Pilz PNOZ s3 Series User manual

PNOZ s3
Operating Manual-21395-EN-10
Safety 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 internal purposes. Suggestions and comments for improving this documentation 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

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Operating Manual PNOZ s3
21395-EN-10 3
PNOZ s3 safety relay
The safety relay provides a safety-related interruption of a safety circuit.
The safety relay meets the requirements of EN 60947-5-1, EN 60204-1 and VDE 0113-1
and may be used in applications with
}E-STOP pushbuttons
}Safety gates
}Light beam devices
For your safety
}Only install and commission the unit if you have read and understood these operating
instructions and are familiar with the applicable regulations for health and safety at work
and accident prevention.
Ensure VDE and local regulations are met, especially those relating to safety.
}Any guarantee is rendered invalid if the housing is opened or unauthorised modifica-
tions are carried out.
Unit features
}Positive-guided relay outputs:
– 2 safety contacts (N/O), instantaneous
}1 semiconductor output
}Connection options for:
– E-STOP pushbutton
– Safety gate limit switch
– Start button
– Light beam device
– PSEN
}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, channel 1
– Input status, channel 2
– Switch status channel 1/2
– Start circuit
– Error
}Plug-in connection terminals (either spring-loaded terminal or screw terminal)

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Safety features
The 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.
}The unit has an electronic fuse.
Block diagram/terminal configuration
InputInput
A1 A2 S21 S22

Power
Reset/
Start
S34
S11 S12

Y32
K1
K2
13 23
24
14
Interface
expansion
unit

Centre: Front view with cover, right: Front view without cover
*Insulation between the non-marked area and the relay contacts: Basic insulation (overvolt-
age category III), safe separation (overvoltage category II)
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
– 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
– 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 between contacts in the input circuit.
}Automatic start: Unit is active once the input circuit has been closed.

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}Manual start: Unit is active once the input circuit is closed and then the start circuit is
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 (see technical de-
tails).
}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 con-
tact expander modules or external contactors/relays;
A connector can be used to connect 1 PNOZsigma contact expander module.
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.
}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 brack-
et 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" must be followed.
}The outputs 13-14, 23-24 are safety contacts.
}Semiconductor output Y32 should not be used for safety circuits!
}To prevent contact welding, a fuse should be connected before the output contacts (see
technical details).

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}Calculation of the max. cable length lmax in the input circuit:




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.
}When connecting magnetically operated, reed proximity switches, ensure that the max.
peak inrush current (on the input circuit) does not overload the proximity switch.
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.
CAUTION!
Do not adjust the rotary switch during operation, otherwise an error mes-
sage 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"
Automatic/man-
ual start
Monitored start
rising edge
Monitored start
falling edge
Automatic start
with start-up test
Without detec-
tion of shorts
across contacts








With detection of
shorts across
contacts









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Connection
}Supply voltage
Supply voltage AC DC
 
 
}Input circuit
Input circuit Single-channel Dual-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 with detection of
shorts across contacts via
ESPE






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}Start circuit/feedback loop
Start circuit/feedback loop Start circuit Feedback loop
Automatic start
 








Manual/monitored start



 
 







}Semiconductor output
*Connect together the 0V connections on all the external power supplies
Operation
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
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 sta-
tus. Several status indicators and error indicators may occur simultaneously.

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Status indicators
Power
Supply voltage is present.
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 V DC is present at S34.
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 the supply voltage.
In1, In2 alternately
Fault
Diagnostics: Short detected between S12 and S22
}Remedy: Rectify short across contacts, switch supply voltage off and then
on again.

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In1
Fault
Diagnostics: Power-up blocked due to short-term interruption at S12; input cir-
cuits not operated simultaneously
}Remedy: Open both input circuits, S12 and S22, simultaneously and then
close again.
In2
Fault
Diagnostics: Power-up blocked due to short-term interruption at S22; input cir-
cuits not operated simultaneously
}Remedy: Open both input circuits, S12 and S22, simultaneously and then
close again.
Reset
Fault
Diagnostics: Position of rotary switch is not permitted or rotary switch was ad-
justed 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.