Hydac EDS 3400 User manual

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Operating Instructions
(Translation of original
instructions)
Electronic Pressure
Switch
EDS 3400
p0-Guard for Hydraulic
Accumulators
Part no.: 670000 / Edition: 2018-07-30 E

2 EDS 3400
Status: 2018-07- HYDAC INTERNATIONAL GMBH Part No.: 670000 E
Content
1 Safety Information 3
2 Disclaimer 3
3 Functions of the EDS 3400 3
3.1MAIN FUNCTIONS 3
3.2ADDITIONAL FUNCTIONS 4
4 Assembly 4
5 Control elements of the EDS 3400 5
6 Reading the digital display 6
7 Commissioning 7
8 Operation Modes 8
8.1SIO MODE 8
8.2SDCI MODE 8
9 Parameterisation 8
9.1PARAMETERISATION VIA IO-LINK MASTER 8
9.2MANUAL PARAMETERISATION ON THE DEVICE 9
9.3PARAMETERISATION WITH HYDAC PROGRAMMING DEVICE HPG P1-000 9
9.4PARAMETERISATION WITH HYDAC PROGRAMMING ADAPTER ZBE P1-000 9
10Output settings 10
10.1SWITCHING OUTPUTS 10
10.1.1Setting of the switch point (SP2) -
Accumulator charge, twopoint mode 10
10.1.2Setting of the pre-charge pressure monitoring 11
10.2SETTING RANGES FOR THE SWITCHING OUTPUTS 11
10.3ANALOGUE OUTPUT 11
11Basic Settings 12
11.1MAIN MENU 12
11.2EXTENDED FUNCTIONS 13
12Changing the Basic Settings 14
13Resetting the peak values 14
14Offset calibration 14
15Program enable 15
15.1CHANGING THE PROGRAM ENABLE 15
16Error Messages 15
17PIN connection 16
18Technical Data 17
19Order details 18
20Accessories 19
20.1FOR ELECTRICAL CONNECTION 19
20.2FOR MECHANICAL CONNECTION 19
21Instrument dimensions 21

EDS 3400 3
Status: 2018-07-30 HYDAC INTERNATIONAL GMBH Part No.: 670000 E
1 Safety Information
Before commissioning, check the instrument and any accessories supplied. Before
commissioning, please read the operating instructions. Ensure that the unit is suitable for
your application.
Keep the manual in the vicinity of the instrument for immediate reference. Please note that
the specifications given in this documentation regarding the instrument technology were
correct at the time of publishing. Modifications to technical specifications, illustrations and
dimensions are therefore possible.
If the instrument is not handled correctly, or if the operating instructions and specifications
are not adhered to, damage to property or personal injury can result.
2 Disclaimer
This operating manual was made to the best of our knowledge. Nevertheless and despite
the greatest care, it is possible that it may contain errors. Therefore please understand
that in the absence of any provisions to the contrary hereinafter our warranty and liability
– for any legal reasons whatsoever – are excluded in respect of the information in this
operating manual. In particular, we shall not be liable for lost profit or other financial loss.
This exclusion of liability does not apply in cases of intent and gross negligence.
Moreover, it does not apply to defects which have been deceitfully concealed or whose
absence has been guaranteed, nor in cases of culpable harm to life, physical injury and
damage to health. If we negligently breach any material contractual obligation, our
liability shall be limited to foreseeable damage. Claims due to the Product Liability shall
remain unaffected.
Relevant language: legal notes, please see www.hydac.com
3 Functions of the EDS 3400
3.1 MAIN FUNCTIONS
xPressure sensor with analogue output for pressure monitoring on the fluid side of the
hydro accumulator.
xSupports the control of the accumulator charging function
xDetection and signalisation of the accumulator precharge pressure drop (p0)
Æp0-Guard
NOTES:
xIt is essential for the functioning of the p0-Guard that the hydro accumulator has
discharged completely before use.
xThe function of the p0-Guard can be combined with the following HYDAC
accumulator systems:
Bladder accumulators, piston accumulators, diaphragm accumulators, metal
bellows accumulators as well as back-up type hydraulic accumulators and
accumulator stations.
xIf the hydro accumulators are arranged in parallel (e.g. in an accumulator
station with multiple hydro accumulators), the p0-Guard recognises and
signalises the critical accumulator pre-charge pressure (p0) However, an
assignment of the critical hydro accumulator (regarding p0) is not possible.

