BERNSTEIN SEU-1/0-T45 Series User manual

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T-Adapter.indd 1T-Adapter.indd 1 09.09.2021 14:31:1409.09.2021 14:31:14
We make
safety happen.
SMART T-Connector with DCD
SEU-1/0-T45 Series

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SMART T-Connector with DCD SEU-1/0-T45 Series
Contents
1 Product Overview 3
1.1 Models 3
1.2 Important... Read this before proceeding! 3
1.3 Overview 3
2 Installation Instructions 4
2.1 Mechanical Installation 4
2.2 Installation Requirements 5
2.3 Protective (Safety) Stop Circuits 5
2.4 Output Signal Switching Devices (OSSDs) and External Device Monitoring (EDM) 6
2.4.1 Fault Tolerant Output Feature 6
2.5 Wiring 7
2.5.1 Wire the SEU-1/0-T45-... in a Chain of DCD E-Stops 8
2.5.2 Wire the SEU-1/0-T45-... in a Chain of DCD Interlocks 9
2.6 Checkout 11
2.7 Daisy Chain diagnostic (DCD) Information 12
2.8 Information Available Using Daisy Chain Diagnostic (DCD) 12
3 Specications 13
3.1 Dimensions 14
5 Product Support and Maintenance 15
5.1 Maintenance and Service 15
5.2 Status Indicators 15
5.3 BERNSTEIN AG Limited Warranty 16
5.4 EU Declaration of Conformity (DoC) 17

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SMART T-Connector with DCD SEU-1/0-T45 Series
1 Product Overview
• Connects conventional emergency stop buttons or safe mechanical switch contacts
to an DCD chain of devices
• Rugged design; easy installation with no assembly or individual wiring required
• 4 or 5-pin M12 female quick disconnect to connect an input device
• Daisy Chain diagnostic (DCD) for health and status information when used with a
compatible BERNSTEIN Safety Controller or a DCD diagnostic module
• Built-in indication for input device status
• Built-in indication for DCD Status
1.2 Important... Read this before proceeding!
The user is responsible for satisfying all local, state, and national laws, rules, codes, and regulations relating to the use of
this product and its application. BERNSTEIN has made every effort to provide complete application, installation, ope-
ration, and maintenance instructions. Please contact BERNSTEIN Technical Support with any questions regarding this
product.
The user is responsible for making sure that all machine operators, maintenance personnel, electricians, and supervisors
are thoroughly familiar with and understand all instructions regarding the installation, maintenance, and use of this
product, and with the machinery it controls. The user and any personnel involved with the installation and use of this
product must be thoroughly familiar with all applicable standards, some of which are listed within the specifications.
BERNSTEIN AG makes no claim regarding a specific recommendation of any organization, the accuracy or effectiveness
of any information provided, or the appropriateness of the provided information for a specific application.
1.1 Models
1.3 Overview
The SEU-1/0-T45-... is an adapter unit to integrate and serially connect Electromechanical Safety Switches (EMSSs)
without DCD into machine designs.
This connector can be used to connect a safety point on a machine that is not suitable for an existing DCD device, such
as a panel mount e-stop or mechanical interlocks on a door. The SEU-1/0-T45-... interfaces with devices that have two
normally closed (NC) safety contacts.
The indicators on the SEU-1/0-T45-... provide local diagnostics. One LED provides the status of the input device. The
other LED provides the status of the OSSD inputs (DCD chain).
WARNING:
• Not a safeguarding device
• Failure to follow these instructions could result in serious injury or death.
• This device is not considered a safeguarding device because it requires an overt action by an individual to
stop machine motion or hazards. A safeguarding device limits or eliminates an individual‘s exposure to a
hazard without action by the individual or others. This device cannot be substituted for required safegu-
arding. Refer to the applicable standards to determine those requirements.
Wire contact: NC 1 to CH1a and CH1b and
NC 2 to CH2a and CH2b
Part Number Description local Reset Input Device Connector
Pin 1 Pin 2 Pin 3 Pin 4 Pin 5 Indication
6075689190 SEU-1/0-T45-C No CH1a CH1b CH2a CH2b NC Green / Red
6075689191 SEU-1/0-T45-C-X-AB No CH1a CH1b NC CH2a CH2b Green / Red

