Argo-Hytos EL8 User manual

EL8_Instructions_Hinweise_Pokyny_19155_1en_de_cz_05/2022
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EN
ARGO-HYTOS s.r.o.
Dělnická 1306, CZ 543 01 VRCHLABÍ
[email protected] + 420 499 403 111
This is the original instruction manual number 19155 _1en_de_cz_05/2022, issued by the manufacturer:
Important! Read the instructions carefully before using the product.
Save the instructions for future reference.
If the instructions of use are lost, new ones can be found on the ARGO-HYTOS website www.argo-hytos.com.
Digital Module Amplifier for Proportional (with feedback)
INSTRUCTION MANUAL FOR THE USE OF
EL8

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Figure 1: Declaration of conformity

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Contents of the instruction manual
Chapter Page
Declaration of conformity 2
1. List of Figures 5
2. List of Tables 5
3. Abbreviations 5
4. Terms and Definitions 5
5. General information 6
5.1 Abstract 6
5.2 Scope 6
5.2.1 Copyright 6
5.2.2 Documents place of storage 6
5.2.3 Warning signs, symbols and notes 6
5.2.4 Safety and liability 7
5.2.5 General information 8
5.3 Terms and conditions 8
5.4 Delivery state (default setting) 8
5.5 Correct product use 8
5.6 Non-intended product use 8
5.7 Selection and qualification of personnel 9
5.7.1 Inquiries and ordering 9
5.7.2 Service and repair 9
5.7.3 Cleaning, storage, transport 9
5.7.4 Delivery state (default setting) 9
5.8 Introduction 10
5.9 General Applications 10
5.10 Software version attribution 10
6. Product overview and description 10
6.1 Technical features 10
6.2 Technical data 10
6.3 Hardware-Block Diagram (for operation mode 04) 11
6.4 Ordering Code 11
7. Installation 11
7.1 Mounting 11
7.2 Connection 12
7.2.1 General recommendations 12
7.2.2 Wires and preparation 12
7.2.3 EMC 12
7.2.4 Specific recommendations for wiring and control cabinets 13
7.3 Pin assignment 16
7.3.1 Standard Version Mode 3 and Mode 4 16
7.3.2 Pictures of connectors 16
7.4 Connectors for PRL2 16
8. Commissioning 17
8.1 Front elements 17
8.2 Parameter setting 17
8.3 Operation modes 18
8.4 Description of software program 18
8.4.1 General availability and assignment of parameters 18
8.4.2 Programmable set points (S1.01, S1.02) 18
8.4.3 Analog set point (S1.06) 18
8.4.4 Ramp function (r1.01 to r1.04) 19
8.4.5 Examples for ramps 19
8.4.6 Characteristic curve (C1.02) 19
8.4.7 Direction dependent amplification (C1.03, C1.04) 19
8.4.8 Set value sign / factor (C1.05) 19
8.4.9 Offset for set point (C1.06) 20
8.4.10 Spool overlap compensation (C1.07, C1.08) 20
8.4.11 Sensor adjustment (C1.09, C1.10, C1.11, C1.26, C1.36) 20
8.4.12 P-portion, PT1-portion (C1.13, C1.16) 20
8.4.13 I-portion, I-portion limiter (C1.17, C1.33) 21
8.4.14 D-portion, DT1-portion (C1.18, C1.19) 21
8.4.15 Additional (P-) multiplier (C1.20) 21
8.4.16 Comparator (C1.21 to C1.25, E18) 22

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8.4.17 Set value dead-band (C1.27) 22
8.4.18 Semi-automatic calibration for Fb1 (C1.39, C1.40) 22
8.4.19 Push – pull / Short circuit, over current and open loop detection (E02) 23
8.4.20 Type of ramp (E08) 23
8.4.21 Output stage parameters (E1.03 to E1.07, E1.10, E09) 23
8.4.22 Initial current (E11, E12) 23
8.4.23 Dither signal (E1.13, E1.14) 24
8.4.24 Activation of set points (E17) 24
8.4.25 Display (d1.01 to d1.13) 24
8.5 Other parameters 24
8.5.1 Selection of controller (C1.00) 24
8.5.2 Safety function (C1.01) 24
8.5.3 Operation mode (E00) 24
8.5.4 Selection of set point (E15) 24
8.5.5 Selection of digital output signal; Error / Comparator (E18) 24
8.5.6 Password (E21) 25
8.6 Evaluation of the current controller parameters 25
8.7 Block structures 25
8.7.1 Set points 25
8.7.2 Processing of set points 25
8.7.3 Solenoid current processing and outputs 25
8.7.4 Controller structure 25
8.8 Software block diagram 26
Mode 3, valve with 2 solenoids and spool position feedback (EL8) 26
9. Functions 28
9.1 Display parameter 28
9.2 Output stages 28
9.3 Control circuits with feedback signal adjustment 28
9.3.1 Adjustment of the actual value signal Fb1 28
9.3.2 Standard controller setting (C1.00, C1.01) 29
9.3.3 Remote loop control 29
9.3.4 Direct feed forward controller (dff) 30
10. Inputs, outputs and messages 30
10.1 General 30
10.2 Supply 30
10.3 Enable 30
10.4 Fault (error) 30
10.5 Display and error messages 30
11. USB-C interface 31
11.1 General 31
11.2 Physical interface data 31
11.3 Parameterization Tool 31
12. Complete parameter list 32
13. Contacts to manufacturers, distributors, service, repairs department, complaints department 34
Follow–up documents:
Product catalogue EL8_ha9155

