Beckhoff EPP3744 041 Series User manual

Documentation | EN
EPP3744-x041
EtherCAT P Box modules with pressure inputs
2023-02-01 | Version: 1.3

Table of contents
EPP3744-x041 3Version: 1.3
Table of contents
1 Foreword....................................................................................................................................................5
1.1 Notes on the documentation .............................................................................................................5
1.2 Safety instructions.............................................................................................................................6
1.3 Documentation Issue Status .............................................................................................................7
2 Product group: EtherCATPBox modules..............................................................................................8
3 Product overview ......................................................................................................................................9
3.1 Introduction .......................................................................................................................................9
3.2 Technical data.................................................................................................................................10
3.2.1 Absolute pressure measuring range ................................................................................12
3.3 Scope of supply...............................................................................................................................13
3.4 Process image ................................................................................................................................14
4 Mounting and connection.......................................................................................................................16
4.1 Mounting .........................................................................................................................................16
4.1.1 Dimensions ......................................................................................................................16
4.1.2 Fixing................................................................................................................................ 17
4.1.3 Tightening torques for connectors.................................................................................... 17
4.1.4 Functional earth (FE) ....................................................................................................... 17
4.2 Connection ......................................................................................................................................18
4.2.1 EtherCATP ......................................................................................................................18
4.2.2 Pressure inputs ................................................................................................................22
4.2.3 Digital inputs and outputs................................................................................................. 24
4.3 UL Requirements ............................................................................................................................25
4.4 Disposal ..........................................................................................................................................26
5 Commissioning/Configuration...............................................................................................................27
5.1 Absolute pressure / differential pressure.........................................................................................27
5.2 Filter ................................................................................................................................................28
5.3 Limit value monitoring .....................................................................................................................30
5.4 Restore the delivery state ...............................................................................................................32
6 CoE parameters.......................................................................................................................................33
6.1 Object overview...............................................................................................................................33
6.2 Object description and parameterization.........................................................................................39
6.2.1 Objects to be parameterized during commissioning ........................................................39
6.2.2 Standard objects (0x1000-0x1FFF) ................................................................................. 43
6.2.3 Profile specific objects (0x6000-0xFFFF)......................................................................... 50
7 Appendix..................................................................................................................................................55
7.1 General operating conditions ..........................................................................................................55
7.2 Accessories.....................................................................................................................................56
7.3 Version identification of EtherCAT devices .....................................................................................57
7.3.1 General notes on marking................................................................................................ 57
7.3.2 Version identification of EP/EPI/EPP/ER/ERI boxes........................................................ 58
7.3.3 Beckhoff Identification Code (BIC) ................................................................................... 59
7.3.4 Electronic access to the BIC (eBIC)................................................................................. 61
7.4 Support and Service........................................................................................................................63

Table of contents
EPP3744-x0414 Version: 1.3

Foreword
EPP3744-x041 5Version: 1.3
1 Foreword
1.1 Notes on the documentation
Intended audience
This description is only intended for the use of trained specialists in control and automation engineering who
are familiar with the applicable national standards.
It is essential that the documentation and the following notes and explanations are followed when installing
and commissioning these components.
It is the duty of the technical personnel to use the documentation published at the respective time of each
installation and commissioning.
The responsible staff must ensure that the application or use of the products described satisfy all the
requirements for safety, including all the relevant laws, regulations, guidelines and standards.
Disclaimer
The documentation has been prepared with care. The products described are, however, constantly under
development.
We reserve the right to revise and change the documentation at any time and without prior announcement.
No claims for the modification of products that have already been supplied may be made on the basis of the
data, diagrams and descriptions in this documentation.
Trademarks
Beckhoff®, TwinCAT®, TwinCAT/BSD®, TC/BSD®, EtherCAT®, EtherCATG®, EtherCATG10®, EtherCATP®,
SafetyoverEtherCAT®, TwinSAFE®, XFC®, XTS® and XPlanar® are registered trademarks of and licensed by
Beckhoff Automation GmbH. Other designations used in this publication may be trademarks whose use by
third parties for their own purposes could violate the rights of the owners.
Patent Pending
The EtherCAT Technology is covered, including but not limited to the following patent applications and
patents: EP1590927, EP1789857, EP1456722, EP2137893, DE102015105702 with corresponding
applications or registrations in various other countries.
EtherCAT® is registered trademark and patented technology, licensed by Beckhoff Automation GmbH,
Germany.
Copyright
© Beckhoff Automation GmbH & Co. KG, Germany.
The reproduction, distribution and utilization of this document as well as the communication of its contents to
others without express authorization are prohibited.
Offenders will be held liable for the payment of damages. All rights reserved in the event of the grant of a
patent, utility model or design.