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Status: 2018-07-30 HYDAC INTERNATIONAL GMBH Part No.: 670000 E
3.2 ADDITIONAL FUNCTIONS
x1 diagnostic/warning function and 1 switching output or 1 analogue output
xDisplay of the actual pressure in PSI, MPa, bar
xDetection and display of the max. value
xCommunication via IO-Link acc. specification V1.1 and V1.0 is possible
xFlexible adaption by parameterisation of the EDS via the HYDAC programming device
HPG P1-000, the HYDAC programming adapter ZBE P1-000 or the
HYDAC measuring device HMG 4000
xAdditional information via the LED display on the operating mode and the switching
statuses.
4 Assembly
The installation of the EDS 3400 is carried out on the fluid side.
The EDS 3400 is mounted via the pressure port as close as possible to
the accumulator (Example: to the left of the diaphragm accumulator via
a safety and shut-off block SAF).
Please also observe the following installation recommendations.
For torque value, see Chapter 18 - Technical data.
Installation recommendation
Safety and shut-off
block SAF
It is recommended to mount the p
0
onto a safety and shut-off
block (SAF) which is usually located close to the hydro
accumulator.
Bladder
accumulator vent
hole
If using bladder accumulators, the vent hole at the oil valve can
also be used. When mounting the p
0
-Guard on the vent hole of
the bladder accumulator, the function of the vent screw is no
longer usable.
Control block If using accumulator stations (parallel arrangement of the hydro
accumulators), the p
0
-Guard should be mounted onto a central
strip or to a central control block.
To ensure optimal positioning, the unit can be rotated by 340° about its long axis, and the
display and key pad can be rotated by 270°.
The electrical connection must be carried out by a qualified electrician according to the
relevant regulations of the country concerned (VDE 0100 in Germany). The pressure switch
housing must be earthed correctly at the same time. When fitted into a hydraulic block,
earthing the block via the hydraulic system is sufficient.

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CAUTION:
The EDS 3400 must be fitted using a suitable open-end wrench
(across flats 27) on the hexagon nut of the pressure connection.
Inappropriate installation methods, such as manually fitting above the housing can
damage the housing or even cause the device to fail completely, due to the
rotatability of the EDS 3400.
Additional installation suggestions which, from experience, reduce the effect of
electromagnetic interference:
xMake line connections as short as possible
xUse shielded lines (e.g. LIYCY 4 x 0.5 mm²)
xThe cable screening must be fitted by qualified personnel subject to the ambient
conditions and with the aim of suppressing interference.
xKeep the unit well away from the electrical supply lines of power equipment, as well as
from any electrical or electronic equipment causing interference.
5 Control elements of the EDS 3400
xDescending in the menu xChoose menu item xAscending in the menu
xDecrease value xConfirm value xIncrease the value
Indication of the pressure unit
(i.e. in bar)
4-digit
Digital display
LED-Display of
the active switch point
Operating buttons
LED display constantly lit: Switch in SIO mode
LED display flashing: Switch in SDCI mode
mode