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1 List of Figures
Figure no. Description
Figure 1 Declaration of conformity
Figure 2 Hardware block diagram
Figure 3 Ordering code
Figure 4 Dimensions assembly rail (DIN hat rail)
Figure 5 EMC – interferences and remedies
Figure 6 EMC – adequate design of switchgear cabinets and facilities
Figure 7 Connectors
Figure 8 Connectors for PRL2
Figure 9 Front view of unit
Figure 10 Diagram function C1.13 / C1.15 / C1.16
Figure 11 Parameterization Tool screen
Figure 12 AH Hub working area screen
Figure 13 AH Hub Parameter editing
Table no. Description
Table 1 List of figures
Table 2 List of tables
Table 3 Abbreviations
Table 4 Terms and definitions
Table 5 Identifiers
Table 6 Technical Data
Table 7 Terms and definitions
Table 8 Pin assignment
Table 9 Front elements
Table 10 Parameter overview
Table 11 Operation modes
Table 12 Feedback sensor selection
Table 13 Semi-automatic feedback calibration procedure
Table 14 E02 selection
Table 15 E17 selection
Table 16 Display parameters
Table 17 Feedback signal adjustment
Table 18 Controller selection
Table 19 Switching controller status
Table 20 Error list
Table 21 Parameter list
3 Abbreviations
Abbreviation Description
EL8 Electronic control unit 8
EMC Electro Magnetic Compatibility; properties of the unit in order to comply with the EMC directive
USB Universal Serial Bus; interface for communication between a PC and the EL8
PC Personal Computer
µC Micro Controller; CPU used inside the unit to control all functions
mamsl meters above median sea level
IP65 Protection Class; solid particle protection and protection level against water ingress
LED Light Emitting Diode
PWM Pulse Width Modulation; method to control the output current at low power losses
Ub Supply voltage
FS Full Scale
Term Description
Amplifier module Amplifier for proportional valves which has modular structure
AH Hub Software tool provided by Argo-Hytos in order to adjust and parametrize EL8 units
CANopen Bus interface for digital communication
USB-C connector Connector type used on the USB interface
4 Terms and Definitions
2 List of Tables
Table 1: List of figures
Table 2: List of tables
Table 3: Abbreviations
Table 4: Term and Definitions

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5 General information
This document describes the function of the Argo-Hytos electronic control unit 8 “EL8”.
This manual was prepared with great care and the contents reflect the author’s best knowledge. However, the possibility of error remains and
improvements are possible. Please feel free to submit any comments regarding errors or possibly incomplete information to Argo-Hytos GmbH.
DANGER!
Read this manual carefully before working with the electronic control unit 8!
The general and especially the safety instructions of this manual have to be observed in any case!
Electronic equipment of all kind can have component failures or software may lead to unpredictable
reactions. Secondary safety measures must be taken in order to ensure safety under all circumstances.
This is especially the case for safety critical applications.
Furthermore, it is the responsibility of the user to always comply with applicable safety standards
(e.g. EN 13849) and to implement a system architecture capable to cover all safety requirements. The unit
itself does not comply with and performance level given in EN 13849 or any SIL level as per EN 61508.
Applicable laws and safety standards have to be observed at any time. Before commissioning or using the
equipment the necessary risk analysis must be conducted and suitable protection measures must be taken.
Argo-Hytos GmbH refuses any liability in case of omission to comply with these requirements
With the help of this document a professional, competent and trained user should be able to install, wire, connect, commission, set parameters,
perform fault analysis and fix issues. Also the document will provide the user any technical and operational details necessary to safely operate the
product. It remains the users responsibility to set-up a safe working environment while operating the product.
The information contained in this manual is valid at the time of this version‘s release. See footer for version number and release date of this manual.
It is applicable for “EL8” Electronic control unit 8 with software version V1.02* or higher.
5.2.1 Copyright
© All rights reserved. Except for the usual review purposes, no part of this work may be reproduced or transmitted in any form or by any means,
electronic or mechanical, including photocopy, recording, or any information retrieval system, without the written permission of Argo-Hytos GmbH
(following referred to as Argo-Hytos).
5.2.2 Documents place of storage
This manual and all other associated documentation for hardware and software must always be kept in a location where they will be readily
accessible and close to the digital amplifier module EL8 or the equipment in which it is installed.
5.2.3 Warning signs, symbols and notes
DANGER Identifies safety instructions that are intended to warn of an immediate and impending danger to life and limb.
Failure to observe these safety instructions will inevitably lead to death, serious personal injury (disablement)!
WARNING Identifies safety instructions that are intended to warn of potential danger to life and limb.
Failure to observe these safety instructions might lead to death, serious personal injury (disablement)!
CAUTION Identifies safety instructions that are intended to warn of slight personal injury.
Failure to observe these safety instructions might lead to slight personal injury
NOTICE Failure to observe this safety notice can result in property damage!
5.1 Abstract
5.2 Scope

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Identifiers important information
Identifier Description
•/ - Listings
□References to another chapter, page, table or figure in this manual
blue text Hhyperlink within the document
1., 2., … Steps in a procedure that should be performed in consecutive order
'STATE' States of a state machine
«ES» LEDs of the amplifier (for example, «ES»)
< > parameter name
"…" Used for references
Other identifiers (when applicable):
5.2.4 Safety and liability
NOTICE
The information in this document is subject to change without further notice.
Argo-Hytos assumes no responsibility for any faults that may appear in this manual.
This operating manual represents the knowledge of Argo-Hytos and during the drafting of this operating
manual the greatest possible care was taken. Nevertheless, Argo-Hytos disclaims any responsibility and liability
claims for individual applications of the user. This is particularly true in cases of non-compliance, omissions,
faults, misinterpretations and misunderstandings.
Applicable laws and safety standards have to be observed at any time. Before commissioning or using the
equipment the necessary risk analysis must be conducted and suitable protection measures must be taken.
This manual only describes the functionality and influence of the parameters. The described software
functionality can be used in various amplifier models which can be implemented in a vast range of applications.
Hence it is not possible to assume liability for the influence of the parameters.
Argo-Hytos GmbH refuses any liability in case of omission to comply with these requirements.
WARNING
In the case of applications with critical safety requirements or where accident prevention regulations must be
observed, it may be necessary to isolate the components from the solenoids with relays in e-stop circuits.
To switch off the enable signal (0 V at terminal X3/1) is insufficient. In these cases, hydraulic and/or mechanical
safety measures to stop the drive must be provided (e.g. through switching valves with position monitoring).
WARNING
All types of proportional directional valves, which may be used in all kinds of different environments and
applications, can eventually fail and hence are able to cause damage.
It is the customers obligation to analyze all safety related aspects of the application. It is within the full responsibi-
lity of the machine builder and or system integrator to make the final selection of products and reassure and
confirm that all requirements regarding safety and performance are met.
The procedure of selecting the proper control system and related safety levels is covered by the machine directive
EN 13849.
NOTICE
Liability for any content of this document is rejected!
Any claims against Argo-Hytos GmbH – based on whatever legal reason – resulting from the use of
the information, programs, engineering and performance data etc., described in this document shall be excluded.
Exclusion in such cases shall not apply for mandatory liability, e.g. under the “Product Liability Act”, in case
of intent, gross negligence, or injury of life, body or health, guarantee for the quality of a product, fraudulent
concealment of a deficiency or breach of a condition. Damages for breach of a substantial contractual obligation
are, however, limited to the foreseeable damage, typical for the type of contract, except in the event of intent
or gross negligence or injury to life, body or health. The above provisions do not imply a change of the burden
of proof to your detriment.
We reserve the right to make changes to this document at any time without prior notice.
Table 5: Identifiers