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SMART T-Connector with DCD SEU-1/0-T45 Series
Important:
It is the responsibility of the machine builder (user) to ensure the SEU-1/0-T45-... series wiring/cabling is
not easily manipulated by an operator to defeat the safety function(s), for example, ensure the operator
cannot remove a device from the chain.
2 Installation Instructions
2.1 Mechanical Installation
Install the SEU-1/0-T45-... to allow access for functional checks, maintenance, and service or replacement. Do not install
the SEU-1/0-T45-... in such a way to allow for intentional defeat.
All mounting hardware is supplied by the user. Fasteners must be of sufficient strength to guard against breakage. Use
of permanent fasteners or locking hardware is recommended to prevent the loosening or displacement of the device.
The mounting hole (4.5 mm) in the SEU-1/0-T45-... accepts M4 hardware. See the figure below to help in determining the
minimum screw length.

CAUTION:
Tighten the fastening screw of the SEU-1/0-T45... during installation to a maximum torque of 0.56 Nm (5 in-
lbs). Overtightening can aect the performance of the SEU-1/0-T45....

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SMART T-Connector with DCD SEU-1/0-T45 Series
1)A person who, by possession of a recognized degree or certificate of professional training, or who, by extensive know-
ledge, training and experience, has successfully demonstrated the ability to solve problems relating to the subject
matter and work.
2.3 Protective (Safety) Stop Circuits
A protective (safety) stop allows for an orderly cessation of motion for safeguarding purposes, which results in a stop of
motion and removal of power from the Machine Primary Control Elements (MPCE) (assuming this does not create ad-
ditional hazards).
A protective stop circuit typically comprises a minimum of two normally open contacts from forced-guided, mechani-
cally linked relays, which are monitored through External Device Monitoring (EDM) to detect certain failures, to prevent
the loss of the safety function. Such a circuit can be described as a „safe switching point“.
Protective stop circuits are either single channel, which is a series connection of at least two normally open contacts,
or dual- channel, which is a separate connection of two normally open contacts. In either method, the safety function
relies on the use of redundant contacts to control a single hazard. If one contact fails On, the second contact arrests the
hazards and prevents the next cycle from occurring.
Interface the protective stop circuits so that the safety function cannot be suspended, overridden, or defeated, unless
accomplished in a manner of the same or greater degree of safety as the machine‘s safety related control system that
includes the SEU-1/0-T45-....
A DCD compatible BERNSTEIN Safety Controller, such as the SCR P or SCR DI, provides a series connection of redundant
contacts that form protective stop circuits for use in either single-channel or dual-channel control.
2.2 Installation Requirements
The device is intended for indoor use only and must not be affected by environmental conditions. Install the device so
that operation is not impeded, but protected against inadvertent operation (for example, accidental actuation by being
bumped or leaned against). Do not operate the switch using a tool. Do not expose the switch to excessive shocks and
vibrations, otherwise the switch may be deformed or damaged, causing malfunction or operation failure.
Electrical installation must be made by qualified personnel 1) and must comply with IEC/EN 60204-1, ANSI/NFPA 79 or
NEC (National Electrical Code), and all applicable local standards. It is not possible to give exact wiring instructions for a
device that interfaces to a multitude of machine control configurations. The following is general in nature; it is recom-
mended to perform a risk assessment to ensure appropriate application, interfacing/connection, and risk reduction (see
ISO 12100 or ANSI B11.0).
WARNING:
• Risk of electric shock
• Use extreme caution to avoid electrical shock. Serious injury or death could result.
• Always disconnect power from the safety system (for example, device, module, interfacing, etc.), guarded
machine, and/or the machine being controlled before making any connections or replacing any compo-
nent. Lockout/tagout procedures might be required. Refer to OSHA 29CFR1910.147, ANSI Z244-1, or the
applicable standard for controlling hazardous energy.
• Make no more connections to the device or system than are described in this manual. Electrical instal-
lation and wiring must be made by a Qualified Person and must comply with the applicable electrical
standards and wiring codes, such as the IEC 60204-1, ANSI NFPA79, or NEC (National Electrical Code), and
all applicable local standards and codes.

