schmersal CSS 34F0 User manual

CSS 34F0
CSS 34F1
Operating instructions
Safety sensor
EN 1
1. About this document
1.1 Function
This operating instructions manual provides all the information you
need for the mounting, set-up and commissioning to ensure the safe
operation and disassembly of the safety switchgear. he operating
instructions must be available in a legible condition and a complete
version in the vicinity of the device.
1.2 Target group: authorised qualified personnel
All operations described in this operating instructions manual must
be carried out by trained specialist personnel, authorised by the plant
operator only.
Please make sure that you have read and understood these operating
instructions and that you know all applicable legislations regarding
occupational safety and accident prevention prior to installation and
putting the component into operation.
The machine builder must carefully select the harmonised standards to
be complied with as well as other technical specifications for the selec-
tion, mounting and integration of the components.
1.3 Explanation of the symbols used
Information, hint, note:
This symbol is used for identifying useful additional information.
Caution: Failure to comply with this warning notice could
lead to failures or malfunctions.
Warning: Failure to comply with this warning notice could
lead to physical injury and/or damage to the machine.
1.4 Appropriate use
The products described in these operating instructions are developed to
execute safety-related functions as part of an entire plant or machine. It
is the responsibility of the manufacturer of a machine or plant to ensure
the correct functionality of the entire machinery or plant.
The safety switchgear must be exclusively used in accordance with the
versions listed below or for the applications authorised by the manufac-
turer. Detailed information regarding the range of applications can be
found in the chapter "Product description".
1.5 General safety instructions
The user must observe the safety instructions in this operating instruc-
tions manual, the country-specific installation standards as well as all
prevailing safety regulations and accident prevention rules.
Further technical information can be found in the Schmersal
catalogues or in the online catalogue on the Internet:
www.schmersal.net.
The information contained in this operating instructions manual is pro-
vided without liability and is subject to technical modifications.
Content
1 About this document
1.1 Function ..............................................1
1.2 Target group: authorised qualied personnel..................1
1.3 Explanation of the symbols used ...........................1
1.4 Appropriate use ........................................1
1.5 General safety instructions ...............................1
1.6 Warning about misuse ...................................2
1.7 Exclusion of liability .....................................2
2 Product description
2.1 Ordering code .........................................2
2.2 Special versions........................................2
2.3 Comprehensive quality insurance to 2006/42/EC ..............2
2.4 Destination and use .....................................2
2.5 Technical data .........................................3
2.6 Safety classication .....................................3
3 Mounting
3.1 General mounting instructions .............................3
3.2 Dimensions ...........................................4
3.3 Actuating positions of the safety sensor with regard to the actuator4
3.4 Switching distance ......................................4
3.5 Adjustment............................................5
4 Electrical connection
4.1 General information for electrical connection..................5
4.2 Series-wiring ..........................................5
5 Set-up and maintenance
5.1 Functional testing.......................................6
5.2 Maintenance ..........................................6
6 Diagnostic functions
6.1 Operating principle of the diagnostic LED's ...................6
6.2 Operating principle of the electronic diagnostic output ..........6
6.3 Safety-sensors with serial diagnostic function .................7
7 Disassembly and disposal
7.1 Disassembly...........................................8
7.2 Disposal ..............................................8
8 Appendix
8.1 Wiring examples .......................................8
8.2 Connection example ...................................11
9 Declaration of conformity
9.1 EC Declaration of conformity .............................12
x.000 / 07.2015 / v.A. - 101191603-EN / D / 2015-07-06 / AE-Nr. 4883
EN Operating instructions. . . . . . . . . . . .pages 1 to 12
Translation of the original operating instructions

2
Operating instructions
Safety sensor
CSS 34F0
CSS 34F1
EN
There are no residual risks, provided that the safety instructions as well
as the instructions regarding mounting, commissioning, operation and
maintenance are observed.
1.6 Warning about misuse
In case of improper use or manipulation of the safety switch-
gear, personal hazards or damages to machinery or plant
components cannot be excluded when safety switchgear is
used. The relevant requirements of the standard ISO 14119
must be observed.
1.7 Exclusion of liability
We shall accept no liability for damages and malfunctions resulting from
defective mounting or failure to comply with this operating instructions
manual. The manufacturer shall accept no liability for damages result-
ing from the use of unauthorised spare parts or accessories.
For safety reasons, invasive work on the device as well as arbitrary re-
pairs, conversions and modifications to the device are strictly forbidden;
the manufacturer shall accept no liability for damages resulting from
such invasive work, arbitrary repairs, conversions and/or modifications
to the device.