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Malfunctions can occur with the following:
5.2.5 General information
WARNING
ESD (electrostatic discharge) may damage components with the module. In order to prevent any damage please
always follow the recommendations below!
Discharge static voltage from your body by using best practice.
Work in safe environment and do not use any devices in the working surrounding which could generate or hold
static charge. Avoid using the product in areas where floors or surfaces are composed of materials that could
generate static charges.
Handly all equipment very carefully and do not touch exposed pins or components.
Store and transport the units only in its original packaging.
WARNING
During commissioning, particular attention must be paid to the correct design and realization of the wiring. This
must be checked before applying the supply voltage.
To avoid collisions, the safety devices and limit switches must be activated. All safety regulations are to be
observed.
Monitoring the fault signal (terminal X3/2 (10)) is recommended.
› Changes to the settings made by the supplier.
› Neglecting of operating parameters (e.g. supply voltage, application of inadmissible signals on inputs or outputs,
ambient conditions, wiring, unsafe loads such as motors, contactors, relays, ohm loads, etc.)
› Faults in series-connected controls components and set points or actual values
› Faults in the subsequent hydraulic components
› Removing of solenoids connections
Please pay attention to our general terms and conditions (available on request).
The product is shipped in a ready-to-use state (default settings). After correct installation and setting of all parameters relevant for the application,
the amplifier module is ready for use.
The digital amplifier modules “EL8” are used for the following applications:
› Controlling of proportional valves (namely directional control valves); with feedback
› To convert set point signals into a current signal to control one proportional valve with two solenoids and a spool position
feedback in the aforementioned valves.
› For industrial applications only.
The operation of other inductive or resistive loads is not recommended (motors, heaters, etc.). If you are considering any applications like this
please contact Argo-Hytos GmbH.
If used correctly, the safety of the user as well as the safe and proper function of the amplifier EL8 is given.
The digital amplifier modules “EL8” should not be used in the following cases:
› if noticeably damaged
› when the electrical connections are damaged
› if they do not function correctly
› after incorrect handling or storage
› in non-appropriate applications or environments.
In these cases, the digital amplifier module must be disabled and secured against accidental restarting.
In the case of applications with critical safety requirements or where accident prevention regulations must be observed, it may be necessary to
isolate the components from the solenoids with relays in e-stop circuits. In these cases, hydraulic and/or mechanical safety measures to stop the
drive must be provided (e.g. through switching valves with position monitoring).
During commissioning, particular attention must be paid to the correct design and realization of the wiring. This must be checked before applying
the supply voltage.
To avoid collisions, the safety devices and limit switches must be activated. All safety regulations are to be observed.
Malfunctions can occur when:
› Changes to the settings made by the supplier.
› Neglecting of operating parameters (e.g. supply voltage, application of inadmissible signals on inputs or outputs,
ambient conditions, wiring, unsafe loads such as motors, contactors, relays, ohm loads, etc.)
› Faults in series-connected controls components and set points or actual values
› Faults in the subsequent hydraulic components
› Removing of solenoid connection.
5.3 Terms and conditions
5.4 Delivery state (default setting)
5.5 Correct product use
5.6 Non-intended product use

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Only qualified users may work with the amplifier. Qualified users are properly trained experts with the required knowledge and experience. In
particular, these experts must have the authorization to bring into operation systems and power circuits in accordance with safety engineering
standards. They must be familiar with safety concepts common in automation.
5.7.1 Inquiries and ordering
To order the product, the complete order code is requested.
See □Chapter „6.4 Ordering code“, page 11
5.7.2 Service and repair
WARNING Do not attempt - under any circumstances - to repair the product yourself
After repair, certain adjustments and test procedures must be performed; this can only be made by qualified and authorized personnel. Products that
need repair can be sent to the addresses:
See □Chapter „5.7.1 Inquiries and ordering“, page 9
Please enclose a detailed description of the error, malfunction or failure with the sent item and state the serial number and the purchase date. This
will speed up the process and guarantees a fast and reliable repair.
See □Chapter „5.7.1 Inquiries and ordering“, page 9
In the case of a fault or a malfunction, your distributor can give you instructions on the phone or in writing before accepting a repair order. For
service and repair, we offer experienced and qualified personnel. In case you need our assistance, please contact the address:
See □Chapter „5.7.1 Inquiries and ordering“, page 9
5.7.3 Cleaning, storage, transport
The product should only be transported and stored in the original packaging to ensure suitable protection against mechanical damage as well as
electrostatic discharge.
› Keep the amplifier module away from moisture and dust
› Observe the allowed storage and transportation temperature range
› If it should be necessary to clean the amplifier, we recommend sending it back to the manufacturer or any distributor and partner:
See □Chapter „5.7.1 Inquiries and ordering“, page 9
CAUTION Unpacking and handling should be left to suitably trained personnel.
Beware of damaging the amplifier by electrostatic discharge
5.7.4 Delivery state (default setting)
The product is shipped in a ready-to-use state (default settings). After correct installation and setting of all parameters relevant for the application,
the digital amplifier module is ready for use.
The digital amplifier module EL8 features leading edge technology. This electronic device meets the industrial standards for EMC. This ensures a
high interference security and low interference emission.
The performance characteristics are possible through the use of the most current microprocessor technology (32 bit floating point CPU) combined
with other state of the art components. In addition to all control functions, the microprocessor also handles closed-loop control. The system
features are essentially determined by the software and provide reserve capacity for further developments and adaptations.
The following features distinguish the EL8 series:
› fully digitized amplifier module with the advantage of
- no on-board potentiometer
- no jumper settings required
- digital setting and display of all parameters by means of PC with AH Hub
- user safety during parameterization
› flexible and reliable system:
- use of a modern 32 Bit floating point µC
- high performance and yet power reserve
- high reliability and safety through the use of a integrated watch-dog and reset function
- variable settings for magnetic systems making high flexibility possible
› functional use of the interface:
- change of selected parameters “on-the-fly” without interference or interruptions of the working cycle
- analyzing of system performance through selection of display parameters with the PC and by using the 4-channel oscilloscope
function included in AH Hub
- bus interfaces available (PROFIBUS/PROFIDRIVE, PROFINET, ETHERNET/IP, CAN-OPEN)
5.7 Selection and qualification of personnel
5.8 Introduction