Foreword
EPP3744-x0416 Version: 1.3
1.2 Safety instructions
Safety regulations
Please note the following safety instructions and explanations!
Product-specific safety instructions can be found on following pages or in the areas mounting, wiring,
commissioning etc.
Exclusion of liability
All the components are supplied in particular hardware and software configurations appropriate for the
application. Modifications to hardware or software configurations other than those described in the
documentation are not permitted, and nullify the liability of Beckhoff Automation GmbH & Co. KG.
Personnel qualification
This description is only intended for trained specialists in control, automation and drive engineering who are
familiar with the applicable national standards.
Description of instructions
In this documentation the following instructions are used.
These instructions must be read carefully and followed without fail!
DANGER
Serious risk of injury!
Failure to follow this safety instruction directly endangers the life and health of persons.
WARNING
Risk of injury!
Failure to follow this safety instruction endangers the life and health of persons.
CAUTION
Personal injuries!
Failure to follow this safety instruction can lead to injuries to persons.
NOTE
Damage to environment/equipment or data loss
Failure to follow this instruction can lead to environmental damage, equipment damage or data loss.
Tip or pointer
This symbol indicates information that contributes to better understanding.

Foreword
EPP3744-x041 7Version: 1.3
1.3 Documentation Issue Status
Version Comment
1.3 • EtherCATP status LEDs updated
1.2 • Fittings mating cycles amended
• Chapter "Connecting hoses" amended
1.1 • Dimensions updated
• UL requirements updated
1.0 • First release
Firmware and hardware versions
This documentation refers to the firmware and hardware version that was applicable at the time the
documentation was written.
The module features are continuously improved and developed further. Modules having earlier production
statuses cannot have the same properties as modules with the latest status. However, existing properties
are retained and are not changed, so that older modules can always be replaced with new ones.
The firmware and hardware version (delivery state) can be found in the batch number (D-number) printed on
the side of the EtherCAT Box.
Syntax of the batch number (D-number)
D: WW YY FF HH
WW - week of production (calendar week)
YY - year of production
FF - firmware version
HH - hardware version
Example with D no. 29 10 02 01:
29 - week of production 29
10 - year of production 2010
02 - firmware version 02
01 - hardware version 01
Further information on this topic: Version identification of EtherCAT devices [}57].

Product group: EtherCATPBox modules
EPP3744-x0418 Version: 1.3
2 Product group: EtherCATPBox modules
EtherCATP
EtherCATP supplements the EtherCAT technology with a process in which communication and supply
voltages are transmitted on a common line. All EtherCAT properties are retained with this process.
Two supply voltages are transmitted per EtherCATP line. The supply voltages are electrically isolated from
each other and can therefore be switched individually. The nominal supply voltage for both is 24VDC.
EtherCATP uses the same cable structure as EtherCAT: a 4-core Ethernet cable with M8 connectors. The
connectors are mechanically coded so that EtherCAT connectors and EtherCATP connectors cannot be
interchanged.
EtherCATP Box modules
EtherCATP Box modules are EtherCATP slaves with degree of protection IP67. They are designed for
operation in wet, dirty or dusty industrial environments.
EtherCAT basics
A detailed description of the EtherCAT system can be found in the EtherCAT system documentation.

