Pilz PNOZ X2.7P User manual

PNOZ X2.7P
Operating Manual-1004081-EN-19
}Safety relays

Preface
This document is a translation of 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.
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
1004081-EN-19 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
Type: 24 VAC/DC 9
Type: 24 - 240 V AC/DC 9
Function Description 10
Operating modes 10
Timing diagram 11
Installation 11
Wiring 12
Preparing for operation 13
Operation 14
Status indicators 15
Faults – Interference 15
Dimensions in mm 16
Technical details 16
Safety characteristic data 26
Supplementary data 26
Service life graph 27

Contents
Operating Manual
1004081-EN-19 4
Remove plug-in terminals 29
Order reference 30
EC declaration of conformity 30

PNOZ X2.7P
Operating Manual
1004081-EN-19 5
Introduction
Validity of documentation
This documentation is valid for the product PNOZ X2.7P. 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 X2.7P
Operating Manual
1004081-EN-19 6
INFORMATION
This gives advice on applications and provides information on special fea-
tures.
Safety
Intended use
The safety relay PNOZ X2.7P 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 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 [ 16]).
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 unit 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.

PNOZ X2.7P
Operating Manual
1004081-EN-19 7
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 this description under "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).
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 X2.7P
Operating Manual
1004081-EN-19 8
Unit features
}Positive-guided relay outputs:
– 3 safety contacts (N/O), instantaneous
– 1 auxiliary contact (N/C), instantaneous
}Connection options for:
– E-STOP pushbuttons
– Safety gate limit switches
– Start button
– Light guards and safety switches
}LED display for:
– Supply voltage
– Switch status of the safety contacts
}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.

PNOZ X2.7P
Operating Manual
1004081-EN-19 9
Block diagram/terminal configuration
Type: 24 VAC/DC
}UB: 24 VAC/DC; Order no. 777305, 787305
S11 S52 S21 S22 S12 S34
*Insulation between the non-marked area and the relay contacts: Basic insulation (over-
voltage category III), Protective separation (overvoltage category II)
Type: 24 - 240 V AC/DC
}UB: 24 – 240 VAC/DC; Order no. 777306, 787306
S11 S52 S21 S22 S12 S34
*Insulation between the non-marked area and the relay contacts: Basic insulation (over-
voltage category III), Protective separation (overvoltage category II)

PNOZ X2.7P
Operating Manual
1004081-EN-19 10
Function Description
The safety relay PNOZ X2.7P 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 S12-S34 is closed.
}Input circuit is closed (e.g. E-STOP pushbutton not operated):
– LEDs "CH1" and "CH2" will light.
– Safety contacts 13-14, 23-24 and 33-34 are closed, auxiliary contact 41-42 is open.
The unit is active.
}Input circuit is opened (e.g. E-STOP pushbutton operated):
– The LEDs "CH1" and "CH2" go out.
– Safety contacts 13-14, 23-24 and 33-34 are opened redundantly, auxiliary contact
41-42 is closed.
Operating modes
}Single-channel operation: No redundancy in the input circuit, earth faults in the start
and input circuit are detected.
}Dual-channel operation without detection of shorts across contacts: Redundant input
circuit, detects PNOZ X2.7P
– earth faults in the start and input circuit,
– short circuits in the input circuit.
}Dual-channel operation with detection of shorts across contacts: Redundant input cir-
cuit, PNOZ X2.7P detects
– earth faults in the start and input circuit,
– short circuits in the 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 [ 16]).
}Increase in the number of available contacts by connecting contact expander modules
or external contactors/relays.

PNOZ X2.7P
Operating Manual
1004081-EN-19 11
Timing diagram
Legend
}Power: Supply voltage
}Start: Start circuit
}Input: Input circuit
}Output safe: Safety contacts
}Output aux: Auxiliary contact
}t1: Switch-on delay
}t2: Delay-on de-energisation
}t3: Waiting period
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).

PNOZ X2.7P
Operating Manual
1004081-EN-19 12
Wiring
Please note:
}Information given in the "Technical details [ 16]" 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 41-42 shouldnot be used for safety circuits!
}To prevent contact welding, a fuse should be connected before the output contacts (see
Technical details [ 16]).
}Calculation of the max. cable length lmax in the input circuit:
Rlmax
Rl / km
Imax =
Rlmax = max. overall cable resistance (see Technical details [ 16])
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.
}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 VAC/DC units:
The power supply must comply with the regulations for extra low voltages with safe
electrical separation (SELV, PELV) in accordance with VDE 0100, Part 410.
}Ensure the wiring and EMC requirements of EN 60204-1 are met.
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 X2.7P
Operating Manual
1004081-EN-19 13
Preparing for operation
Supply voltage AC DC
UB = 24 VAC/DC;
Order no. 777305, 787305
A1
A2
L1
N
A1
A2
L+
L-
UB = 24 - 240 VAC/DC;
Order no. 777306, 787306
A1
A2
L1
N
S21
A1
A2
L+
L-
S21
Input circuit Single-channel Dual-channel
E-STOP
without detection of shorts
across contacts
S1
S22
S21
S11
S52
S12
S1
S11
S12
S52
S22
S21
E-STOP
with detection of shorts across
contacts
S1
S22
S21
S12
S11
S52
S11
Safety gate
without detection of shorts
across contacts
S1
S22
S21
S11
S52
S12
Safety gate
with detection of shorts across
contacts
Light guards or safety switch, de-
tection of shorts across contacts
via ESPE
(only when UB = 24 VDC);
Order no. 777305, 787305)