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6 Reading the digital display
Description Representation on
7-segment display
ASCII
representation
Accumulator precharge p0P0 P0
Switch-of value not yet determined n.A. n.A.
Actual system pressure
A(( ACT
Max value pre-set, output 1 (display only) fk1 FH1
Switch point, output 1 FL1 FL1
Switch point, output 2 sp2 SP2
Switch-back point, output 2 rp2 RP2
Add-on functions ef EF
Reset res RES
No No No
Yes Yes Yes
set-back --- ---
Lower pressure value (when falling below,
the monitoring is terminated) P.LoU P.LoW
Outlet 2 ov2 Ou2
N/O when hysteresis function is active kno HNO
N/C when hysteresis function is active Kn( HNC
Current output i I
Voltage output v U
Unit conversion vni Uni
Unit in bar bar bar
Unit in MPa mpa MPa
Unit in psi Ps ; psi
Max. value k ; Hi
Reset max value rS.kL rS.HL
Offset calibration (ALi CALi
New nEU nEU
Error indication ERR ERR
Teach
(ea( TEAC
Taught p0value
(.Ual T.VAL
Max value, pre-set
(may not be changed)
(d.X ; Td.Hi
Permissible p0-loss
(d.Lo Td.Lo

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Status: 2018-07-30 HYDAC INTERNATIONAL GMBH Part No.: 670000 E
Programming lock Pr6 PrG
free FREE FrEE
Locked Lo( LoC
Version Uer VEr
7 Commissioning
NOTES:
xIf the current pressure exceeds the device's nominal pressure, it can no longer
be displayed, and the display begins to flash.
If the actual pressure is below 0.6 % of the nominal range, 0 bar will be
displayed.
xThe accumulator pre-charge pressure, referred to in the following by p0, only
approximately corresponds with the real p0in the hydro accumulator.
Temperature dependencies and the design of the accumulator system can
cause reproducible deviation.
xPlease read the operating manual relevant for the used system!
xFurther information on hydro accumulators can be found in the following
brochure: HYDAC Accumulators No. 3000
xCheck the "main menu" to see if the pre-set values of the factory settings are sufficient
for the upper opereating pressure (SP2) and the lower operating pressure (RP2).
The following applies:
RP2 < SP2.
xIn the "main menu", please set the value for the upper operating pressure (SP2)
applying in your system.
xIn the "main menu", please set the value for the lower operating pressure (RP2)
applying in your system.
xSet P.Low in the menu "expanded functions".
xOperate the system under the normal operating conditions.
xApply the upper and lower operating pressure twice in order to check the switching
behaviour of switching output 2 (accumulator charge function) for proper functioning.
xSet and hold the upper operating pressure applying for the system.
xLower the system pressure down to p P.Low.
NOTE:
The monitoring of the pressure signal according to p0 is only performed within a
range between RP2 and P.Low. The pressure must be P.Low when the hydro
accumulator is completely emptied in order to enable the software of the
EDS 3400 to complete the monitoring and to show p0 in the display.
xCheck if p0is displayed in the "main menu".
xSave the value for p0in the menu "expanded functions" by means of TEAC.
xCheck the saved value for p0in the menu "expanded functions" by means of TVal.

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xTdLo (intended max. permitted pre-charge pressure drop).
The following applies:
FL1 = T.VAL – Td.Lo
Commissioning completed. The switching output 1 (SP1) switches as soon as the pre-
charge pressure falls below the value for FL1. The LED SP1 switches off.
8 Operation Modes
8.1 SIO MODE
After start-up, the pressure switch is in SIO mode (standard I/O mode). In this mode (pin
assignment, see chap. 17), pin 4 is assigned the function "warning, pre-charge pressure
not OK".
The centre LED is constantly lit.
According Chapter 11 (basic settings, main menu and extended functions) the behaviour of
the EDS 3400 can be adjusted to the corresponding application.
8.2 SDCI MODE
Via a connected IO-Link master the pressure switch can be switched to the SDCI mode
(Single-drop digital communication interface for small sensors and actuators) by means of a
wake-up signal. In this mode, Pin 4 serves as a communication pin (pin connection, see
chapter 17) The master is able to communicate with the pressure switch in order to change
parameters or to read out measured values.
The centre LED flashes.
9 Parameterisation
9.1 PARAMETERISATION VIA IO-LINK MASTER
The pressure switch can be parameterised via the IO-Link interface by means of any IO-
Link compatible master configuration tool (according IO-specifications V1.1). Supports IO-
Link specifications V1.0
Should the read parameter sets from the device not be accepted, we recommend to carry
out a plausibility check of the parameter set.
For detailed information on IO-Link device parameters, factory defaults, process and
diagnostic data, supported standard system commands as well as additional HYDAC device
specific system commands for the various product versions (part numbers), please refer to
the corresponding IODD (IO Device Description).
You will find the link for download of the IODD at https://ioddfinder.io-link.com/#/