Product overview
EPP3744-x041 9Version: 1.3
3 Product overview
3.1 Introduction
Tx+ / GND
Rx+ / GND
Rx- / U
Tx- / U
1 |
2 |
3 |
4 |
S
P
P
S
EtherCAT P
downstream connection
EtherCAT P
input
Digital inputs,
digital outputs
Pressure inputs,
6-mm fitting
1 |
2 |
3 |
4 |
+24 V U
Input
GND
Input
S
S
1 |
2 |
3 |
4 |
+24 V U
Output
GND
Input
S
S
X03, X04
X01, X02
Differential pressure measuring box, 6 digital inputs, 2 digital outputs, 0.5 A, 4 pressure inputs
The EPP3744-x041 EtherCAT P Box, equipped with six digital inputs, two digital outputs and four pressure
inputs, acquires these signals and transmits them – electrically isolated – to the controller. The signal status
is indicated by LEDs; the digital signals are connected via 4-pin M8 plug connectors.
EPP3744-0041
The pressure is measured as the differential pressure to the fifth connection by an integrated 6 mm fitting.
The pressure values are available as 16-bit values. Measurement can be made between -1…1 bar, with the
value being output in relation to the fifth connection, e.g. for vacuum measurement in relation to the ambient
pressure at suction grippers. In absolute-pressure mode it is possible to measure pressures between 0…1
bar.
EPP3744-1041
The pressure is measured as the differential pressure to the fifth connection by an integrated 6 mm fitting.
The pressure values are available as 16-bit values. Measurement can be made between -7…7 bar, with the
value being output in relation to the fifth connection, e.g. for vacuum measurement in relation to the ambient
pressure at suction grippers. In absolute-pressure mode it is possible to measure pressures between 0…7
bar.
The operating mode is preselected via CoE parameters. If the supply voltages fall below a certain level (18.5
V) a diagnostic bit is set.
Quick links
Technical data [}10]
Process image [}14]
Dimensions [}16]
Commissioning [}27]

Product overview
EPP3744-x04110 Version: 1.3
3.2 Technical data
All values are typical values over the entire temperature range, unless stated otherwise.
EtherCATP
Connection 2xM8 socket, 4-pin, P-coded, red
Distributed Clocks yes
Minimum cycle time 700µs
Supply voltages
Connection See EtherCATP connection
US nominal voltage 24VDC (-15%/ +20%)
US sum current: IS,sum max. 3A
Current consumption from US100mA
+ Current consumption of connected sensors
+ Loads at digital outputs
Rated voltage UP24VDC (-15%/ +20%)
UP sum current: IP,sum max. 3A
Current consumption from UPNone. UP is only forwarded.
Diagnostics Undervoltage detection
• US < 18VDC
• UP < 18VDC
Pressure inputs EPP3744-0041 EPP3744-1041
Number 4
+1reference input for the differential pressure measurement
Connections Fittings, d=6mm
Number of mating cycles 5
Type of pressure measurement Adjustable [}27]:
• Absolute pressure measurement
• Differential pressure measurement (factory setting)
Absolute pressure measuring range [}12] 0…1bar 1)
(0…15psi)
0…7bar 1)
(0…100psi)
Differential pressure measuring range2) -1…+1bar
(-15…+15psi)
-7…+7bar
(-100…+100psi)
Resolution 1mbar per LSB
Measuring error 3% of the full scale value
Conversion time 5EtherCAT cycles
(Note the minimum EtherCAT cycle time, see above)
Permissible media non-aggressive gases
Maximum overload of an input 3bar absolute pressure2) 21bar absolute pressure2)
1) 0bar=vacuum
1bar = ambient pressure
2) Even in the case of differential pressure measurement, the absolute pressure measuring range [}12] must
not be exceeded at any pressure input.

Product overview
EPP3744-x041 11Version: 1.3
Digital inputs
Number 6
Connection 4x M8 socket
Characteristics EN61131-2 type3, compatible with type1
Signal voltage "0" -3…+5V
Signal voltage "1" +11…+30V
Input current 3mA at 24V
Sensor power supply 24VDC from the control voltage US
max. 0.5A in total, short-circuit proof
Digital outputs
Number 2
Connection 2x M8 socket (sockets X03 and X04)
Nominal output voltage 24VDC from the control voltage US
Output current max. 0.5A per output, individually short-circuit proof
Housing data
Dimensions WxHxD 30mmx 126mmx 26.5mm
(without connectors and fittings)
Weight approx. 175 g
Installation position variable
Material PA6 (polyamide)
Environmental conditions
Ambient temperature during operation -25 … +60°C
-25 … +55°C according to cULus
Ambient temperature during storage -40 … +85°C
Vibration resistance, shock resistance conforms to EN60068-2-6/ EN60068-2-27
Additional checks [}11]
EMC immunity / emission conforms to EN61000-6-2/ EN61000-6-4
Protection class IP65, IP66, IP67 (conforms to EN60529)
Approvals/ markings
Approvals/ markings*) CE, cULus [}25]
*) Real applicable approvals/markings see type plate on the side (product marking).
Additional tests
The devices have undergone the following additional tests:
Test Explanation
Vibration 10 frequency sweeps in 3 axes
5Hz<f<60Hz displacement 0.35mm, constant amplitude
60.1Hz<f<500Hz acceleration 5g, constant amplitude
Shocks 1000 shocks in each direction, in 3 axes
35g, 11ms