PNOZ X2.7P
Operating Manual
1004081-EN-19 14
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 [ 26]).
NOTICE
Operation with a light guard or safety switch
It must not be possible to switch off the supply voltage for the PNOZ X2.7P
separately from the supply voltage for the light guard or safety switch.
Start circuit Single-channel Dual-channel
Monitored start
Feedback loop Automatic start Monitored start
Contacts from external contact-
ors
K5 K6
K5 L1
K6
S12
S34
S3
N
13 (23, 33)
14 (24 ,34)
Legend
}S1/S2: E-STOP/safety gate switch
}S3: Reset button
}: Switch operated
}: Gate open
}: Gate closed
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.

PNOZ X2.7P
Operating Manual
1004081-EN-19 15
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.
Status indicators
LEDs indicate the status and errors during operation:
LED on
POWER
Supply voltage is present.
CH.1
Safety contacts of channel 1 are closed.
CH.2
Safety contacts of channel 2 are closed.
Faults – Interference
}Earth fault: The supply voltage fails and the safety contacts open. Once the cause of
the respective fault has been rectified and the supply voltage is switched off for approx.
1minute, the unit is ready for operation again.
}Contact malfunctions: If the contacts have welded, reactivation will not be possible after
the input circuit has opened.
}LED "POWER" does not light: Short circuit or no supply voltage.

PNOZ X2.7P
Operating Manual
1004081-EN-19 16
Dimensions in mm
* with spring-loaded terminals
Technical details
Order no. 777305 – 777306
See below for more order numbers
General 777305 777306
Approvals
CCC, CE, EAC (Eurasian), TÜV,
cULus Listed
CCC, CE, EAC (Eurasian), TÜV,
cULus Listed
Electrical data 777305 777306
Supply voltage
Voltage 24 V 24 - 240 V
Kind AC/DC AC/DC
Voltage tolerance -15 %/+10 % -15 %/+10 %
Output of external power supply
(AC) 5,5 VA 4,5 VA
Output of external power supply
(DC) 2,5 W 2 W
Frequency range AC 50 - 60 Hz 50 - 60 Hz
Residual ripple DC 160 % 160 %
Duty cycle 100 % 100 %
Max. inrush current impulse
Current pulse, A1 1,7 A –
Pulse duration, A1 3,3 ms –
Inputs 777305 777306
Number 2 2
Voltage at
Input circuit DC 24 V 24 V
Start circuit DC 24 V 24 V
Feedback loop DC 24 V 24 V

PNOZ X2.7P
Operating Manual
1004081-EN-19 17
Inputs 777305 777306
Current at
Input circuit DC 30 mA 25 mA
Start circuit DC 40 mA 50 mA
Feedback loop DC 40 mA 50 mA
Min. input resistance at power-on 71 Ohm 141 Ohm
Max. overall cable resistance Rl-
max
Single-channel at UB DC 30 Ohm 45 Ohm
Single-channel at UB AC 100 Ohm 45 Ohm
Dual-channel without detection
of shorts across contacts at UB
DC 50 Ohm 80 Ohm
Dual-channel without detection
of shorts across contacts at UB
AC 100 Ohm 80 Ohm
Dual-channel with detection of
shorts across contacts at UB DC 15 Ohm 15 Ohm
Dual-channel with detection of
shorts across contacts at UB AC 15 Ohm 15 Ohm
Relay outputs 777305 777306
Number of output contacts
Safety contacts (N/O), instant-
aneous 3 3
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