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6. Product overview and description
› External electronics for DIN rail is designed for control of single or double solenoid hydraulic valves in open or closed loop with spool
position feedback
› The electronics continuously control the position of the valve spool proportional to the size of the input signal with minimal hysteresis
› The output control current for the solenoid coil is independent of temperature changes and changes in load impedance
› Control of the coil using a PWM signal reduces the hysteris characteristics of the valve and optimizes the accuracy of spool positioning
› At the core of the reliable and flexible electronics is a 32-bit processor with high performance reserve.
› The electronics are resistant to transmission errors. Intergrated algorithm for error correction prevents signal distortion during data
transmission or storage
The amplifier module EL8 is used for
› proportional directional valves direct and pilot operated with feedback
› proportional flow control valves with feedback
› proportional cartridge valves with feedback
› proportional pressure reducing valves with feedback
› proportional pressure regulating valves with feedback
› cartridge valves with feedback
› all kinds of valves used in applications with process value feedback (e.g. cylinder position, pressure, velocity, rpm, etc.)
For versions to be used in open loop applications please contact your distributor or Argo-Hytos GmbH for further information.
This manual is applicable for EL8 with software version V1.02* or higher!
The correct connection is shown in the connection diagram.
See □Chapter „7.4 Connectors for PRL2“, page 16
Electrical connection 16 (4 x 4) connecton pins 0,2 …2,5 mm2)
Phoenix Combicon MSTBT 2,5/4-ST
Processor resolution bit 32-bit
Resoloution of A/D converters bit 16-bit
PWM frequency kHz up to 22,2
Connection for parameterization USB-C
Recommended cable cross section For power supply: 1.5mm2(AWG16) for power suppply and coil; max. length = 50 m,
For control signal : 0.5mm2with maximum length = 50 m.
Cycle rate ms 0,1
Nominal coil voltage STD V DC 12 24
Nominal coil voltage PRL V DC 24 (+/- 10 %)
LED signalization Multi-colour status LED: Green = Working fine Yellow = Active input „ENABLE“
Red = Error
Compensated temperature °C (°F) -40 ... +85 (-40 ... 185)
Operating temperature °C (°F) -40 ... +70 (-40 ... 158)
Air humidity max. 95 % (uncondensed)
Casing material PA 66 - FR
Dimensions mm (in) 22,5 x 100 x 114 (0.89 x 3.94 x 4.49) [š x v x h (W x H x D)]
Weight kg (lbs) 0,13 (0.287)
EMC resistance EMC 2014/30/EU
Degree of coverage IP20
Electrical parameters
Supply voltage STD V DC 10,8 … 28,8
Supply voltage PRL V DC 21,6 ... 28,8
Analogue input signal ±10 V DC ; 4…20 mA
Analogue input signal for feedback ±10 V DC ; 4…20 mA
Input impedance (voltage; current) U = 200 kΩ ; I = 255 Ω
Digital output signal 2x PWM = 0,8 … 3,5 A
Number of digital inputs 3 (S1.01; S1.02; ENABLE)
6.1 Technical Features
6.2 Technical Data
5.9 General Applications
5.10 Software version attribution
Table 6: Technical Data

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6.3 Hardware-Block Diagram (for operation mode 04)
Numbers in brackets do indicate numbers printed on the connectors!
6.4 Ordering Code
Electronic control unit EL8
Version
standard
PRL2 version
Total number of variants:
12 / 24V DC; STD / PRL
EL8-STD
EL8-PRL (only with 24V coil!)
7. Installation
› Compare module type (refer to label on side of the module)
with part list / diagram
› The module can be mounted in any direction. Vertical is preferred for
better convection cooling
› The module should be mounted in a shielded environment
(e.g. control cabinet)
› The module has to be mounted on a assembly rail (EN50022)
7.1 Mounting
Figure 2: Hardware block diagram
Figure 3: Ordering Code
Figure 4: Dimensions assembly rail (DIN hat rail)
CPU
Error
(Comparator)
PWM
+ 24 V Ena
ENTR_B
Cur. B (I )
B
PWM_B
Solenoid B
PE
PE connection at housing to DIN rail
Enable
X3/1 (9)
PWM
+ 24 V Ena
ENTR_A
Cur.A(I )
A
PWM_A
Solenoid A
USB-C
interface
+ Power Supply
24 V (12 .... 33 V)
0 V
DC =
DC =
Feedback Fb1-
Feedback Fb1+
U/I
s
Supply +
Signal
Valve
Supply GND
X2/
3
X2/
4
Set Point S1.06 +
Set Point S1.06 -
Set Point S1.01
Set Point S1.02
X2/1 (5)
X2/2 (6)
0…
+ - 10 V; 0 ... 10 V, differential
6 ... +- 2.5 V; 7.5 ... +-2.5 V; 6 ... +- 4 V; 5 ... +- 3 V; 5 ... +- 2.6
V, differential
0 ... 20 mA;
4…20 mA; 10 ... +- 10 mA; 12 ... +- 8 mA
(cable fracture detection selectable where applicable
)
X2/3 (7)
X2/4 (8)
X3/3 (11)
X3/4 (12)
X1/3 (3)
X1/4 (4)
X3/2 (10)
X1/2 (2)
X1/1 (1)
X4/3 (15)
X4/4 (16)
0…+ - 10 V; 0 ... 10 V; 5 V ... +- 5 V; 5 V ... +- 4.5 V, differential
0 ... 20 mA; 4…20 mA; 10 ... +- 10 mA; 12 ... +- 8 mA
(cable fracture detection selectable where applicable)
EL8 -
STD
PRL
Dimensions assembly rail:

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The general supply voltage for the unit is at the terminals:
X4/3 (15) = 0 V and X4/4 (16) = +UB is 18 V to 28V DC, residual ripple <10%.
Operation at supply voltage down to 12 V DC is also possible. In this case some limitations may be applicable.
Output stages are electronically protected against over-current and short circuit.
Further-on amplifier modules should be protected with a quick-acting fuse.
The solenoids are connected at the terminals:
7.2.1 General recommendations
X1/1 (1) and X1/2 (2) →solenoid A X1/3 (3) and X1/4 (4) →solenoid B
Connection wires have to comply to the following specifications:
7.2.2 Wires and preparation
Feature Required
Wire type Hookup cable; stranded
Cross section:
Solenoids and supply min AWG 16 / 1.5 mm²
Cross section:
Signal, command and sensor: min AWG 20 / 0.5 mm²
Wire length Max. 50 m (> 50 m consult factory)
Skinning length 7 mm
Soldering of wires Not permitted!
The screw terminals are designed in order to accept all kinds of copper wires. Wires with sleeve can be used as conductor
stripping protection for stranded wires.
For more details refer to Phoenix Contact product catalog.
WARNING
The assembly contains electronic components. Incorrect handling or operation can lead to damage through
electrostatic discharge (ESD). Only trained personnel should work with the unit. All safety instructions must be
observed. Damage may result if the module is disconnected while the power supply is still on. Avoid such actions
under all circumstances. The information in this document is subject to change without notice.
Devices EL8 series are class “A” equipment and therefore only suitable for industrial surroundings.
The distance between a source of interference (device emitting interference) and an interference sink (a device under the influence of interference) is
very important. The greater the distance between the source of interference and the sink, the smaller the effects on the equipment will be. In other
words, the closer a device is placed to the source of interference, the greater the interference amplitudes. For this reason, a minimum gap of 0.25 m
should be kept between the amplifiers and strong sources of interference. The following devices are to be regarded as strong sources of interference:
7.2.3 EMC
› Switching power supply units
› Frequency converters
› Digital drive modules
› Mains filters with wiring (even if shielded)
› AC/DC commutator motors
› Motor cables (even if shielded)
› Switched inductances, even if anti-interference measures have been taken (solenoid valves, contactors, relays, etc.)
One of the most common input points for interference is wiring. If interfering cables are laid at least 0.25 m away from cables susceptible to
interference, the influence on each other can be minimized. Parts of the amplifier wiring may be susceptible to interference (analog set point and
actual value, solenoid cables). If these cables are laid parallel over a distance longer more 10 m, the necessary distance between them must be
increased. Cables susceptible to interference should never be laid parallel to motor cables. The influence is the least when the cables cross particularly
at an angle of 90°.
However, interference can also arise from cables in the amplifier wiring system, in particular solenoid cables.
Examples of devices which are particularly susceptible to interference:
› Office PC’s
› Sensors with small output voltages / currents
› Capacity proximity switches
› Audio equipment (television, hi-fi, radio, etc.)
› Devices which do not meet the EMC guidelines
7.2 Connection
Table 7: Terms and definitions

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The following rules and tips are by no means to be complete. Since various electronic components are used in a variety of different ambient
conditions, these guidelines only represent a compromise. The actual design of the wiring also depends on the interference emission and interference
sensitivity of each individual component.
7.2.4 Specific recommendations for wiring and control cabinets
› Use shielded and twisted-pair cables for the solenoid connections. The shield must be grounded (PE Protective Earth) at both ends.
The capacity should be ca. 120 pF/m. If the cables are up 100 m long, their cross-section has to be 1.5 mm 2 and 2.5 mm 2 for cables
longer than 100 m.
› Shields of digital signal lines are to be connected at both ends to a PE, a good conductivity of the connection should be provided.
› Set point and actual value connections should have shielded and twisted-pair cables. The analog signal line shields are to be connected,
with low impedance, at both ends to PE
› In environments with high interference, use double shielded cables for set point and actual value connections. The inner shield is only
grounded at one end, the outer at both ends.
› In the event of low-frequency interference on the analog signal lines (measured value fluctuations), the shield should be connected
at one end. Preferably, use a corresponding compensation of potential (see also the following point).
› Analog GND (terminal 26z) is the reference point for set point and actual value signals. All set point and actual value transmitters
are to be connected to this terminal to avoid offsets and incorrect measurements.
› Use only cables with a Cu shielding grid and a covering of > 85 %. Avoid screening films. Metal foils must be avoided.
› The shield should not be interrupted along the entire length of the cable. If contactors, safety switches, chokes, etc. have to be used
in the wiring, the installation of a metallic housing with a high HF shield may be necessary.
› Shield terminals are to be connected over a large area to the shield rail to function well.
› The shield rail must be installed close to the cable duct in the control cabinet.
› The metallic parts of the electrical cabinet are to be connected with low impedance on large areas. Make the desired connection
with mechanical aids such as scratch plates if necessary. Connect the doors of the cabinet with the shortest possible homogeneous
tapes (multiple).
› Solenoid valves, contactors, relays, brakes, etc. must be suppressed directly at the interference source. Suitable suppression devices are,
for example, RC networks, diodes or varistors.
› Analog and digital signal lines should preferably enter the control cabinet from only one side.
› Non-shielded lines of an electric circuit must be twisted.
› Auxiliary wires are to be grounded at both ends.
› Avoid unnecessarily long lines. This keeps the coupling impedance low.
› Wiring should preferably not be freely hanging in the cabinet. Lay cables, including auxiliary cables, as close as possible to mounting
plates and cabinet housing.
› In the case of a potential difference between the shield connections, a compensation conductor of <10 mm2should be laid parallel
to the shield to reduce the transient current. A multiple connection of the shield to the cabinet casing and thus PE is generally possible.
Also, a multiple connection of the shield outside the cabinet is possible.
› If filters are installed, place them close to the source of interference and keep a good surface contact to the cabinet or mounting plate.
› If converters are used, converter filters must be provided. Variable speed motors may have to be connected using shielded lines.
All further instructions of the converter manufacturer have to be observed.
The following two pages show illustrations of:
› The most important types of interference and their remedies
› Construction of EMC suitable electric cabinets and systems
The diagrams have been provided by our competent partners for all questions regarding EMC:
NKL GmbH
Birckichstr. 15
D-74549 Wolpertshausen
Tel.: (+49) 7971 - 96810
Fax.: (+49) 7971 - 968150
WARNING Avoid under all circumstances to use logical signals from the module (i.e. “Error”) for switching machine safety
circuits (refer also to EU standard EN13849)!