2. Product description
2.1 Ordering code
This operating instructions manual applies to the following types:
CSS-
➀
-34-
➁
-
➂
-
➃
-M-ST
No. Option Description
➀
12
14
Switching distance Sn(mm)
Actuation from top
Actuation from side
➁
F0
F1
Relay feedback without
edge monitoring
with edge monitoring
➂
S lateral active surface
V frontal active surface
➃
D With diagnostic output
SD with serial diagnostic function
Only if the information described in this operating instructions
manual are realised correctly, the safety function and therefo-
re the compliance with the Machinery Directive is maintained.
2.2 Special versions
For special versions, which are not listed in the order code below 2.1,
these specifications apply accordingly, provided that they correspond to
the standard version.
2.3 Comprehensive quality insurance to 2006/42/EC
Schmersal is a certified company to appendix X of the Machinery Di-
rective. As a result, Schmersal is entitled to autonomously conduct the
conformity assessment procedure for the products listed in Appendix
IV of the MD without involving a notified body. The EC prototype test
certificates are available upon request or can be downloaded from the
Internet at www.schmersal.com.
2.4 Destination and use
This non-contact, electronic safety sensor is designed for application
in safety circuits and is used for monitoring the position of movable
safety guards. In this application, the safety sensor monitors the closed
position of hinged, sliding or removable safety guards by means of the
coded electronic CST 34 or CST 180 actuators (refer to table "Actuators
and switching distances").
The sensor additionally executes functions of a safety-monitoring
module. At both safety outputs, two auxiliary contactors1) or relays1)
can be connected, whose safety-related function is checked by the
sensor by means of a feedback circuit. The feedback circuit includes
the series-wiring of the NC contacts of the auxiliary contactors1) or re-
lays1). For the F0 version, a so-called "enabling switch" (without safety
function) can be integrated in this feedback circuit. For the F1 version,
a so-called "reset button" is required, which is monitored for a trailing
edge. This function corresponds to the "manual reset function" to ISO
13849-1.
1) with positive-guided contacts to IEC 60947-5-1 or
EN 50205
The safety switchgears are classified according to ISO
14119 as type 4 switching devices.
Mode of operation of the safety outputs
The safety outputs can be integrated into the safety circuit of the control
system. The opening of a safety guard, i.e. the actuator is removed out
of the active zone of the sensor, will immediately disable the safety out-
puts of the sensor (refer to table “Actuators and switching distances”).
Any error that does not immediately affect the functionality of the safety
sensor (e.g. the ambient temperature being too high, interference
potential at a safety output, cross-wire short) will lead to a delayed
shut-down. The safety outputs are disabled after 30 minutes if the error
is not rectified. The signal combination, diagnostic output disabled and
safety channels still enabled, can be used to stop the production pro-
cess in a controlled manner. After fault rectification, the error message
is reset by opening and re-closing the corresponding safety guard.
The safety outputs enable and allow a restart. For devices with serial
diagnostic, a bit can be set/deleted in the call telegram to reset the fault.
If more than one fault is detected, the device must be isolated from the
voltage supply after the fault rectification is reset.
Safety-sensors with serial diagnostic function
The safety sensor indicates the operating condition and faults by means
of three-colour LED's located in the lateral surfaces of the sensor. A
diagnostic output additionally indicates the operating condition. These
signals can be used in a downstream control. The diagnostic output of
the CSS 34 safety sensor alternatively can be used as conventional
output or as “serial output“ with input and output channel. The serial
connections of the individual sensors are wired in series together with
other devices and connected to a fieldbus Gateway.
Series-wiring
Max. 31 sensors can be wired in series. In this way, a 200 m long sen-
sor chain can be set up. The self-monitoring safety sensors of the CSS
34F0 or CSS 34F1 series can replace the safety-monitoring module.
Therefore, they can only be used as first sensor of a series-wired sen-
sor chain (refer to operating instructions CSS 34F0 / CSS 34F1).

3
CSS 34F0
CSS 34F1
Operating instructions
Safety sensor
EN
The user must evaluate and design the safety chain in accord-
ance with the relevant standards and the required safety level.
If multiple safety sensors are involved in the same safety
function, the PFH values of the individual components must be
added.
The entire concept of the control system, in which the safety
component is integrated, must be validated to the relevant
standards.
