61511 and as the
proof test interval and mission time in accordance with EN 62061.
All the units used within a safety function must be considered when calculating the safety
characteristic data.
INFORMATION
A safety function's SIL/PL values are not identical to the SIL/PL values of
the units that are used and may be different. We recommend that you use
the PAScal software tool to calculate the safety function's SIL/PL values.
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PNOZ s4
Classification according to ZVEI, CB24I
The following tables describe the classes and specific values of the product interface and
the classes of interfaces compatible with it. The classification is described in the ZVEI position paper "Classification of Binary 24 V Interfaces - Functional Safety aspects covered by
dynamic testing".
Input
Interfaces
Drain
InterfaceModule
ClassC0
Source
InterfaceSensor
ClassC1, C2, C3
Drain parameters
Max. test pulse duration2 ms
Min. input resistance0,5 kOhm
Max. capacitive load10 nF
Relay outputs
Interfaces
Source
InterfaceModule
ClassA
Drain
InterfaceActuator
ClassA
Source parameters
Min. switching voltage12 V
Max. switching voltage250 V
Min. switching current0,003 A
Max. switching current6 A
Potential isolationyes
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PNOZ s4
Cycles x 1000
Switching current (A)
Supplementary data
CAUTION!
It is essential to consider the relay's service life graphs. The relay outputs'
safety-related characteristic data is only valid if the values in the service life
graphs are met.
The PFH value depends on the switch frequency and the load of the relay output.
If the service life graphs are not accessible, the stated PFH value can be used irrespective
of the switch frequency and the load, as the PFH value already considers the relay's B10d
value as well as the failure rates of the other components.
Service life graph
The service life graphs indicate the number of cycles from which failures due to wear must
be expected. The wear is mainly caused by the electrical load; the mechanical load is negligible.
Unit types with UB 24 VDC
} UB: 24 VDC; Order no. 750104, 751104, 751184
Fig.: Service life graphs at 24 V DC and 230 V AC
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PNOZ s4
Cycles x 1000
Switching current (A)
Fig.: Service life graphs at 110 V DC
Example
} Inductive load: 0.2 A
} Utilisation category: AC15
} Contact service life: 2 000 000 cycles
Provided the application to be implemented requires fewer than 2 000 000 cycles, the PFH
value (see
Technical details [ 22]) can be used in the calculation.
To increase the service life, sufficient spark suppression must be provided on all output
contacts. With capacitive loads, any power surges that occur must be noted. With DC contactors, use flywheel diodes for spark suppression.
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1000
5000
100
500
10
50
0,10,5123 4 5 68 10
DC-1: 24VDC-1: 24V
AC-1: 230V
AC-1: 230V
AC-15: 230V
AC-15: 230V
DC-13: 24VDC-13: 24V
Number of operating cycles x 1000
Switching current (A)
Number of cycles x 1000
Switching current (A)
Unit types with UB 48-240 VAC/DC
} UB: 48 – 240 VAC/DC; Order no. 750134, 751134
Fig.: Service life graphs at 24 VDC and 230 VAC
Fig.: Service life graphs at 110 VDC
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Example
} Inductive load: 0.2 A
} Utilisation category: AC15
} Contact service life: 1 000 000 cycles
Provided the application to be implemented requires fewer than 1 000 000 cycles, the PFH
value (see
Technical details [ 22]) can be used in the calculation.
To increase the service life, sufficient spark suppression must be provided on all relay contacts. With capacitive loads, any power surges that occur must be noted. With DC contactors, use flywheel diodes for spark suppression.
Permitted operating height
The values stated in the technical details apply to the use of the device in operating heights
up to max. 2000 m above sea level. When used in greater heights, constraints have to be
taken into account:
} Permitted maximum operating height 5000 m
} Only device versions with UB 24 V DC are permitted (order no. 750104, 751104, 751184)
} Reduction of rated insulation voltage and rated impulse withstand voltage for applications
with safe separation:
Maximum operation
height
Rated insulation
voltage
Overvoltage categoryMax. rated impulse
withstand voltage
3000 m150 VII2.5 kV
100 VIII2.5 kV
4000 m150 VII2.5 kV
100 VIII2.5 kV
5000 m100 VII1.5 kV
24 VIII0.8 kV
} Reduction of rated insulation voltage and rated impulse withstand voltage for applications
with basic insulation:
Maximum operation
height
Rated insulation voltage Overvoltage categoryMax. rated impulse
withstand voltage
3000 m250 VII2.5 kV
150 VIII2.5 kV
4000 m250 VII2.5 kV
150 VIII2.5 kV
5000 m150 VII1.5 kV
100 VIII1.5 kV
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} From an operating height of 2000 m the max. permitted ambient temperature is reduced
by 0.5 °C/100 m
Operating heightPermitted ambient temperature
3000 m50 °C
4000 m45 °C
5000 m40 °C
Remove plug-in terminals
Procedure: Insert the screwdriver into the housing recess behind the terminal and lever the
terminal out.
Do not remove the terminals by pulling the cables!
This product/these products meet the requirements of the directive 2006/42/EC for machinery of the European Parliament and of the Council. The complete EC Declaration of
Conformity is available on the Internet at www.pilz.com/downloads.
Authorised representative: Norbert Fröhlich, Pilz GmbH & Co. KG, Felix-Wankel-Str. 2,
73760 Ostfildern, Germany
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of Pilz GmbH & Co. KG in some countries. We would point out that product features may vary from the details stated in this document, depending on the status at the time of publication
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