EDS 3400 9
Status: 2018-07-30 HYDAC INTERNATIONAL GMBH Part No.: 670000 E
9.2 MANUAL PARAMETERISATION ON THE DEVICE
The EDS 3400 can be parameterised via the device keys
9.3 PARAMETERISATION WITH HYDAC PROGRAMMING DEVICE HPG P1-000
(Connection with standard cable)
Device
1
HPG P1
2
3
4
1
2
3
4
+Ub
0 V
1
2
3
4
+Ub
0 V
Q1 / C
9.4 PARAMETERISATION WITH HYDAC PROGRAMMING ADAPTER ZBE P1-000
(Connection with standard cable)
Device
1
ZBE P1
2
3
4
1
2
3
4
L+
L- USB
Q2 / QA
PC
Q1 / C

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10 Output settings
10.1 SWITCHING OUTPUTS
The EDS 3400 has 2 switching outputs whose switching behaviour (setting pre-charge
pressure monitoring or twopoint mode) is parameterisable.
In addition to the IO-Link Smart Sensor Profile Specification, a switch and switch-back delay
can be set in HYDAC IO-Link sensors.
NOTE:
Exceeding or falling below the measuring range leads to a limitation to the
corresponding upper or lower limit of the measuring range.
10.1.1 Setting of the switch point (SP2)
- Accumulator charge, twopoint mode
One switch point and one switch-back point can be set for each switching output. The
particular output will switch when the pre-set switch point is reached and then switch back
when the level drops below the switch-back point.
Example for switch point 2 (N/C and N/O function):
Abbreviations: "SP2" = switch point 2
"RP2" = switch-back point 2
"HNO", = N/O when hysteresis function is active
"HNC" = N/C when hysteresis function is active
NOTE:
It is only possible to set the switch point (SP) if it is higher than the respective
switch-back point (RP).
SP2
RP2
On
Off
On
Off
Normally closed function
Normally open function

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10.1.2 Setting of the pre-charge pressure monitoring
The pre-charge pressure monitoring is determined by the switching value ("FL1). This is
calculated as described in the following and can be checked in the main menu.
FL1 = T.VAL – Td.Lo
The output switches as soon as p0leaves this range. The output will switch back when the
pressure enters this range. The lower switch-back value is just below the lower switch
value.
Example:
Abbreviations: "FL1" =Lower switch value 1
10.2 SETTING RANGES FOR THE SWITCHING OUTPUTS
Measuring range Lower limit of
RP2 / FL1
Upper limit of
SP2
Minimum
difference betw.
RP2 and SP2
Increment*
in bar in bar in bar in bar in bar
0 ... 40 0.4 40 0.4 0.1
0 ... 100 1 100 1 0.2
0 ... 250 2.5 250 2.5 0.5
0 ... 400 4 400 4 1
0 ... 690 7 690 7 1
* All ranges shown in the table can be adjusted by the increments shown.
10.3 ANALOGUE OUTPUT
The universal output "ou2" can be set to 4 ... 20 mA or 0 ... 10 V (corresponding to
measuring range).
P
FL1 minus 1% FS
FL 1
T
Safety zone
Off
On
On
Off
Switch-back value
Switching value

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11 Basic Settings
The EDS 3400 can be adapted to suit the particular application as required by changing
multiple settings. These settings are combined in a menu shown by the example of a
p
0
–Guard with a measuring range of 0 .. 250 bar.
11.1 MAIN MENU
FHI:
Max value, output 1
(only display)

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11.2 EXTENDED FUNCTIONS
Td.Hi:
Max value, pre-set
(may not be changed)