2.5 Technical data
Standards: IEC 60947-5-3; ISO 13849-1;
IEC 61508 , IEC 62061
Enclosure: glass-fibre reinforced thermoplastic
Operating principle: inductive
Coding levels according to ISO 14119: low
Actuator and switch distances
(according to IEC 60947-5-3): see table "Actuator / Switch distances“
Series wiring: max. 31 device, CSS 34F. as first
sensor and evaluation replacement
Cable length: max. 200 m
Hysteresis: max: 1.5 mm
Repeat accuracy R: < 0.5 mm
Switching frequency f: 3 Hz
Connector: M12, 8-pin in casing
Temperature resistance of the cable:
- at rest: −30 °C … +105 °C
- in motion: −10 °C … +105 °C
Ambient conditions:
Ambient temperature Tu:
- Output current ≤ 0.1 A / Output –25 °C to 70 °C
- Output current ≤ 0.25 A / Output –25 °C to +65 °C
Storage and transport temperature: –25 °C … +85 ºC
Resistance to vibration: 10 … 55 Hz, amplitude 1 mm
Resistance to shock: 30 g / 11 ms
Protection class: IP65, IP67 to IEC 60529
Electrical data:
Rated operating voltage Ue: 24 VDC -15% / +10%
(stabilised PELV)
Rated operating current Ie:0.6 A
Required rated short-circuit current: 100 A
Fuse (line protection): note the wire
diameter of continuing wire:
- for wire variants :up to 45 °C ambient temperature: 4.0 A
up to 60 °C ambient temperature: 3.15 A
up to 65 °C ambient temperature: 2.5 A
up to 70 °C ambient temperature: 2.0 A
- for plug version :2.0 A
Rated insulation voltage Ui:32 VDC
Rated impulse withstand voltage Uimp:800 V
No-load current Io:0.1 A
Response time: < 30 ms
Duration of risk: < 60 ms
Protection class: II
Overvoltage category: III
Degree of pollution: 3
EMC rating: according to IEC 60947-5-3
Electromagnetic interference: according to IEC 60947-5-3
Safety outputs Y1/Y2: normally open function, 2 channel,
p-type, short-circuit proof
Voltage drop: < 1 V
Rated operating voltage Ue1:min. Ue- 1 V
Leakage current Ir:< 0.5 mA
Rated operating current Ie1:max. 0.25 A, dependent
on ambient temperature
Minimum operating current Im:0.5 mA
Utilisation category: DC-12, DC-13
Rated operating voltage/current Ue1/Ie1:24 VDC / 0.25 A
Diagnostic output: short-circuit proof, p-type
Voltage drop: < 5 V
Rated operating voltage Ue2:min. (Ue– 5 V)
Operating current Ie2:max. 0,05 A
Utilisation category: DC-12, DC-13
Rated operating voltage/current Ue2/Ie2:24 VDC / 0.05 A
Wiring capacitance for serial diagnostics: max. 50 nF
2.6 Safety classification
Standards: ISO 13849-1, IEC 61508, IEC 62061
PL: e
Control Category: 4
PFH value: 3.6 x 10-9 / h
SIL: suitable for SIL 3 applications
Service life: 20 years
3. Mounting
3.1 General mounting instructions
During fitting, the requirements of ISO 14119 must be ob-
served.
The component can be mounted in any position. The active surface
of the safety sensor and the actuator has to be opposite. The sensor
enclosure must not be used as an end stop. The active surface of the
safety sensor is either the lateral surface marked with the type plate or
the front, rounded surface. The safety sensor must only be used within
the assured switching distances ≤ sao and ≥ sar.
The safety sensor and the CST 34-.-1 or CST 34-S-2 actuators are
supplied with integrated mounting plate. With the slotted holes of the
mounting plates, possible tolerances can be horizontally and vertically
compensated. The components are fitted with M4 screws.
The safety sensors and the actuators can be clipped onto the mounting
plate with different actuating directions. Both components are fixed by
means of a locking cap.
Safety sensor and actuator must be permanently fitted to
the safety guards and protected against displacement by
suitable measures (tamperproof screws, gluing, drilling of
the screw heads).
The mounting plates must be pinned after their fixation. The
mounting brackets also must be secured by means of the
supplied locking pin to protect them against tampering. The
CST-S-3 and CST 180 actuators must be protected by tam-
per-proof screws or a tamper-proof fitting.
At an ambient temperature of over 55°C, the safety sensor
must be fitted so that it is protected against unintentional
contact with persons.
In order to prevent confusion with the CSS 34 without relay
feedback, a functional test (refer to page 5) must be executed
after the electrical wiring.
To avoid any interference inherent to this kind of system and any reduc-
tion of the switching distances, please observe the following guidelines:
Minimum distance between two sensors: 100 mm

4
Operating instructions
Safety sensor
CSS 34F0
CSS 34F1
EN
3.2 Dimensions
All measurements in mm.