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SMART T-Connector with DCD SEU-1/0-T45 Series
Important:
• The SEU-1/0-T45-... does not have external device monitoring (EDM).
• If EDM is required for the application, it must be implemented in the external control.

WARNING:
• Interfacing both output signal switching devices (OSSD)
• Failure to follow these instructions could result in serious injury or death.
• Unless the same degree of safety is maintained, never wire an intermediate device(s) (PLC, PES, PC) between the safety module outputs
and the master stop control element it switches such that a failure causes a loss of the safety stop command or the failure allows the safety
function to besuspended, overridden,ordefeated.
• Connect both OSSD outputs to the machine control so that the machine’s safety-related control system interrupts the circuit to the machine
primary control element(s), resulting in a nonhazardous condition.
WARNING:
• Interfacing OSSD Outputs to Machine Inputs
• Failure to properly interface the OSSD Outputs to the guarded machine could result in serious injury or death.
• To ensure proper operation, the BERNSTEIN AG device output parameters and machine input parameters must be
considered when interfacing the BERNSTEIN AG device OSSD outputs to machine inputs. Design the machine cont-
rol circuitry so that the maximum load resistance value is not exceeded and the maximum specified OSSD Off-state
voltage does not result in an On condition.
External device monitoring (EDM) is a function used to monitor the state of the external, positively guided (mechanically
linked) machine control contacts (Final Switching Devives (FSD)). The SEU-1/0-T45-... series does not include the EDM
function. As a result, the SEU-1/0-T45-... should be used with an external safety monitoring device that monitors the
status of the two OSSDs and is capable of providing the EDM function.
Examples of appropriate external safety monitoring devices include the SCR Safety Controller.
2.4 Output Signal Switching Devices (OSSDs) and External Device Monitoring (EDM)
The SEU-1/0-T45-... is able to detect faults on OSSD1 and OSSD2. These faults include short circuits to +24 V DC and 0 V,
and between OSSD1 and OSSD2.
Both OSSD outputs must be connected to the machine control so that the machine‘s safety-related control system inter-
rupts the circuit or power to the machine primary control element(s) (MPCE), resulting in a non-hazardous condition.
Final switching devices (FSDs) typically accomplish this when the OSSDs go to an OFF state.
Refer to the output specifications and these warnings before making OSSD output connections and interfacing the
SEU-1/0-T45-... to the machine.
2.4.1 Fault Tolerant Output Feature
Faults that do not immediately compromise the safe operation of the SEU-1/0-T45-... (for example safety output to exter-
nal potential, crosswire short safety output) result in a delayed switch-off of the safety outputs.
The safety outputs switch off when the error warning exceeds 20 minutes. In case of error warning, the SEU-1/0-T45-...
will doubleflash red.
Use this fault-tolerant output feature to run down the machinery in a controlled manner. After fixing the fault, the error
message is confirmed by a voltage reset. The safe outputs enable and allow a restart.
Faults that directly affect the safe operation of the SEU-1/0-T45-... immediately cause a lockout condition and the OSSDs
turn off.

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SMART T-Connector with DCD SEU-1/0-T45 Series
2.5 Wiring
Figure 1. Wiring the SEU-1/0-T45-... to a panel mount Emergency Stop button
Figure 2. Wiring the SEU-1/0-T45-... to mechanical interlocks
SEU-1/0-T45-C with
SFW-M12C4/AW…
SEU-1/0-T45-AB with
SFW-M12B5/AW...
Pin 1 CH1a Brown CH1a Brown
Pin 2 CH1b White CH1b White
Pin 3 CH2a Blue NC Blue
Pin 4 CH2b Black CH2a Black
Pin 5 NC - CH2b Grey
SEU-1/0-T45-C with
SFW-M12C4/AW…
SEU-1/0-T45-AB with
SFW-M12B5/AW...
Pin 1 CH1a Brown CH1a Brown
Pin 2 CH1b White CH1b White
Pin 3 CH2a Blue NC Blue
Pin 4 CH2b Black CH2a Black
Pin 5 NC - CH2b Grey