Product overview
EPP3744-x04112 Version: 1.3
3.2.1 Absolute pressure measuring range
The absolute pressure measuring range must be adhered to for each pressure connection, regardless of the
chosen measurement method (absolute pressure / differential pressure):
Vacuum
Absolute pressure
Measuring
range
Ambient pressure
0 bar
1 bar
2 bar
Vacuum
Absolute pressure
Measuring
range
Ambient pressure
0 bar
1 bar
3 bar
4 bar
5 bar
6 bar
7 bar
8 bar
EPP3744-0041 EPP3744-1041

Product overview
EPP3744-x041 13Version: 1.3
3.3 Scope of supply
Make sure that the following components are included in the scope of delivery:
• 1x EtherCAT PBox EPP3744-x041
• 2x protective cap for EtherCATP socket, M8, red (pre-assembled)
• 10x labels, blank (1 strip of 10)
Pre-assembled protective caps do not ensure IP67 protection
Protective caps are pre-assembled at the factory to protect connectors during transport. They may
not be tight enough to ensure IP67 protection.
Ensure that the protective caps are correctly seated to ensure IP67 protection.

Product overview
EPP3744-x04114 Version: 1.3
3.4 Process image
The 6 digital inputs of the module can be found under DIG Inputs 1 to 6.
• Input 1 - socket X01, pin 4
• Input 2 - socket X01, pin 2
• Input 3 - socket X02, pin 4
• Input 4 - socket X02, pin 2
• Input 5 - socket X03, pin 4
• Input 6 - socket X04, pin 4
The four pressure measuring inputs of the module can be found under AI
inputs Channel 1 to 4.
• Underrange: the value fell below the underrange value
• Overrange: the overrange value was exceeded
• Limit1: the Limit1 value specified in the CoE objects was reached
• Limit2: the Limit2 value specified in the CoE objects was reached
• Error: one of the above events has occurred
• Value: the pressure measured in the unit that was pre-scaled in the CoE
objects (e.g. mbar).
Assignment of the channels to the connections at the housing [}22]
The diagnostic data for the module can be found under DEV Inputs Device.
• Safe State Active: there was an interruption in communication, causing the
outputs to change to the safe state
• Sync error: a synchronization error has occurred
• Undervoltage Us: the voltage US is less than approx. 18VDC
• Undervoltage Up: the voltage UP is less than approx. 18VDC
• TxPDO Toggle: EtherCAT variable for displaying a transmitted date of
receipt (see general EtherCAT documentation)
The two digital outputs of the module can be found under DIG outputs 1 and
2.
• Output 1 - socket X03, pin 2
• Output 2 - socket X04, pin 2
The output variables for setting or resetting the outputs of the module can be
found under DEV Output Device.
• Set safe state: the outputs change to the safe state (see CoE objects)
• Reset Outputs: reserved

Product overview
EPP3744-x041 15Version: 1.3
These are standard EtherCAT variables; more information in the general
EtherCAT manual.

Mounting and connection
EPP3744-x04116 Version: 1.3
4 Mounting and connection
4.1 Mounting
4.1.1 Dimensions
30
126
119
26.52314
Ø 3.5 13.5
All dimensions are given in millimeters.
The drawing is not true to scale.
Housing features
Housing material PA6 (polyamide)
Sealing compound polyurethane
Mounting two mounting holes Ø 3.5 mm for M3
Metal parts brass, nickel-plated
Contacts CuZn, gold-plated
Installation position variable
Protection class IP65, IP66, IP67 (conforms to EN 60529) when screwed together
Dimensions (H x W x D) approx. 126 x 30 x 26.5 mm (without connectors)

Mounting and connection
EPP3744-x041 17Version: 1.3
4.1.2 Fixing
NOTE
Dirt during assembly
Dirty connectors can lead to malfunctions. Protection class IP67 can only be guaranteed if all cables and
connectors are connected.
• Protect the plug connectors against dirt during the assembly.
Mount the module with two M3 screws on the mounting holes in the corners of the module. The mounting
holes have no thread.
4.1.3 Tightening torques for connectors
Screw M8 connectors tight with a torque wrench. (e.g. ZB8801 from Beckhoff)
Torque: 0.4Nm.
4.1.4 Functional earth (FE)
The upper mounting holes also serves as a connection for functional earth (FE).
Make sure that the box is grounded to low impedance via the functional earth (FE) connection. You can
achieve this, for example, by mounting the box on a grounded machine bed.
FE
Fig.1: Connection for functional earth (FE)