Safety sensor size
27
97,2
35
108,2
M 12x1
Dimensions Actuator
2735
97,2
101,7
Alternative suitable actuators with different design: refer
to www.schmersal.net.
Integrated mounting plate
35
8
27
101,7
42,5
4,5
50
R4,6
R2,1
¤5
Holes to be pinned Hole for the pin
3.3 Actuating positions of the safety sensor with regard to the
actuator
Lateral actuation Actuation from front
CST 34-S-1
CSS ..-34-S
CST 34-V-1CSS ..-34-V
CST 34-S-3
CSS ..-34-S
CSS ..-34-V CST 34-S-3
CST 34-S-2
CSS ..-34-S
CSS ..-34-V CST 34-S-2
CST 180-1/-2
CSS ..-34-S
CSS ..-34-V CST 180-1/-2
3.4 Switching distance
Actuators and switching distances (to EN 60947-5-3)
Actuator Sensor CSS ..-34-S
(Actuation from side)
CSS ..-34-V
(Actuation from front)
CST 34-V-1 sn
sao
sar
10 mm
8 mm
13 mm
12 mm
10 mm
15 mm
CST 34-S-1
CST 34-S-3
sn
sao
sar
14 mm
12 mm
17 mm
15 mm
13 mm
18 mm
CST 34-S-2
(increased
misalignment)
sn
sao
sar
14 mm
12 mm
17 mm
10 mm
8 mm
16 mm
CST 180-1
CST 180-2
sn
sao
sar
10 mm
8 mm
13 mm
12 mm
10 mm
16 mm
Key
SnRated operating distance
Sao Assured switching distance
Sar Assured switch-off distance

5
CSS 34F0
CSS 34F1
Operating instructions
Safety sensor
EN
Maximum misalignment from side
Y
X
Actuation from side
The long side allows for a maximum height misalignment (x) of sensor
and actuator of 36 mm (e.g. mounting tolerance or due to guard door
sagging). Increased misalignment, max. 53 mm, possible when the
CST 34-S-2 actuator is used. The axial misalignment (y) is max. ± 10
mm.
Maximum misalignment from front
Z
Actuation from front
The front face allows for an axial misalignment (z) of max. ± 8 mm.
3.5 Adjustment
The distance between the sensor and the actuator must be set to <
sao. If variations in the clearance between the sensor and the actuator
must be detected (e.g. sagging of a safety guard), this distance must be
reduced by 4 mm. The yellow LED’s and the diagnostic output indicate
the different ranges.
4. Electrical connection
4.1 General information for electrical connection
The electrical connection may only be carried out by autho-
rised personnel in a de-energised condition.
The power supply for the safety sensors must provide protection
against permanent overvoltage. Under fault conditions, the voltage
must not exceed 60 V. The use of PELV supply units is recommended.
If a safety chain including multiple sensors is set up, only the first
device of this chain may be a CSS 34F. type sensor. All other devices of
the chain must be of the default CSS 34 type. The CSS 34F. performs
the check of the connected contactors or relays and the optional button
for the entire chain.
Requirements for the connected safety switchgear
Dual-channel safety input, suitable for p-type safety sensors with NO
function. The safety sensors cyclically switch off the output to test them.
The switch-off times of max. 500 μs must be tolerated by the switching
device. An extension with short-circuit recognition for the evaluation is
not required. Note on the total length of a safety sensor chain, refer to
paragraph "Series-wiring". The maximum load current of 250 mA per
safety channel must be observed. Contactors with higher load currents
must be controlled by intermediate control relays.
Information for the selection of suitable safety-monitoring
modules can be found in the Schmersal catalogues or in the
online catalogue on the Internet: www.schmersal.net.
If the safety sensor is connected to electronic safety-monito-
ring modules, we recommend that you set a discrepancy time
of 100 ms. The safety inputs of the safety-monitoring module
must be able blanking a test impulse of approx. 1 ms. The
safety-monitoring module does not need to have a cross-wire
short monitoring function, if necessary, the cross-wire short
monitoring function must be disabled.
Wiring capacitance for serial diagnostics
The connecting cable of the safety sensor must have a maximum
length of 200 m; its wiring capacitance must not exceed 50 nF. De-
pending on the strand structure, normal unshielded 200 m long control
cables LIYY 0.25 mm² to 1.5 mm² have a wiring capacitance of approx.