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SMART T-Connector with DCD SEU-1/0-T45 Series
1. Connect the female 4-pin M12/Euro-Style cable to the male 4-pin M12/Euro-Style of the series connection T-Adapter
(ATS-M12/4-M12/8).
2. Connect your reset device.
• If you are using a manual reset model of emergency stop device—Connect the female 8-pin M12/Euro-Style of the
reset T-Adapter (ATD-M12/8-M12/4) to the male 8-pin M12/Euro-Style connector of the series connection T-Adapter.
• If you are using a reset switch—Connect a female 4-pin M12/Euro-Style cable to the male 4-pin M12/Euro-Style QD of
the reset T-Adapter.
3. Connect the SEU-2 / -3 / -4 to the male 8-pin M12 connector of the T-Adapter. Use the S1W-M12A8/BW... extension cables
as needed.
4. Connect the male 4-pin M12 end of a double-ended cable to the female 4-pin M12 of the T-Adapter. Connect the female
end of the double ended cable to the next series connection T-Adapter (ATS-M12/4-M12/8) or the SEU-1/0-T45-....
5. At the end of the line, install a terminating plug (AEP-M12/4) to properly truncate the system.
6. Wire the wired end of the 4-pin M12 cable (from step 1) directly to a Safety Monitoring Device, such as a DCD-enabled
BERNSTEIN Safety Controller model SCR P or SCR DI. You may also wire the 4-pin M12 cable to an Daisy Chain diagnostic
(DCD) module then to the Safety Monitoring device.
7. Verify that the DCD chain of devices and the safety monitoring device are powered from the same power supply or the
commons of the separate supplies are the same. Ensure that the voltage level at the DCD enabled device in position #1
(furthest from the power supply) is above 19.5 V for the system to operate properly.
2.5.1 Wire the SEU-1/0-T45-... in a Chain of DCD E-Stops
When connecting emergency stop units in series, simplify the wiring by using special T-Adapters, low cost unshielded
four-wire double-ended cables, and the SEU-1/0-T45-... with indication.
A configuration of three lighted DCD E-Stops and a panel mount E-Stop is shown. The SEU-3... and SEU-4... E-stops and
the SEU-1/0-T45-... can be combined in a single chain.
Figure 3. Wiring the SEU-1/0-T45-... in a chain of DCD e-stops
SEU-1/0-T45-C with
SFW-M12C4/AW…
SEU-1/0-T45-AB with
SFW-M12B5/AW...
Pin 1 CH1a Brown CH1a Brown
Pin 2 CH1b White CH1b White
Pin 3 CH2a Blue NC Blue
Pin 4 CH2b Black CH2a Black
Pin 5 NC - CH2b Grey
(see table below)

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SMART T-Connector with DCD SEU-1/0-T45 Series
Important:
The inputs to the SEU-1/0-T45-... must meet the three second maximum simultaneity requirement to
prevent faults.