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The most important types of interference and remedies:
Symmetrical interference:
source of
interference
potentially
susceptible
equipment
ground
capacitance
ground
capacitance
Symmetrical interference currents flow simultaneously from the source of
interference and back via the interconnecting lines connected (differential-mode
interference). Symmetrical interferences are independent of the groud capacitance.
Typical sources of symmetrical interferences:
All types of rectifiers, thyristor controls such as e.g. generalized phase controls, semiconductor relays, etc.
In practice, symmetrical interferences occur mainly as conducted interference in the lower frequency range
up to abunt 1 MHz.
Cx
source of
interference
potentially
susceptible
equipment
ground
capacitance
ground
capacitance
Symmetrical interferences are suppressed by:
› capacitors between the terminals („X” capacitors):
they short-circuit the interference currents just before they reach the potentially susceptible equipment.
› single chokes in the current path of the incoming and outgoing lines. These chokes are effective for symmetrical
interferences and increase the impedance of the symmetrical interference circuit.
capacitor between conductors
Figure 5: EMC – interferences and remedies
single choke

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EMC adequate design of switchgear cabinets and facilities
All devices with a metal housing or a connector for PE should be connected properly, i.e. short and with a large contact area to the mounting plate
of the cabunet or the chassis of the machine to ensure a proper potential equalisation.
For that the insulation of the mounting plate has to be removed, especially below power drive systems and their respective filters.
The best solution is to use a conducting mounting plate that is zinc coated.
Lay the power
cable to the
inverter
separately!
Place the power line filter for
the whole enclosure as close
as possible to the entry of the
power line!
Do not lay the power line
through the whole enclosure
until it is connected to the
filter!
Connect the PE directly to the
cabinet and the mounting
plate at the entry!
Shields should be
connected directly
to the ground at
the entry into the
enclosure!
Shields of analog
signal lines (e.g. PT
100) should be
connected only at
the end where the
device is located that
receives the signal.
Chassis of machine
(symbolic)
Shields of digital signal - or
data transmission lines should
be connected at both ends!
Install separate earth wire so that
compensatingcurrents do not
have to flow only ower the cable
shields!
If a shielded motor
cable is used and
properly connected at
both ends, the output
filter may not be
necessary!
Output filter for
inverter needed if
no shielded motor
cable is used!
Signal & data lines
should be laid
separately from
power cables!
Figure 6: EMC – adequate design of switchgear cabinets and facilities

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7.3.1 Standard Version Mode 3 and Mode 4
Connector X1 Terminal X1/1 (1) Terminal X1/2 (2) Terminal X1/3 (3) Terminal X1/4 (4)
Solenoid A- Solenoid A+ Solenoid B- Solenoid B+
Connector X2 Terminal X2/1 (5) Terminal X2/2 (6) Terminal X2/3 (7) Terminal X2/4 (8)
Set point 1 (S1.01) Set point 2 (S1.02) Feedback Fb1- (Sensor Input) Feedback Fb1+ (Sensor Input)
Connector X3 Terminal X3/4 (12) Terminal X3/3 (11) Terminal X3/2 (10) Terminal X3/1 (9)
Set point S1.06-(Analog Input) Set point S1.06+(Analog Input) Error / Comp. Enable
Connector X4 Terminal X4/4 (16) Terminal X4/3 (15) Terminal X4/2 (14) Terminal X4/1 (13)
Power supply + 24 V Power supply 0 V N/C N/C
7.3.2 Pictures of connectors
Pictures of connectors with numbering 1 to 16:
X1 / X2 X3 / X4
Signal Contact - conductor colour
Output from inverting sensor 1 - black
Output from non-inverting sensor 2 - green
Power supply sensor 24 V 3 - red
Power supply sensor 0 V 4 - white + shading
Input 1 for linear motor PRL2 (+) 5 - bright white
Input 2 for linear motor PRL2 (-) 6 - bright red
PRL2 Valve connector pin Description EL8 pin Description
- - X1/1 Not connected
6 OUT- X1/2 Input 2 for linear motor PRL2 (-)
- - X1/3 Not connected
5 OUT+ X1/4 Input 1 for linear motor PRL2 (+)
- - X2/5 AGND (Analog Ground)
- - X2/6 Ana Out, analog output (Signal defined by parameter E 01)
2 IN+ (LVDT reference U/2) X2/7 Output from non-inverting sensor
1 IN- (LVDT actual value) X2/8 Output from inverting sensor
- - X3/9 Enable input, activation of the output stages
- - X3/10 Error output, all ok →24V
- - X3/11 Setpoint, S1.06+ / IN+
- - X3/12 Setpoint, S1.06- / IN-
4 0V X4/13 Power supply sensor 0V
3 Ucc X4/14 Power supply sensor 24V
- - X4/15 EL8 Supply 0V
- - X4/16 EL8 Supply 24V
Please pay attention to the correct polarity of the feedback connection!
FB1- FB1+ Ana Out AGND
I Stage+
n/c
I Stage-
n/c
S1.06- S6.06+ Error Enable
Ucc 24V
Ucc 0V
LVDT Ucc 24V
LVDT Ucc 0V
7.3 Pin assignment
7.4 Connectors for PRL2
Table 8: Pin assignment
Figure 7: Connectors
Figure 8: Connectors for PRL2
Table 9: Front elements
1
2
3
4
5
6
78 (3.07)
8765
X2
4321
X1
12 11 10 9
X3
16 151413
X4