20 … 48n F
The self-monitoring safety sensors of the CSS 34F0 or CSS 34F1
series can replace the safety-monitoring module. Therefore, they can
only be used as first sensor of a series-wired sensor chain (refer to
operating instructions CSS 34F0 / CSS 34F1).
The safety outputs can be integrated into the safety circuit of the control
system. For applications of PL e / control category 4 to EN ISO 13849-
1, the safety outputs of the safety sensor or of the sensor chain must be
wired to a safety monitoring-module of the same control category.
4.2 Series-wiring
Max. 31 sensors can be wired in series. The self-monitoring safety sen-
sors of the CSS 34F0 or CSS 34F1 series can replace the safety-mon-
itoring module. Therefore, they can only be used as first sensor of a
series-wired sensor chain.
A 200 m long sensor chain can be set up. Please note that voltage
losses could occur (due to cable length, cable section, voltage drop/
sensor)! For longer cable lengths, the section of the connecting cables
must be taken as large as possible.
Wiring examples for series-wiring, refer to appendix
Protection is not required when pilot wires are laid. The cables however
must be separated from the supply and energy cables. The max. fuse
rate for a sensor chain depends on the section of the connecting cable
of the sensor.
When wiring SD devices, please observe the voltage drop on
the cables and the current carrying capacity of the individual
components.

6
Operating instructions
Safety sensor
CSS 34F0
CSS 34F1
EN
5. Set-up and maintenance
5.1 Functional testing
The safety function of the safety components must be tested. The
following conditions must be previously checked and met:
1. Fitting of the sensor and the actuator
2. Fitting and integrity of the power cable
3. The system is free of dirt and soiling (in particular metal chips)
Functional test after assembly and connection of the CSS 34F.
All safety guards must be closed prior to the start of the functional test.
The feedback circuit must be opened, the button must not be actuated2).
No. Action to test the
operation
Reaction CSS 34
F0 version
Reaction CSS 34
F1 version
1 Switch on the opera-
ting voltage
The yellow LED
flashes at 5 Hz
and the relays are
disabled.
The yellow LED
flashes at 5 Hz
and the relays are
disabled.
2 Close the feedback
circuit: actuate the
connected button 3)
The yellow LED
is on + both con-
nected relays are
enabled
No change com-
pared to 1
3 Only version F1: reset
button actuation
No change com-
pared to 2
The yellow LED
is on + both con-
nected relays are
enabled
2) If no button is used, the feedback circuit must be opened by loosening the cable. To
that effect, the voltage must be switched off.
3) If no button is used, the feedback circuit must be closed by is reconnecting the cable.
To that effect, the voltage must be switched off.
5.2 Maintenance
In the case of correct installation and adequate use, the safety sensor
features maintenance-free functionality.
A regular visual inspection and functional test, including the following
steps, is recommended:
• Check the fitting of the sensor and the actuator
• Remove possible metal chips
• Check the cable for damage.
Measures must be taken to protect against manipulation or
against the bypassing of safety device, for example, using an
extra actuator.
Damaged or defective components must be replaced.
6. Diagnostic functions
6.1 Operating principle of the diagnostic LED's
The safety sensor indicates the operating condition and faults by means
of three-colour LED's located in the lateral surfaces of the sensor.
The green LED indicates that the safety sensor is ready for operation.
The supply voltage is on. The yellow LED's signal the detection of an
actuator. If the actuator is operating near the limit of the hysteresis
range of the safety sensor, the LED is flashing.
The flashing can be used to prematurely detect variations in the clear-
ance between the sensor and the actuator (e.g. sagging of a safety
guard). The sensor must be adjusted before the distance to the actuator
increases and before the safety outputs are disabled, thus stopping the
machine. The yellow LED flashing at 5 Hz signals that the sensor is
actuated but that the feedback circuit however is still open. If a fault is
detected, the red LED's will flash.
Flash codes red diagnostic LED
LED indication (red) Error cause
1 flash
pulse
Error output Y1
2 flash
pulses
Error output Y2
3 flash
pulses
Cross-wire Y1/Y2
4 flash
pulses
ambient temperature too high
5 flash
pulses
Wrong or defective actuator
Continuous
red
Internal error
6.2 Operating principle of the electronic diagnostic output
The short-circuit proof diagnostic output OUT can be used for cen-
tral visualisation or control functions, e.g. in a PLC. It indicates the
switching condition as shown in the table. The diagnostic output can
also be used to detect clearance variations between the sensor and
the actuator in the same way as the yellow LED. An active fault causes
the diagnostic output to be disabled. The safety outputs are disabled
after max. 30 minutes if the fault is not rectified. The signal combination,
diagnostic output disabled and safety channels still enabled, can be
used to stop the production process in a controlled manner. The inverse
signal combination, diagnostic output enabled and safety outputs dis-
abled, can be used to enable the internal safety-monitoring module by
means of a reset/enabling signal.