1. Connect the female 4-pin M12/Euro-style cable to the male 4-pin M12/Euro-style of the series connection T-Adapter
(ATS-M12/4-M12/8).
2. Connect your reset device.
• If you are using a manual reset model of SRF switch—Connect the female 8-pin M12/Euro-style of the reset T-Adapter
(ATD-M12/8-M12/4) to the male 8-pin M12/Euro-style connector of the series connection T-Adapter.
• If you are using a reset switch—Connect a female 4-pin M12/Euro-style cable to the male 4-pin M12/Euro-style QD of
the reset T-Adapter.
3. Connect the interlock to the male 8-pin M12 connector of the T-Adapter. Use the S1W-M12A8/BW... extension cables as
needed.
4. Connect the male 4-pin M12 end of a double-ended cable to the female 4-pin M12 of the T-Adapter. Connect the female
end of the double ended cable to the next series connection T-Adapter (ATS-M12/4-M12/8) or the SEU-1/0-T45-....
5. At the end of the line, install a terminating plug (AEP-M12/4) to properly truncate the system.
6. Wire the wired end of the 4-pin M12 cable (from step 1) directly to a Safety Monitoring Device, such as an DCD-enabled
BERNSTEIN Safety Controller model SCR P or SCR DI. You may also wire the 4-pin M12 cable to an Daisy Chain diagnostic
(DCD) module then to the Safety Monitoring device.
7. Verify that the DCD chain of devices and the safety monitoring device are powered from the same power supply or the
commons of the separate supplies are the same. Ensure that the voltage level at the DCD enabled device in position #1
(furthest from the power supply) is above 19.5 V for the system to operate properly.
Figure 4.WiringtheSEU-1/0-T45-... ina chainofDCDinterlocks
2.5.2 Wire the SEU-1/0-T45-... in a Chain of DCD Interlocks
When connecting DCD interlocks in series, simplify the wiring using special T-Adapters, low cost unshielded four-wire dou-
ble- ended cables, and the SEU-1/0-T45-... with Indication.
A conguration of three SRF switches and an SEU-1/0-T45-... with two mechanical interlocks connected in shown below.
The SEU E-Stops and connection boxes, SRF switches, and the SEU-1/0-T45-... can be combined in a single chain.
SEU-1/0-T45-C with
SFW-M12C4/AW…
SEU-1/0-T45-AB with
SFW-M12B5/AW...
Pin 1 CH1a Brown CH1a Brown
Pin 2 CH1b White CH1b White
Pin 3 CH2a Blue NC Blue
Pin 4 CH2b Black CH2a Black
Pin 5 NC - CH2b Grey

(see table below)

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SMART T-Connector with DCD SEU-1/0-T45 Series
2.5.3 Wiring Additional Power Supplies
For guidance on maximum total cable length and maximum number of devices before an additional power supply may
be needed, see Figure 7 on p. 10. For using DCD information to monitor the individual device voltages, see Daisy Chain
diagnostic (DCD) Information on p. 11.
In a long series or series with many DCD devices, the voltage at all devices must stay above 19.5 V for proper operation.
An additional power supply may be required to maintain a minimum of 19.5 V at all devices. There are two options to
connect an additional power supply.
E-Stop with DCD
S1W-M12A8/BW...
ATS-M12/4-M12/8
S1W-M12C4/AW... ATS-M12/4-M12/8 AT S-M12/4-M12/8 AT S-M12/4-M12/8 AT S-M12/4-M12/8 SEU-1/0-T45-C SFW-M12C4/AW...
E-Stop with DCD
AT
D-M12/8-M12/4
AEP-M12/4
S1W-M12A8/BW...
ATS-M12/4-M12/8 S1W-M12C4/AW... ATS-M12/4-M12/8 AT S-M12/4-M12/8 AT S-M12/4-M12/8 ATS-M12/4-M12/8 SEU-1/0-T45-C SFW-M12C4/AW...
Note:
Option 1 can only be used in combination with ATS-M12/4-M12/8 connector (the ATD-M12/8-M12/4 can-
not be connected to an SEU-1/0-T45-...).

Figure 5. Option 1: Use a ATD-M12/8-M12/4 Connector in series with DCD Device. If available, set the power supplies for parallel output.
Figure 6. Option 2: Replace the terminator with a power supply. The OSSD1 and OSSD2 wires at power supply #2 must be connected to +24 V DC. If
available, set the power supplies for parallel output.