PNOZ X2.7P
Operating Manual
1004081-EN-19 18
Relay outputs 777305 777306
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 5 A 3 A
DC13 (6 cycles/min) at 24 V 24 V
Max. current 5 A 4 A
Utilisation category of auxiliary con-
tacts
AC15 at 230 V 230 V
Max. current 5 A 3 A
DC13 (6 cycles/min) at 24 V 24 V
Max. current 5 A 4 A
Utilisation category in accordance
with UL
Voltage 240 V AC G.U. (same polarity) 250 V AC G.U. (same polarity)
With current 6 A 6 A
Voltage 24 V DC G. P. 24 V DC G. P.
With current 6 A 6 A
Pilot Duty R300 B300, R300
External contact fuse protection,
safety contacts
In accordance with the standard EN 60947-5-1 EN 60947-5-1
Max. melting integral 260 A²s 66 A²s
Blow-out fuse, quick 10 A 6 A
Blow-out fuse, slow 6 A 4 A
Blow-out fuse, gG 6 A 6 A
Circuit breaker 24V AC/DC,
characteristic B/C 6 A 4 A
External contact fuse protection,
auxiliary contacts
Max. melting integral 160 A²s 66 A²s
Blow-out fuse, quick 10 A 6 A
Blow-out fuse, slow 6 A 4 A
Blow-out fuse, gG 6 A 6 A
Circuit breaker 24 V AC/DC,
characteristic B/C 6 A 4 A
Contact material AgCuNi + 0,2 µm Au AgCuNi + 0,2 µm Au

PNOZ X2.7P
Operating Manual
1004081-EN-19 19
Conventional thermal current
while loading several contacts
777305 777306
Ith per contact at UB AC;
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 6 A
Conv. therm. current with 3 con-
tacts 3,5 A 4,5 A
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 6 A 6 A
Conv. therm. current with 3 con-
tacts 5 A 4,5 A
Times 777305 777306
Switch-on delay
With monitored start typ. 30 ms 30 ms
With monitored start max. 50 ms 40 ms
Delay-on de-energisation
With E-STOP typ. 15 ms 10 ms
With E-STOP max. 30 ms 20 ms
With power failure typ. 60 ms –
With power failure max. 100 ms –
With power failure typ. UB 240 V – 1100 ms
With power failure max. UB 240
V – 1500 ms
With power failure typ. UB 24 V – 180 ms
With power failure max. UB 24 V – 230 ms
Recovery time at max. switching
frequency 1/s
After E-STOP 50 ms 50 ms
After power failure 200 ms 1500 ms
Waiting period with a monitored
start 250 ms 300 ms
Min. start pulse duration with a
monitored start 30 ms 30 ms
Supply interruption before de-ener-
gisation 20 ms 20 ms
Simultaneity, channel 1 and 2 max. ∞ ∞
Environmental data 777305 777306
Climatic suitability EN 60068-2-78 EN 60068-2-78
Ambient temperature
Temperature range -35 - 55 °C -10 - 55 °C

PNOZ X2.7P
Operating Manual
1004081-EN-19 20
Environmental data 777305 777306
Storage temperature
Temperature range -40 - 85 °C -40 - 85 °C
Climatic suitability
Humidity 93 % r. h. at 40 °C 93 % r. h. at 40 °C
Condensation during operation Not permitted Not permitted
EMC EN 60947-5-1, EN 61000-6-2, EN
61000-6-4, EN 61326-3-1
EN 60947-5-1, EN 61000-6-2, EN
61000-6-4, EN 61326-3-1
Vibration
In accordance with the standard EN 60068-2-6 EN 60068-2-6
Frequency 10 - 55 Hz 10 - 55 Hz
Amplitude 0,35 mm 0,35 mm
Airgap creepage
In accordance with the standard EN 60947-1 EN 60947-1
Overvoltage category III / II III / II
Pollution degree 2 2
Rated insulation voltage 250 V 250 V
Rated impulse withstand voltage 4 kV 4 kV
Protection type
Housing IP40 IP40
Terminals IP20 IP20
Mounting area (e.g. control cab-
inet) IP54 IP54
Mechanical data 777305 777306
Mounting position Any Any
Mechanical life 10,000,000 cycles 10,000,000 cycles
Material
Bottom PPO UL 94 V0 PPO UL 94 V0
Front ABS UL 94 V0 ABS UL 94 V0
Top PPO UL 94 V0 PPO UL 94 V0
Connection type Screw terminal Screw terminal
Mounting type plug-in plug-in
Conductor cross section with screw
terminals
1 core flexible 0,25 - 2,5 mm², 24 - 12 AWG 0,25 - 2,5 mm², 24 - 12 AWG
2 core with the same cross sec-
tion, flexible with crimp connect-
ors, no plastic sleeve 0,25 - 1 mm², 24 - 16 AWG 0,25 - 1 mm², 24 - 16 AWG
2 core with the same cross sec-
tion, flexible without crimp con-
nectors or with TWIN crimp con-
nectors 0,2 - 1,5 mm², 24 - 16 AWG 0,2 - 1,5 mm², 24 - 16 AWG
Torque setting with screw terminals 0,5 Nm 0,5 Nm
Dimensions
Height 94 mm 94 mm
Width 22,5 mm 22,5 mm
Depth 121 mm 121 mm