Table 1: Examples of the diagnostic function of the safety-sensor with conventional diagnostic output
Sensor function LED
Green Red Yellow
Diagnos-
tic output
Safety
outputs
Note
I. Supply voltage On Off Off 0 V 0 V Voltage on,
no evaluation of the voltage quality
II. Actuated On Off On 24 V 24 V The yellow LED always signals the presence of an
actuator within range
III. Actuated, actuator in limit
area
On Off Flashes
(1Hz)
24 V
pulsed
24 V The sensor must be adjusted before the distance to the
actuator increases and before the safety outputs are
disabled, thus stopping the machine
IV. Actuated and feedback
circuit open
On Off Flashes
(5Hz)
24 V 0 V The sensor waits for a signal at the feedback circuit:
F0: Closing of the feedback circuit
F1: Trailing edge at feedback circuit
V. Actuated in limit area and
feedback circuit open
On Off flashes
alternating
(1Hz / 5Hz)
24 V
pulsed
0 V LED indication combines the sensor functions III. and IV.
VI. Error warning, sensor
actuated
On Flashes On 0 V 24 V After 30 minutes if the error is not rectified
VII. Error On Flashes On 0 V 0 V Refer to table with flash codes

7
CSS 34F0
CSS 34F1
Operating instructions
Safety sensor
EN
6.3 Safety-sensors with serial diagnostic function
Safety sensors with serial diagnostic cable have a serial input and out-
put cable instead of the conventional diagnostic output. If CSS sensors
are daisy-chained, the diagnostic data are transmitted through the
series-wiring of the inputs and outputs.
Max. 30 CSS 34 sensors can be wired in series with one CSS 34 F0/
F1. For the evaluation of the serial diagnostics line either the PROFI-
BUS-Gateway SD-I-DP-V0-2 or the Universal-Gateway SD-I-U-... are
used. The PROFIBUS-Gateway is integrated as slave in an available
PROFIBUS DP system.
Accessories SD interface
For ease of wiring and series-wiring of SD devices, consi-
derable accessories are available. Detailed information is
available on the Internet, www.schmersal.net.
In this way the diagnostic signals can be evaluated with a PLC. The fol-
lowing operational information is automatically and permanently written
in an input byte of the PLC for each CSS 34 sensor of the series-wired
chain:
Bit 0: safety outputs enabled
Bit 1: safety sensor actuated, actuator identified
Bit 3: feedback circuit open or button not actuated
Bit 4: both safety inputs live
Bit 5: safety sensor actuated in hysteresis area
Bit 6: error warning, switch-off delay activated
Bit 7: error, safety outputs switched off
In the event of a communication error between the field bus Gateway
and the safety sensor, the switching condition of the safety output of the
safety sensor is maintained.
Detailed information regarding the use of serial diagnostics can be
found in the operating instructions manuals of the FIELDBUS Gateway
as well as in the Online Catalogue on the Internet, check out: www.
schmersal.net.
Wiring capacitance for serial diagnostics
The connecting cable of the safety sensor must have a maximum length
of 200 m; its wiring capacitance must not exceed 50 nF. Depending on
the strand structure, normal unshielded 200 m long LIYY cables with a
section of 0,5 mm² to 1,5 mm² have a wiring capacitance of approx. 20 -
48 nF.
When wiring SD devices, please observe the voltage drop on
the cables and the current carrying capacity of the individual
components.
Fault
A fault has occurred, which causes the safety outputs to be disabled.
The fault is reset, when the cause is eliminated and bit 7 of the request
byte changes from 1 to 0 or the safety guard is opened. Faults at the
safety outputs are only deleted upon the next release, as the fault recti-
fication cannot be detected sooner.
Error warning
A fault has occurred, which causes the safety outputs to be disabled af-
ter 30 minutes. The safety outputs initially remain enabled. This enables
the shutdown of the process in a controlled manner. An error warning is
deleted when the cause of error is eliminated.