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SMART T-Connector with DCD SEU-1/0-T45 Series
2.6 Checkout
At machine set up, a Designated Person 2) should test each safety point for proper machine shutdown response. A
Designated Person should check the safety point for proper operation, physical damage, button looseness, and exces-
sive environmental contamination. This should take place on a periodic schedule determined by the user, based on the
severity of the operating environment and the frequency of switch actuations.
Adjust, repair, or replace components as needed. If inspection reveals contamination on the switch, thoroughly clean
the switch and eliminate the cause of the contamination. Replace the switch and/or appropriate components when any
parts or assemblies are damaged, broken, deformed, or badly worn; or if the electrical/mechanical specifications (for the
environment and operating conditions) have been exceeded.
Always test the control system for proper functioning under machine control conditions after performing maintenance,
replacing the safety point, or replacing any component of the device.
WARNING:
• Safety devices with OSSDs and without DCD, such as safety light curtains, are not compatible.
• Failure to follow these instructions could result in serious injury or death.
• Do not use safety devices with OSSDs and without DCD in a series connection of multiple DCD
• devices.
WARNING:
• Safety devices with solid-state OSSDs are not acceptable Input Devices
• Failure to follow these instructions could result in serious injury or death.
• Only use safety devices with two normally closed (NC) contacts as input devices to the SEU-1/0-T45-....
0
0
20
40
60
80
100
120
140
160
4812 16 20 24 28 32
Max. Total Series Cable (m)
Number of DCD Devices
Max. Total Series Cable (m)
Single Power Supply
SRF
SEU-3 / 4
Figure 7. Maximum total cable length for a single power supply
The SEU-1/0-T45-... has a similar current demand to the SRF sensors.
2)A Designated Person is identified in writing by the employer as being appropriately trained to perform a specified checkout procedure. A Quali-
fied Person possesses a recognized degree or certificate or has extensive knowledge, training, and experience to solve problems relating to the
emergency stop installation.

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SMART T-Connector with DCD SEU-1/0-T45 Series
2.7 Daisy Chain diagnostic (DCD) Information
The information transmitted via the Daisy Chain diagnostic (DCD) interface is not safety related. The diagnostic
technology allows a wide range of device information to be loaded into the machine control system.
To interpret this information, BERNSTEIN diagnostic modules are available, including the SRF-DI Diagnostic Mo-
dule and the SCR DI and SCR P Safety Controller. Refer to the instruction manuals for detailed information on the
diagnostic devices. By means of diagnostics, the following information can be transmitted, among others:
• Safety Device Status (on, off, or faulted)
• Under-voltages in the series connection (chain)
• Attempts to remove a device from the chain
At this time this information can be refined using the following interfaces:
• USB—Displays device information on the PC (requires using an SRF DI, SCR DI or SCR P)
• NFC Displays device information on a mobile phone (requires SRF DI or SCR DI, a mobile phone
and the BERNSTEIN DCD APP).
• IO-Link—Bus independent data reading into the control system (requires using the SRF DI or SCR DI and an IO-Link
master)
• Industrial Ethernet Protocols—Bus data reading into the control system (requires using the SCR P Safety Controller)
2.8 Information Available Using Daisy Chain Diagnostic (DCD)
A variety of information can be retrieved from the Emergency Stop devices via the DCD series connection and a
diagnostic unit or a safety controller with DCD interface.
A description of the information can be found under the following link:
https://www.bernstein.eu/fileadmin/downloads/schaltertechnik/Konstruktionsdaten/SRF/0800000857_en.pdf

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SMART T-Connector with DCD SEU-1/0-T45 Series
Important:
Interface the SEU-1/0-T45-... with Indication only to a SELV (Safety Extra-Low Voltage) for circuits without
earth ground or a PELV (Protected Extra-Low Voltage) for circuits with earth ground power supply accor-
ding to EN/IEC 60950.