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12 Changing the Basic Settings
NOTE:
When the menu is activated, no switching operations are carried out!
NOTE:
If there has been no activity in this menu for approx. 60 seconds, the menu will
automatically close and any changes you have made will not be applied.
13 Resetting the peak values
The pressure peak value can be reset.
xIn the extended functions menu, please press the key "" until „rSHL“ appears.
xPress the "mode" key.
xPress "" to select „YES“ and confirm by pressing the "mode" key - the max value is
now set back.
14 Offset calibration
The function "Cali" enables the calibration of the sensor offset. The current pressure is
saved as the new offset. This is possible in the range of +/- 3% of the instrument rated
pressure.
xIn the extended functions menu, please press the key "" until „Cali“ appears.
xPress the "mode" key.
xPress "" to select „YES“ and confirm by pressing the "mode" key.
"neW" appears in the display when a calibration has been carried out in the permitted
range, otherwise "Err" is displayed.
This function is useful, for example, if there is always a residual pressure left in the system
which should be displayed as 0 bar.
CAUTION:
Following an offset adjustment, for example on a 690 bar instrument, a pressure of
up to 18 bar will be displayed as 0 bar. Before any work is carried out on the
hydraulic system, ensure that the system is depressurised.

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15 Program enable
The instrument has a program enable which must be set to change the settings.
The program enable can be set or cancelled during operation. It provides protection against
unintentional alterations of settings.
15.1 CHANGING THE PROGRAM ENABLE
xIn the extended functions menu, please press the key "" until „PRG“ appears.
xPress the "mode" key.
xYou can choose between free programming "FREE" and locked programming "LoC".
By pressing "" or ““ you can switch between these options.
xConfirm by pressing the "mode" key.
16 Error Messages
If an error is detected, a corresponding error message appears which must be
acknowledged by pressing any key.
Possible error messages are as follows:
E.10 A data error has been detected in the saved settings. Possible causes are
strong electromagnetic interference or a defective component.
Action: Press "mode" and confirm "RES" by pressing "Yes". The factory settings will be
restored for all adjustable parameters and all minimum and maximum values
will be deleted.
Enter the data again from the beginning.
E.12 An error was detected in the saved calibration data. Possible causes are strong
electromagnetic interference or a defective component.
Action: Disconnect then reconnect the supply voltage to the instrument. If the error
persists, the instrument must be returned to the factory for recalibration or
repair.
E.21 A communication error within the unit has been detected. Possible causes are
strong electromagnetic interference or a defective component.
Action: Press "mode". If the error persists, disconnect then reconnect the supply
voltage to the instrument. If the error still persists, please contact our service
department.

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17 PIN connection
M 12x1, 4 pole
Pin Signal Description
1 L+ +UB
2 Q2/QA Switching output for the accumulator
charging function (SP2) / Analogue output
3 L- 0 V
4 Q1/C Switching output for the p0– guarding
function (SP1) / IO-Link communication
Q2/QA
Q1/C
3