Table 2: Function of the visual diagnostic LED`s, the serial status signals and the safety outputs by means of an example
System condition LED Safety outputs serial diagnostic byte bit no.
green red yellow Y1, Y2 76543210
Supply voltage on, not actuated On Off Off 0V 00000000
Actuated, feedback circuit open /
not actuated
On Off Flashes
(5Hz)
0V 00011010
Actuated,
safety outputs enabled
On Off On 24 V 0 0 0 1 0 0 1 1
Actuated in limit area On Off Flashes
(1Hz)
24 V 0 0 1 1 0 0 1 1
Actuated, warning On On/flashes On 24 V 0 1 0 1 0 0 1 1
Actuated, fault On On/flashes On 0 V 1 1 0 1 0 1 1 0
The shown bit order of the diagnostic byte is an example. A different combination of the operational conditions will lead to a change of the bit order.
Table 3: I/O data and diagnostic data
Communication directions: Request byte: from the PLC to the local safety sensor
Response byte: from the local safety sensor to the PLC
Warning/error byte: from the local safety sensor to the PLC
Bit n° Request byte Response byte Diagnostic
error warning
Diagnostic
error
Bit 0: Error reset Safety output activated Error output Y1 Error output Y1
Bit 1: --- Actuator detected Error output Y2 Error output Y2
Bit 2: --- --- Cross-wire short Cross-wire short
Bit 3: --- Start function missing / feedback circuit open Temperature too high Temperature too high
Bit 4: --- Input condition X1 and X2 --- Actuator fault, coding error
Bit 5: --- Actuated in limit area Internal device error Internal device error
Bit 6: --- Error warning Communication error between the field
bus Gateway and the safety switch
---
Bit 7: Error reset Error (enabling path switched off) Operating voltage too low ---
The described condition is reached, when Bit = 1

8
Operating instructions
Safety sensor
CSS 34F0
CSS 34F1
EN
7. Disassembly and disposal
7.1 Disassembly
The safety switchgear must be disassembled in a de-energised condi-
tion only.
7.2 Disposal
The safety switchgear must be disposed of in an appropriate manner in
accordance with the national prescriptions and legislations.
8. Appendix
8.1 Wiring examples
The application examples shown are suggestions. They however do not
release the user from carefully checking whether the switchgear and its
set-up are suitable for the individual application.
The components in the load circuit must be dimensioned so
that a "short-circuit" does not cause a welding of the "NO
contacts" of K1 and K2.

9
CSS 34F0
CSS 34F1
Operating instructions
Safety sensor
EN
Wiring example 1
Wiring example 1: Series-wiring of the safety sensor CSS 34F0 with diagnostic output
The CSS 34 F0 safety sensor directly controls auxiliary contactors1) or relays1). The monitoring of the external contactors or relays is enabled by
the feedback circuit, which is built by the NC contacts of K1, K2. As no further button is used, the auxiliary contactors1) or relays1) are immediately
enabled when the safety guard is closed.
The feedback circuit can be extended by an enabling button. The sensor is switched on, as soon as the button is pushed. The set-up is shown on
the following wiring example of the CSS 34F1. The internal safety-monitoring module of variant F0 is not equipped with an edge detection for the
button. If required, a "manual reset" to ISO 13849-1 must be realised by other components of a local control system.
In this example, the CSS 34 F0 safety sensor is connected as individual device. To that effect, the safety inputs are connected to 24 VDC.
24 V
0V
WH
VT GY
RD
BK
0V
BN
BU
CST 34-S-1
CSS 14-34F0-S-D-M-L
K1
K2
K1 K2
K2
K1
Feedback
circuit
Wiring, refer to table 4
Load
Field
Control cabinet
Wiring example 2
Wiring example for a series-wiring of the CSS 34 and CSS 34F1 safety sensors with conventional diagnostic outputs
The safety sensor directly controls auxiliary contactors 1) or relays 1). The internal safety monitoring module of the CSS 34F1 variant monitors in addition
to the feedback contacts a trailing edge of the reset button. The sensor switches on when the button is released. It can be used for manual reset on
safety guards, which can be stepped over. The protected area must be designed so that a single reset button suffices.
24 V
0V
WH
VT
WH
VT
GY
RD
BK
0V 0V
BN
BU
BN
BU
GY
RD
BK
CST 34-S-1
CSS 14-34-S-D-M-L
CST 34-S-1
CSS 14-34F1-S-D-M-L
K1
K2
K1 K2
K1 K2
J
Feedback circuit
reset button
Wiring, refer to table 4
Load
Field
Control cabinet max. 31 components in
series
n-participants

10
Operating instructions
Safety sensor
CSS 34F0
CSS 34F1
EN
Wiring example 3
Wiring example for a series-wiring of the CSS 34 and CSS 34F1 safety sensors with serial diagnostic outputs
The CSS 34 F1 safety sensor directly controls auxiliary contactors 1) or relays 1). The internal safety monitoring module of the CSS 34F1 variant mon-
itors in addition to the feedback contacts a trailing edge of the reset button. The sensor switches on when the button is released. It can be used for
manual reset on safety guards, which can be stepped over. The protected area must be designed so that a single reset button suffices. The Fieldbus
Gateway is connected to the serial diagnostic input of the first sensor.