Mounting and connection
EPP3744-x04118 Version: 1.3
4.2 Connection
4.2.1 EtherCATP
WARNING
Power supply from SELV/PELV power supply unit!
SELV/PELV circuits (Safety Extra Low Voltage, Protective Extra Low Voltage) according to
IEC61010-2-201 must be used to supply the EtherCATP Power Sourcing Device (PSD).
Notes:
• SELV/PELV circuits may give rise to further requirements from standards such as IEC60204-1etal, for
example with regard to cable spacing and insulation.
• A SELV (Safety Extra Low Voltage) supply provides safe electrical isolation and limitation of the voltage
without a connection to the protective conductor,
a PELV (Protective Extra Low Voltage) supply also requires a safe connection to the protective conduc-
tor.
CAUTION
Observe the UL requirements
• When operating under UL conditions, observe the warnings in the chapter UL Requirements [}25].
EtherCATP transmits two supply voltages:
•Control voltage US
The following sub-functions are supplied from the control voltage US:
◦ the fieldbus
◦ the processor logic
◦ typically the inputs and the sensors if the EtherCATPBox has inputs.
•Peripheral voltage UP
The digital outputs are typically supplied from the peripheral voltage UP for EtherCATPBox modules
with digital outputs. UP can be supplied separately. If UP is switched off, the fieldbus function, the
function of the inputs and the supply of the sensors are maintained.
The exact assignment of US and UP can be found in the pin assignment of the I/O connections.
Redirection of the supply voltages
The supply voltages are passed on internally from the "IN" connection to the "OUT" connection. Hence, the
supply voltages US and UP can be passed from one EtherCATPBox to the next EtherCATPBox in a simple
manner.
NOTE
Note the maximum current.
Ensure that the maximum permitted current of 3A for the M8 connectors is not exceeded when redirecting
EtherCATP.

Mounting and connection
EPP3744-x041 19Version: 1.3
4.2.1.1 Connectors
NOTE
Risk of damage to the device!
Bring the EtherCAT/EtherCATP system into a safe, powered down state before starting installation, disas-
sembly or wiring of the modules!
Two M8 sockets at the upper end of the modules are provided for supply and downstream connection of
EtherCATP:
• IN: left M8 socket for EtherCATP supply
• OUT: right M8 socket for downstream connection of EtherCATP
The metal threads of the M8 EtherCAT P sockets are internally linked to the FE connection via high
impedance RC combination. See chapter Functional earth (FE) [}17].
Fig.2: Connectors for EtherCATP
1
2
3
4
Fig.3: M8 socket, p-coded
Contact Signal Voltage Core color1)
1 Tx + GNDSyellow
2 Rx + GNDPwhite
3 Rx - UP: peripheral voltage, +24VDC blue
4 Tx - US: control voltage, +24VDC orange
Housing Shield Shield Shield
1) The core colors apply to EtherCATP cables and ECP cables from Beckhoff.

Mounting and connection
EPP3744-x04120 Version: 1.3
4.2.1.2 Status LEDs
4.2.1.2.1 Supply voltage
EtherCATPBox modules indicate the status of the supply voltages via two status LEDs. The status LEDs
are labeled with the designations of the supply voltages: Us and Up.
LED Display Meaning
US
(control voltage)
off US not present.
green illuminated US present.
red illuminated Error. 1)
UP
(peripheral voltage)
off UP not present.
green illuminated UP present.
red illuminated Error. 1)
1) Overload of the sensor supply/auxiliary voltage output at the signal interfaces.
You can find out whether the sensor supply/auxiliary voltage is derived from US or from UP from the
assignment of the signal interfaces.
4.2.1.2.2 EtherCAT
L/A (Link/Act)
A green LED labeled "L/A" or "Link/Act" is located next to each EtherCAT/EtherCATP socket. The LED
indicates the communication state of the respective socket:
LED Meaning
off no connection to the connected EtherCAT device
lit LINK: connection to the connected EtherCAT device
flashes ACT: communication with the connected EtherCAT device
Run
Each EtherCAT slave has a green LED labelled "Run". The LED signals the status of the slave in the
EtherCAT network:
LED Meaning
off Slave is in "Init" state
flashes uniformly Slave is in "Pre-Operational“ state
flashes sporadically Slave is in "Safe-Operational" state
lit Slave is in "Operational" state
Description of the EtherCAT slave states