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8 Commissioning
WARNING
The electrical wiring must be checked before switching on the supply voltage. Limit switches and safety devices
must be activated to avoid uncontrolled movements. Carefully follow relevant safety regulations. Suitable
emergency stop measures must be taken.
X2
X1
Element Function
Status LED’s display of status
USB-C interface
For setting of parameters via PC
or communications to machine.
Also for diagnosis function with
oscilloscope built into AH Hub
Available parameters for version EL8:
display Set point / ramps Controller Extended
d1.01 S1.01 C1.00 E00
d1.02 S1.02 C1.01 E02
d1.03 r1.01 C1.02 E03
d1.04 r1.02 C1.03 E04
d1.05 r1.03 C1.04 E05
d1.06 r1.04 C1.05 E06
d1.07 C1.06 E07
d1.08 C1.07 E08
d1.09 C1.08 E09
d1.10 C1.09 E10
d1.11 C1.10 E11
d1.12 C1.11 E12
d1.13 C1.12 E13
C1.13 E14
C1.14 E15
C1.15 E17
C1.16 E18
C1.17 E19
C1.18
C1.19
C1.20
C1.21
C1.22
C1.23
C1.24
C1.25
C1.26
C1.27
C1.33
C1.36
C1.37
C1.38
C1.40
L1
A complete list of parameters is available. Refer to:
See Chapter „12 Complete parameter list“, page 32
8.1 Front elements
8.2 Parameter setting
Figure 9: Front view of unit
Table 10: Parameter overview
X4
X3
Multi-colour status LED:
Green = Working fine
Yellow = Active input „ENABLE“
Red = Error
Interface USB-C

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The setting of parameter E00 is determining which operation mode is activated. This parameter is factory preset!
Only the mode relevant parameters are made available for each of the modes.
Mode Description / Module Version
3 Closed loop, 1 proportional valves with 2 solenoid and one valve feedback (version EL8-xxx)
8.4.1 General availability and assignment of parameters
In operation mode 3, all set points (analog and digital →S1.06, S1.01, S1.02) are assigned to one functional branch. The other analog input is used
as feedback input (Fb1).
In the standard setting with parameter C1.05 = + 1.00 , all positive set points activate solenoid B and all negative set points activate solenoid A.
Parameter C1.05 = -1.00 inverts this assignment and with parameter C1.05 = 0.00, all set points are deactivated.
WARNING Only trained staff should make changes of the parameters. While adjusting, the drive should be switched off.
Every parameter change is immediately effective
8.4.2 Programmable set points (S1.01, S1.02)
W
digital
S1.01 S1.02
Digital set points are internal programmable set points, activated by digital inputs. Two of these programmable set points can be selected with the
respective input. These set points are assigned and saved in parameters S1.01 and S1.02.
› The inputs can be controlled directly from the PLC.
› If electrical isolation between the PLC and the amplifier is required than external means of isolation must be applied.
› Both digital set points are passed through the ramp function generator.
› All set points are additive and include the direction information themselves.
› If several set points are selected at the same time, the sum of these set points is subsequently processed.
› With binary combinations a total of 4 values can be selected.
8.4.3 Analog set point (S1.06)
W
Analog
S1.06
› The set point S1.06 is designed for voltage and current signals (differential input). Resolution of input: 16 bit.
Signal range is: 0 ... ± 10 V or 0 ... 20 mA or 10 mA ± 10 mA or 4 ... 20 mA or 12 mA ± 8 mA
selection of cable fracture detection for current input and selection of set point type by means of parameter E15.
› If for S1.06 the current range is selected than a measuring resistance of 255 Ωis automatically activated.
› In case of activated cable fracture detection a current below the trigger level will switch off the amplifiers enable signal and the error
output will automatically drop to 0 V. At the same time the status LED will lit in red.
› When a current input is selected than the inputs are monitored for over-current. If an over current should occur than the input is
automatically switched off in order to prevent damages to the input. At the same time the enable is switched off and the error output
will drop to 0 V and the status LED will lit in red.
› The set point is passed through the ramp function generator (ramp) if E08 = 1. If parameter E08 = 0, than the analog set point bypasses
the ramp function.
› The set point S1.06 is calculated according to the polarity with the other set points.
› The input for S1.06 is designed as a differential input within the operating voltage range of ± 15 V.
› The signal for set point S1.06 must be standardized to ± 10 V otherwise the A/D converter is overloaded.
› In case of usage of current input signals the inputs are protected for overload. An error will be triggered at currents above approx. 25 mA.
Cable fracture detection if activated will trigger an error for currents below approx. 2 mA. For information about error codes refer to:
See Chapter „10.5 Display and error messages“, page 30
To suppress interference, an unused analog set point S1.06 must be deactivated with parameter E17.
The analog set point S1.06 is not a real parameter; it represents external set points.
8.3 Operation modes
8.4 Description of software program
Table 11: Operation modes