24 V
0V
WH
VT
WH
VT
PK
RD
BK
BN
BU
BN
BU
PK
RD
BK
GY GY
SD-i-DP
CST 34-S-1
CSS 14-34-S-SD-M-L
CST 34-S-1
CSS 14-34F1-S-D-M-L
K1
K2
K1 K2
K1 K2
J
Feedback circuit
reset button
Wiring, refer to table 4
Load
Field bus
Field
Control cabinet max. 31 components in series
n-participants
Wiring example 4
Wiring example of the CSS 34F0 safety sensor with conventional diagnostic output wired with auxiliary relays for controlling auxiliary
contactors 1) with actuating currents > 250 mA
Additional auxiliary relays are used, when the power of the safety outputs of the safety sensor is insufficient to directly control the auxiliary contactors
1). The NO contacts of the load-switching auxiliary contactors 1) are monitored.
Optional executions of the feedback circuit with one button, refer to previous wiring examples.
24 V
0V
WH
VT GY
RD
BK
0V
BN
BU
CST 34-S-1
CSS 14-34F0-S-D-M-L
L1 L1 L2 L3
K1
K2
positive-guided auxiliary contactors Load
Load on/off
Field
Control cabinet
Relay
Wiring, refer to table 4

11
CSS 34F0
CSS 34F1
Operating instructions
Safety sensor
EN
8.2 Connection example
Schedule 4: Wiring of the safety sensor with cable or integrated connector
Function safety switchgear Pin configuration of
the integrated connector
Colour code of the
Schmersal connector or
the integrated cable
possible colour codes of
other conventional connectors
with conventional
diagnostic output
with serial diagnostic
function
to
IEC 60947-5-2: 2008
to DIN 47100
A1 Ue1 BN BN WH
X1 Safety input 1 2 WH WH BN
A2 GND 3 BU BU GN
Y1 Safety output 1 4 BK BK YE
OUT Diagnostic output SD output 5 GY GY GY
X2 Safety input 2 6 VT PK PK
Y2 Safety output 2 7 RD VT BU
IN without function SD input 8 PK OR / shielded RD
5
8
4
3
21
7
6
5
8
4
3
2
1
7
6
Connecting cables with coupling (female)
IP67, M12, 8-pole - 8 x 0.23 mm²
Cable length 2.5 m 101209963
Cable length 5 m 101209964
Cable length 10 m 101209960
IP69K, M12, 8-pole - 8 x 0.21 mm²
Cable length 5 m 101210560
Cable length 5 m, angled 101210561

12
Operating instructions
Safety sensor
CSS 34F0
CSS 34F1
EN
CSS34F-C-EN
9. Declaration of conformity
The currently valid declaration of conformity can be down-
loaded from the internet at www.schmersal.net.
9.1 EC Declaration of conformity
Name of the safety component: CSS 34F0
CSS 34F1
Type: Refer to ordering code
Description of the safety component: Non-contact safety sensor
Relevant EC-Directives: 2006/42/EC EC-Machinery Directive
2004/108/EC EMC-Directive
Person authorised for the compilation
of the technical documentation:
Oliver Wacker
Möddinghofe 30
42279 Wuppertal
Notied body, which approved the full
quality assurance system, referred to in
Appendix X, 2006/42/EC:
TÜV Rheinland Industrie Service GmbH
Alboinstr. 56
12103 Berlin
ID n°: 0035
K.A. Schmersal GmbH & Co. KG
Möddinghofe 30, D - 42279 Wuppertal
Postfach 24 02 63, D - 42232 Wuppertal
Phone: +49 - (0)2 02 - 64 74 - 0
Telefax: +49 - (0)2 02 - 64 74 - 1 00
E-Mail: [email protected]
Internet: http://www.schmersal.com
Place and date of issue: Wuppertal, March 10, 2015
Authorised signature
Philip Schmersal
Managing Director
EC Declaration of conformity
Translation of the original
Declaration of Conformity
K.A. Schmersal GmbH & Co. KG
Möddinghofe 30
42279 Wuppertal
Germany
Internet: www.schmersal.com
We hereby certify that the hereafter described safety components both in its basic design and construc-
tion conform to the applicable European Directives.