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18 Technical Data
Input data
Measuring ranges ŇbarŇ40Ň100Ň250Ň400Ň690
Overload pressures ŇbarŇ80Ň200Ň500Ň800Ň1000
Burst pressure ŇbarŇ200Ň500Ň1000Ň2000Ň2000
Mechanical connection G1/4 A ISO 1179-2
Tightening torque, recommended 20 Nm
Parts in contact with fluid
Mech. connection: Stainless steel
Sensor cell: Stainless steel
Seal: FPM
Output data
Switching outputs PNP transistor outputs
Switching current: 1.2 A PIN 2
250 mA PIN 4
Analogue output, permitted load
resistance
Selectable: 4 ... 20 mA load resistance max. 500 
0 ... 10 V load resistance min. 1 k
Accuracy according to DIN 16086,
Limit point adjustment
± 0.5 % FS typ.
± 1 % FS max.
Temperature compensation, offset ± 0.015 % FS / °C typ.
± 0.025 % FS / °C max.
Temperature compensation, over range ± 0.015 % FS / °C typ.
± 0.025 % FS / °C max.
Repeatability ± 0.25 % FS max.
Reaction time < 10 ms
Long-term drift ± 0.3 % FS / year typ.
Ambient Conditions
Compensated temperature range -10 ... +70°C
Operating temperature range -25 ... +80 °C (-25 ... +60 °C for UL spec.)
Storage temperature range -40 ... +80 °C
Fluid temperature range -25 ... +80 °C
mark EN 61000-6-1 / 2 / 3 / 4
mark
1)
Certificate-No.: E318391
Vibration resistance according to
DIN EN 60068-2-6 at 0 ... 500 Hz
10 g
Shock resistance according to
DIN EN 60068-2-27 (11 ms)
50 g
Protection class to DIN EN 60529
2)
IP 67
Other data
Supply voltage
when applied according to UL
specifications
9 ... 35 V DC, if PIN 2 = SP2
18 ... 35 V DC, if PIN 2 = analogue output
– limited energy – according to 9.3 UL 61010; Class 2,
UL 1310/1585;LPS UL 60950
Residual ripple of supply voltage 5 %
Current consumption 35 mA without outputs
Show 4-digit, LED, 7-segment, red,
height of digits 7 mm
Weight ~ 120 g
Note: Excess voltage, override protection and short circuit protection are provided.
FS (Full Scale) = relative to complete measuring range
1)
Environmental conditions according to 1.4.2 UL 61010-1; C22.2 No 61010-1
2)
with mounted female connector having the corresponding protection class

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Relevant data for IO-Link:
Download the IO Device Description (IODD) from: https://ioddfinder.io-link.com/#/
Features
Block Parameters Yes
Data Storage Yes
Profile Characteristic 0x0001 (Device Profile: Smart Sensor),
0x8000 (Function Class: Device Identification),
0x8001 (Function Class: Binary Data Channel),
0x8002 (Function Class: Process Data Variables)
Supported Access Locks Parameters
Data Storage
Local Parameterisation
Local User Interface
Communication
IO-Link revision V1.1 / support V1.0
Transmission rate, baud rate
3)
38.4 kBaud (COM2)
Minimum cycle time 5 ms
Process data width 32 bit
SIO mode supported Yes
M-sequence capability PREOPERATE = TYPE_0
OPERATE = TYPE_2_2
ISDU supported
3)
Connection with unscreened standard sensor line possible up to a max. line length of 20 m.
19 Order details
EDS 3 4 4 6 - F31 - XXXX - P00
Mechanical connection
4 = G1/4 A ISO 1179-2
Electrical connection
6 = Male M12x1, 4 pole (connector not supplied)
Output
F31 = IO Link interface
Pressure range
0040; 0100; 0250; 0400; 0690
Modification Number
P00 = p0-Guard

EDS 3400 19
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20 Accessories
20.1 FOR ELECTRICAL CONNECTION
ZBE 06 (4 pole)
Female connector, right-angle
Part No.: 6006788
ZBE 06-02 (4 pole)
Female connector, right-angle with
2 m cable,
Part No.: 6006790
ZBE 06-05 (4 pole)
Female connector, right-angle with
5 m cable
Part No.: 6006789
Colour code:
Pin 1: brown
Pin 2: white
Pin 3: blue
Pin 4: black
20.2 FOR MECHANICAL CONNECTION
ZBM 3000
Clamp for wall-mounting - screw-type fitting -
(Material of lower section: TPE Santoprene 10187;
Material of top section: Steel strip DIN 95381-1.4571)
Part No.: 3184630

20 EDS 3400
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ZBM 3100
Clamp for wall-mounting - weld-type fitting -
(Material of welding bridge: QSTE340TM, zinc coating EN 12329 FE/ZN8/B;
Material of lower section: TPE Santoprene 10187;
Material of top section: Steel strip DIN 95381-1.4571)
Part No.: 3184632
ZBM 3200
Splash guard
(Material: Elastollan S60 A15 SPF 000)
Part No.: 3201919