3 Specications
Rated operational voltage (Ue)
24 VDC +15%, -20% (SELV/PELV power supply)
The external voltage supply must be capable of buering
brief mains interruptions of 20 ms, as specied in IEC/EN
60204-1.
Rated Conditional Short-Circuit Current
100 A
Rated Isolation Voltage (Ui)
75 VDC
No-Load Current
60 mA typical at 24 VDC
75 mA maximum at 19.2 VDC
Rated Impulse Withstand Voltage (Uimp)
500 V
Indication
Red (618 nm), Green (525 nm)
Housing/connectors
Housing: Polyvinyl Chloride (PVC), Black Connector Nuts:
Nickel plating on Cu/Zn allow
Vibration Resistance
Operating extremes: 10 Hz to 500 Hz, amplitude 0,35 mm,
acceleration 50 m/s2
Operating Conditions
–25 °C to +55 °C (–13 °F to +131 °F)
45% to 85% relative humidity (no condensation)
Environmental Ratings
For Indoor Use Only
IEC IP65, IEC IP67 (EN 60529)
Certifications
TÜV, CE, cULus
OSSD Outputs
Two solid state, p-switching, short circuit-proof
Voltage level: according to Type 3 EN 61131-2 Maximum
operating current: 30 mA
Leakage current: ≤ 1 mADC On-state voltage: ≥ Ue – 3 V
Protection: Sustained short circuit and overload protec-
tion; thermal / digital (clocking)
Test pulse duration: 70 us Test pulse rate: 1 s
Input Device Requirements
Accepts two normally closed (NC) contacts
Simultaneity Requirement
Three seconds
Power Up Delay
≤ 2 s
Response Time
40 ms maximum + (7 ms × number of following DCD
devices)
Maximum Cable Length Between DCD Devices
30 m
EMC
According to EN 61326-1 and EN 61326-3-1
Safety Data
SIL 3 (IEC 61508)
SILCL 3 (EN 62061)
Category 4, PL e (EN ISO 13849-1)
PFHD: 6.56 × 10-9 1/h according to EN 62061 Service Life:
20 years
ZVEI Interface Informations
The OSSD interface corresponds to Interface Type C Class 3 according to the ZVEI position paper CB24I Ed. 2.0.
Interface Type C Source (Table 4.32)
Parameter min. typ. max.
Test pulse duration ti70 µs
Test pulse rate T 1 s
Current rating IN-30 mA Output current IN
Capacitive loads - 50 nF Maximum capacitive load CL_max.
Inductive load(*) - - Maximum inductive load LL_max.
Source
Safety switch /safety outputs: C3
Drain
Safety monitoring unit (e.g. safety controller): C1, C2, C3
(*) Optional indication of the manufacturer.

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SMART T-Connector with DCD SEU-1/0-T45 Series
3.1 Dimensions (All measurements are listed in millimeters, unless noted otherwise. Dimensions in [ ]: inch)

0800000947_en |Orig. 01 |2021-11-16 |0271-21 15 / 18 www.bernstein.eu
SMART T-Connector with DCD SEU-1/0-T45 Series
5 Product Support and Maintenance
5.1 Maintenance and Service
Do not use alcoholic cleaning agents.
The SEU-1/0-T45-... is maintenance-free.
For long-term and trouble-free operation, please periodically check the following points:
• solid fit of all components
• reliable switching function
• if damage occurs, please exchange the relevant components
Liability disclaimer— By breach of the given instructions (concerning the intended use, the safety instructions, the instal-
lation and connection through qualified personnel and the testing of the safety function) manufacturer’s liability expires.
5.2 Status Indicators
The SEU-1/0-T45-... has matching indicators on both sides to allow for installation needs and still provide adequate indi-
cation visibility. Each indicator displays both red and green. When power is applied, both LEDs flash red/green/ off, then
turn on in the appropriate state (red or green).
Input Device Status
(Two NC Contact
Status)
OSSD Inputs SEU-1/0-T45-...
Status
OSSD Outputs Input Device LED DCD Status
LED
Run State (closed) On Normal On Green Green
Run State (closed) O Normal O Green Red
O State (open) On Normal O Red Green
O State (open) O Normal O Red Red
x x Fault (Volt. Mon) O Red Flashing Red Flashing
Run State (closed) On Fault (OSSD) On/O * Red Flashing Red Flashing
x x Fault (internal) O Red Flashing Red Flashing
*OSSD Fault Tolerant Mode: OSSDs remain on for 20 minutes then turn off. For more information, see Fault Tolerant Out-
put Feature on p. 6.
Input Device Status
Indicator (on both sides)
Rotate 180˚
DCD Status Indicator
(on both sides)
Figure 8. SEU-1/0-T45-... status indicators

0800000947_en |Orig. 01 |2021-11-16 |0271-21 16 / 18 www.bernstein.eu
SMART T-Connector with DCD SEU-1/0-T45 Series
5.3 BERNSTEIN AG Limited Warranty
If the instructions (proper use, safety instructions, installation and connection by trained personnel, testing for safe
operation) are violated, the manufacturer‘s liability expires.

0800000947_en |Orig. 01 |2021-11-16 |0271-21 17 / 18 www.bernstein.eu
SMART T-Connector with DCD SEU-1/0-T45 Series
5.4 EU Declaration of Conformity (DoC)
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