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8.4.4 Ramp function (r1.01 to r1.04)
r1.01 to r1.04 Set points are integrated accordingly to the ramp function generator. For each change of direction, the ramp time can
be set independently. Times from 0 to 39.5 s can be set. The resolution is 0.01 s.
The ramp characteristic is assigned as follows:
r1.01 ramp from 0 to negative values
r1.02 ramp from negative values to 0
r1.03 ramp from 0 to positive values
r1.04 ramp from positive values to 0
E08 = 0 effects only digital set points, constant time base and linear
E08 = 1 effects all set points, constant rise rate and linear
E08 = 2 selectable ramp times
ramp function can be switched
The input S1.01 selects ramp r1.01 and r1.02.
The input S1.02 selects ramp r1.03 and r1.04.
If S1.01 and S1.02 are offline, no ramp is activated.
If both, S1.01 and S1.02 are online, ramp r1.01 and r1.02 are activated.
The selected parameters S1.01 and S1.02 are still active and must be set to 0 if they should not be used.
8.4.5 Examples for ramps
Example 1:
E08 = 0, ramp with constant time base
S1.01 = 8.00 V; S1.02 = 2.00 V; r1.03 = 4.00 sec
Example 2:
E08 = 1, ramp with constant rise rate
S1.01 = 8.00 V; S1.02 = 2.00 V; r1.03 = 4.00 sec
The analog set pointS1.06 is excluded from the ramp function. The ramp influences the digital set points S1.01
and S1.02 as well as the Analog set point S1.06
8.4.6 Characteristic curve (C1.02)
There are five characteristic curves available for the linearization of the valves characteristics:
Curve #1: general linearization for NC curve
Curve #2: linearization for proportional directional valves with flow characteristic > 10 l/min (size 06)
Curve #3: linearization for proportional directional valves with flow characteristic ´ 10 l/min (size 06)
Curve #4: linearization for proportional directional valves with flow characteristic > 50 l/min (size 06)
Curve #5: linearization for proportional pressure valves
8.4.7 Direction dependent amplification (C1.03, C1.04)
The amplification can be programmed with the parameters C1.03 and C1.04, for both directions, “+” and “-”. These parameters
are used for amplification adjustment (e.g. balance the speed of differential cylinders).
8.4.8 Set value sign / factor (C1.05)
The set value sign and factor function is used to exchange the polarity sign of the set points or to adapt the signal or in order to
completely deactivate the signal. This enables to change the direction of a valve as well as the scaling of the set point signals.
Scaling for the set point is in the range of 0.00 … ± 4.00.
C1.03, C1.04
-V
T
0
r1.02
r1.01 V
T
0
r1.04
r1.03
4,0 t [s]
S1.01
S1.02
4,0 t [s]
9,999
S1.01
S1.02
3,20,8
9,999
C1.02
C1.05

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8.4.9 Offset for set point (C1.06)
A drift of the drive or the hydraulic system can be corrected with the offset parameter.
The offset-set point can be regarded as an additional set point. This allows a very fine positioning of the system e.g. if it is used on
a NC axis.
8.4.10 Spool overlap compensation (C1.07, C1.08)
These parameters compensate a possible spool overlap independently for each solenoid. The compensation works as an additional
set point that is activated as soon as the polarity of the set point changes. Overlaps of valve are empirically around 10 % to 15 %
of full stroke (depending on manufacturer and valve type!). The setting has a decisive effect on the quality (precision and speed)
when positioning the axis drives. The amplification in the small signal range is essentially determined by this function.
The pre-set value is directly applied as a current on the solenoids. The programming is standardized in volt, 10 V equals the
maximum set current.
C1.07, C1.08
8.4.11 Sensor adjustment (C1.09, C1.10, C1.11, C1.26, C1.36)
C1.09, C1.26
Selection Input signal range Wire monitor Comment
1 0 ... 20 mA No ---
2 4 ... 20 mA Yes ---
3 12 mA ± 8 mA Yes ---
4 0 ... 10 V No ---
5 0 ... ± 10 V No ---
6 6 V ± 2,5 V Yes ---
7 7,5 V ± 2,5 V Yes ---
8 6 V ± 4 V Yes ---
9 7,5 V ± 2,5 V Yes ---
10 0 ... 20 mA No With selection
10, 11 and 12:
Only positive controller output
possible!
11 4 ... 20 mA Yes
12 0 ... 10 V No
› Feedback 1 input is designed for voltage and current signals (differential input). Resolution of Analog input: 12 bit.
Signal range is: 0 ... ± 10 V or 0 ... 20 mA or 10 mA ± 10 mA or 4 ... 20 mA or 12 mA ± 8 mA)
selection of cable fracture detection for current input by means of parameter C1.26.
› If for Fb1 the current range is selected than a measuring resistance of 255 Ωis automatically activated.
› In case of activated cable fracture detection a current below the trigger level will switch off the amplifiers enable signal and the error
output will automatically drop to 0 V. At the same time the Status LED is lit red.
› When a current input is selected than the input is monitored for over-current. If an over current should occur than the input
is automatically switched off in order to prevent damages to the input. At the same time the enable is switched off and the error output
will drop to 0 V and the Status LED is lit red.
› The feedback 1 input is designed as a differential input within the operating voltage range of ± 15 V.
› The selections 10 to 12 are for control loops where no negative value appears; therefore no negative controller output is possible
(e.g. pressure control loops).
› If a sensor signal shows different gains or asymmetrical behavior than compensation can be done by means of parameter C1.36.
Sensor gain for positive and negative signals can be adjusted independently.
› In case of usage of current input signals the inputs are protected for overload. An error will be triggered at currents above approx. 25 mA.
Cable fracture detection if activated will trigger an error for currents below approx. 2 mA.
For information about error codes refer to:
See Chapter „10.5 Display and error messages“, page 30
8.4.12 P-portion, PT1-portion (C1.13, C1.16)
C1.13 C1.15 C1.16 C1.14, C1.16 When programming the parameters C1.13 and C1.16
then also the setting of parameter C1.00 (controller
setting) is of importance.
If C1.00 = 3 or C1.00 = 4 (dff controller), than C1.13 is
the amplification of the dff controller and C1.16 is the
P-amplification of the remaining PT1-I-DT1 controllers.
C1.15 will be without effect in these cases
Table 12: Feedback sensor selection
C1.06
C1.10 C1.11 C1.36
The following types of sensors are available: