Leuze electronic MSI 400 Series User manual

Translation of the original operating instructions
DE 2017/11 - 50134711 We reserve the right to make technical changes
MSI 400
Hardware

© 2016
Leuze electronic GmbH & Co. KG
In der Braike 1
D-73277 Owen / Germany
Phone: [phone]
Fax: [phone]
http://www.leuze.com
[email protected]
Leuze electronic MSI 400 2

Table of Contents
Leuze electronic MSI 400 3
Table of Contents
1 About this manual.................................................................................................6
1.1 Function of this document....................................................................................................... 6
1.2 Target group ........................................................................................................................... 6
1.3 Information depth.................................................................................................................... 6
1.4 Scope of validity and applicable documents........................................................................... 7
1.5 Abbreviations used ................................................................................................................. 7
1.6 Symbols/icons and writing style/spelling standard used......................................................... 7
1.7 Copyright and right to make changes ..................................................................................... 8
2 Safety .....................................................................................................................9
2.1 Qualified persons.................................................................................................................... 9
2.2 Areas of application of the device........................................................................................... 9
2.3 Proper use ............................................................................................................................ 10
2.4 General safety information and protective measures ........................................................... 11
2.5 Environmentally friendly behavior......................................................................................... 12
2.5.1 Disposal.............................................................................................................................12
2.5.2 Sorting of materials ...........................................................................................................12
3 Product description ............................................................................................13
3.1 System properties................................................................................................................. 13
3.2 System setup ........................................................................................................................ 14
3.3 Version, compatibility, and features...................................................................................... 15
3.4 Controller module MSI 410 ................................................................................................... 16
3.4.1 Description ........................................................................................................................16
3.4.2 Display elements, interfaces, and terminal description .....................................................16
3.4.3 Internal circuits ..................................................................................................................18
3.4.4 Limited short-circuit detection in the input circuits.............................................................18
3.4.5 Deactivating the test pulses at the outputs........................................................................19
3.4.6 Single-channel use of outputs ...........................................................................................19
3.5 Controller module MSI 420 ................................................................................................... 20
3.5.1 Description ........................................................................................................................20
3.5.2 Display elements, interfaces, and terminal description .....................................................20
3.5.3 Internal circuits ..................................................................................................................22
3.5.4 Limited short-circuit detection in the input circuits.............................................................22
3.5.5 Deactivating the test pulses at the outputs........................................................................23
3.5.6 Single-channel use of outputs ...........................................................................................23
3.6 Controller module MSI 430 ................................................................................................... 24
3.6.1 Description ........................................................................................................................24
3.6.2 Display elements, error codes, and terminal description...................................................24
3.7 MSI-SD-CARD removable storage ....................................................................................... 25
3.7.1 Description ........................................................................................................................25
3.7.2 Files on the removable storage .........................................................................................25
3.8 MSI-EM-IO84 input/output expansion module...................................................................... 27
3.8.1 Description ........................................................................................................................27
3.8.2 Display elements and terminal assignment.......................................................................27
3.8.3 Internal circuits ..................................................................................................................29
3.8.4 Deactivating the test pulses at the outputs........................................................................30
3.8.5 Single-channel use of outputs ...........................................................................................30
3.9 MSI-EM-I8 input expansion module...................................................................................... 31
3.9.1 Description ........................................................................................................................31
3.9.2 Display elements and terminal assignment.......................................................................32
3.9.3 Internal circuits ..................................................................................................................33

Table of Contents
Leuze electronic MSI 400 4
3.10 MSI-EM-IO84NP input/output expansion module................................................................. 34
3.10.1 Description ........................................................................................................................34
3.10.2 Display elements and terminal assignment.......................................................................35
3.10.3 Internal circuits ..................................................................................................................36
4 Connecting devices ............................................................................................38
4.1 Safety command devices and electromechanical safety switches ....................................... 40
4.1.1 Emergency stop button .....................................................................................................40
4.1.2 Electromechanical safety switch without lock....................................................................41
4.1.3 Electromechanical safety switch with lock.........................................................................41
4.1.4 Enable switch ....................................................................................................................42
4.1.5 Two-hand control...............................................................................................................43
4.1.6 Safety mats and bumper ...................................................................................................43
4.1.7 Connection of multiple safety mats/bumpers ....................................................................45
4.1.8 Mode selection switch .......................................................................................................45
4.1.9 Potential-free contacts.......................................................................................................45
4.2 Contactless safety sensors................................................................................................... 46
4.2.1 Magnetic safety switches ..................................................................................................46
4.2.2 Inductive safety switches...................................................................................................47
4.2.3 Transponder switches .......................................................................................................47
4.3 Testable single-beam safety light barriers ............................................................................ 48
4.3.1 Testable type 2 single-beam safety light barriers.............................................................. 48
4.3.2 Testable type 4 single-beam safety light barriers.............................................................. 49
4.3.3 Customer-specific testable single-beam safety light barriers ............................................49
4.3.4 Information on installing testable single-beam safety light barriers................................... 50
4.4 ESPE – Electro-sensitive protective equipment ................................................................... 52
4.5 Motion monitoring ................................................................................................................. 52
4.6 Safety outputs....................................................................................................................... 53
5 Special functions ................................................................................................54
5.1 Muting ................................................................................................................................... 54
6 Installing/removing .............................................................................................55
6.1 Installing modules on hat rail ................................................................................................ 55
6.2 Removing modules from the hat rail ..................................................................................... 59
7 Electrical installation ..........................................................................................61
7.1 Requirements for electrical installation ................................................................................. 61
7.2 Internal wiring of the supply voltage ..................................................................................... 63
8 Configuration ......................................................................................................64
9 Commissioning ...................................................................................................65
9.1 Total acceptance of the application ...................................................................................... 65
9.2 Tests before initial commissioning........................................................................................ 65
10 Diagnostics..........................................................................................................66
10.1 What to do in the event of an error ....................................................................................... 66
10.2 Error statuses........................................................................................................................ 66
10.3 Error displays in the status LEDs, error messages, troubleshooting measures ................... 67
10.3.1 Device state and LED displays in the controller modules .................................................68
10.3.2 Device state and LED displays in the safe input/output modules......................................70
10.3.3 Device state and LED displays in the standard input/output modules ..............................71
10.4 Support ................................................................................................................................. 73
10.5 Expanded diagnostics........................................................................................................... 73

Table of Contents
Leuze electronic MSI 400 5
11 Maintenance ........................................................................................................74
11.1 Regular testing of the safety equipment by qualified persons .............................................. 74
11.2 Replacing devices................................................................................................................. 75
11.2.1 Safety measures when replacing devices .........................................................................75
12 Technical data .....................................................................................................76
12.1 System response times ........................................................................................................ 76
12.1.1 Minimum switch-off time....................................................................................................78
12.1.2 Response time of the state flag......................................................................................... 78
12.1.3 Default values for non-secure or secure data ...................................................................78
12.2 Safety technology reference values...................................................................................... 79
12.2.1 Controller modules without I/O expansion.........................................................................79
12.2.2 Controller modules with safe I/O expansions ....................................................................80
12.3 Data sheet ............................................................................................................................ 81
12.3.1 Controller module ..............................................................................................................81
12.3.2 Safe input/output expansion module .................................................................................84
12.3.3 Safe input expansion module ............................................................................................87
12.3.4 Standard input/output expansion module.......................................................................... 89
12.4 Dimensional drawings........................................................................................................... 91
12.4.1 Controller module ..............................................................................................................91
12.4.2 Input/output expansion modules .......................................................................................93
13 Order data............................................................................................................94
13.1 Hardware modules and accessories..................................................................................... 94
13.2 Modules for contact expansion ............................................................................................. 96
14 Appendix..............................................................................................................97
14.1 Declaration of Conformity ..................................................................................................... 97
14.2 Checklist for manufacturers .................................................................................................. 98
14.3 Complete list of error messages ........................................................................................... 99

About this manual
Leuze electronic MSI 400 6
1 About this manual
Please read this section and the Safety [chapter 2] section carefully before documenting or working with
the modular MSI 400 ##safety control the corresponding MSI 400 modules.
1.1 Function of this document
There are three manuals for the MSI 400 system with clearly delineated areas of application as well as in-
stallation instructions and brief instructions for each module.
•This hardware manual describes in-detail all modules that can be used with a MSI 4xx controller mod-
ule and their functions. Use the hardware manual mainly for planning MSI 400 safety controls.
This manual will guide technical personnel of the machine manufacturer and/or machine operator
on safe installation, electric installation, commissioning, and maintenance of the modular MSI 400
safety control.
These manual does not provide instructions for operating the machine into which the safety control is
or will be integrated. Instructions on how to operate the machine are provided for this purpose.
• The software manual describes the software-supported configuration and parameterization of the MSI
400 safety control. In addition, the software manual contains a description of the important diagnostic
functions for operation and detailed information for identifying and eliminating errors. Use the software
manual mainly when configuring, commissioning and operating MSI 400 safety controls.
• The gateway manual describes in-detail the MSI 400 gateways and their functions.
• Each module contains the installation instructions/brief instructions. These instructions provide in-
formation on the fundamental technical specifications of the modules and contain simple installation in-
structions. Use the installation instructions/brief instructions when installing the MSI 400 safety control.
This manual contains original operating instructions in accordance with the Machinery Directive.
1.2 Target group
This manual is targeted toward designers, developers, and operators of systems that are to be safe-
guarded by a modular MSI 400 safety control.
It is also targeted toward persons integrating a MSI 400 safety control into a machine, commissioning it for
the first time, or maintaining such a system.
1.3 Information depth
This manual contains information on the modular MSI 400 safety control with respect to the following top-
ics:
• Installation
• Electrical installation
• Hardware commissioning
• Maintenance
• Error diagnostics and error elimina-
tion
• Item numbers
• Conformity and approval
Furthermore, specialized technical knowledge that is not provided in this document is required when
designing and using Leuze safety equipment.
Essentially, governmental and legal regulations must be adhered to when operating the modular MSI 400
safety control.
Downloads are provided on the internet
Also consult our website on the Internet. At the following link http://www.leuze.com, you will find:
• the MSI.designer software
• The MSI 400 manuals available for display and printing in various languages:
• This hardware manual (50134711)
• The software manual (50134713)
• The gateway manual (50134715)

About this manual
Leuze electronic MSI 400 7
1.4 Scope of validity and applicable documents
This manual is valid for all MSI 400 safety control modules that are operated in connection with MSI 4xx
and MSI.designer controller modules.
Tab.1.1: Overview of the MSI 400 documentation
Document Title Item number
Software manual MSI.designer Software 50134713
Hardware manual MSI 400 Hardware 50134711
Gateway manual MSI 400 Gateways 50134715
Operating instructions MSI 400 50134613
Operating instructions MSI-EM-IO84-xx / MSI-EM-I8-xx 50134614
Operating instructions MSI-EM-IO84NP-xx 50134615
Operating instructions MSI-FB-CANOPEN 50134616
Operating instructions MSI-FB-PROFIBUS 50134617
Operating instructions MSI-FB-ETHERCAT 50134618
1.5 Abbreviations used
Contactless
safety device
Contactless Safety Device
EDM External Device Monitoring
PFHD Probability of Dangerous Failure per Hour
OSSD Output Signal Switching Device
SIL Safety Integrity Level
PLC Programmable Logic Controller
1.6 Symbols/icons and writing style/spelling standard used
NOTICE
i
These are notes that provide you with information regarding particularities of a device or a soft-
ware function.
WARNING
Warning!
A warning lets you know about specific or potential hazards. It is intended to protect you from
accidents and help prevent damage to devices and systems.
ÄPlease read and follow the warnings carefully!
Failure to do so may negatively impact the safety functions and cause a hazardous state to
occur.
Menus and commands
The names of software menus, submenus, options, and commands, selection fields, and windows are writ-
ten in bold font. Example: Click on Edit in the File menu.

About this manual
Leuze electronic MSI 400 8
1.7 Copyright and right to make changes
Copyright
This document is copyright-protected. The rights derived from this copyright are reserved for Leuze elec-
tronic. Reproduction of this document or parts of this document is only permissible within the limits of the
statutory provision of the Copyright Act. Any modification or abridgment of the document is prohibited
without the express written agreement of Leuze electronic.
Allen-Bradley, CompactBlock Guard I/O, CompactLogix, ControlFLASH, ControlLogix, DH+, FactoryTalk,
FLEX, GuardLogix, Kinetix, Logix5000, MicroLogix, PanelBuilder, PanelView, PhaseManager, PLC-2,
PLC-3, PLC-5, POINT I/O, POINT Guard I/O, Rockwell Automation, Rockwell Software, RSBizWare,
RSFieldbus, RSLinx, RSLogix 5000, RSNetWorx, RSView, SLC, SoftLogix, Stratix, Stratix 2000, Stratix
5700, Stratix 6000, Stratix 8000, Stratix 8300, Studio 5000, Studio 5000 Logix Designer, SynchLink, and
Ultra are registered trademarks of Rockwell Automation, Inc.
ControlNet, DeviceNet, and EtherNet/IP are registered trademarks of ODVA, Inc.
TwinCAT is a registered trademark of Beckhoff Automation GmbH.
EtherCAT is a registered trademark and a patented technology licensed by Beckhoff Automation GmbH.
Microsoft, Windows 98, Windows NT, Windows 2000, Windows XP, Windows 7, Windows 8, Windows 8.1,
Windows 10 and .NET Framework are registered trademarks of the Microsoft Corporation.
Any other product or trade names listed in this manual are the trademarks or registered trademarks of the
respective owners.
Subject to change.
Subject to technical changes for reasons of continued development.

Safety
Leuze electronic MSI 400 9
2 Safety
This section is intended to support your safety and the safety of the system users.
ÄPlease read this section carefully before you work with a MSI 400 system.
2.1 Qualified persons
The modular MSI 400 safety control may only be installed, commissioned, and maintained by qualified per-
sons.
Qualified persons are those who
• have suitable technical training and
• have been trained by the machine operator in the operation and applicable safety guidelines and
• have access to the MSI 400 operating instructions and have read said instructions and have duly noted
these and
• have access to the operating instructions for the safety devices connected to the safety control (e.g.
safety light curtain) and have read them and duly noted them.
2.2 Areas of application of the device
The modular MSI 400 safety control is an adjustable control for safety applications. It is usable
• as per EN 61508 up to SIL 3
• as per EN 61131-6 up to SIL 3
• as per EN 62061 up to SIL CL 3
• as per EN ISO 13849-1:2015 to performance level e / category 4
• as per EN 81-1
• as per EN 50156-1
• The safety function must be tested at least once annually
• A consistent redundant structure must be implemented
• If relay expansion modules are used, the correct switching of the relays must be monitored using
feedback contacts (EDM)
• The requirements of EN 50156-1, Section 10.5.6, must be considered
The level of safety actually achieved depends on the external wiring, the implementation of the wiring, the
parameterization, the selection of the command encoder, and their arrangement on the machine.
Opto-electronic and tactile safety sensors (e.g. light curtains, laser scanners, safety switches, sensors,
emergency stop switches) are connected and logically linked at the modular safety control. The corres-
ponding actuators on the machine or systems can be securely switched off via the switch outputs of the
safety control.

Safety
Leuze electronic MSI 400 10
2.3 Proper use
The modular MSI 400 safety control may only be operated under the following conditions:
• You are operating the control within the specified operating limits for voltage, temperature, etc. (see the
following for further information: Technical data [chapter 12])
• You are operating the control within the specified areas of application. (Further information: Areas of
application of the device [chapter 2.2])
The control may only be operated by qualified personnel and may only be used on a machine on which it
has been installed and commissioned for the first time by a qualified person in accordance with this
manual.
In the event of any other use or any changes to the device – including within the scope of installation – this
shall nullify any warranty claim with respect to Leuze electronic GmbH.
• The external power supply of the devices must able to bridge a short-term power outage of 20 ms in
accordance with EN 60204. Suitable PELV- and SELV-capable power packs can be obtained as ac-
cessories from Leuze electronic.
• The modules for the MSI 400 system correspond to class A, group 1, in accordance with EN 55011.
Group 1 includes all ISM devices in which intentionally generated and/or wired HF power, which is re-
quired for the internal function of the device itself, occurs.
• If you wish to use the MSI 400 system for domestic purposes, you need to take additional steps to pre-
vent the emission of radio frequency interference in limit class B according to EN 55011. Here are
some steps you might take:
• The use of interference suppressor filters in the supply circuit
• Installation in grounded switch cabinets or boxes
UL/CSA applications:
• Use lines that are suitable for a temperature range of 60 to 75°C.
• Tighten the screw terminals with a torque of 5-7 lbs/in.
• Only use in a pollution degree 2 environment.
• The modules must be supplied by a voltage source with protective isolation, which is protected by a
fuse in accordance with UL248 with a nominal power of 100 V, wherein V corresponds to the direct
current power supply with a maximum value of 42.4 VDC, which means that the requirements of
UL508 for the current and voltage limits are met.
• The maximum permissible total current for the MSI-EM-IO84 modules with outputs Q1to Q4 is Itotal =
3.2A.
NOTICE
i
The safety functions are not evaluated by UL. The approval corresponds to UL508, general ap-
plications.

Safety
Leuze electronic MSI 400 11
2.4 General safety information and protective measures
WARNING
Note the safety information and protective measures!
Note the following points in order to ensure proper use of the MSI 400 safety control.
• Please follow the standards and guidelines valid in your country when installing and using the MSI 400
safety control.
• The national/international legal regulations apply to the installation and use of the safety control as well
as for the commissioning and repeated technical testing, particularly the following:
• Machinery Directive 2006/42/EC
• EMC Directive 2014/30/EU
• Work Equipment Directive 2009/104/EC
• Low-Voltage Directive 2014/35/EU
• The accident prevention regulations/safety rules
• RoHS (Restriction of Hazardous Substances) Directive 2011/65/EU
• Manufacturers and operators of a machine on which a MSI 400 safety control is being used are re-
sponsible for coordinating with the proper authorities with regard to applicable safety guidelines/rules
and complying with these.
• The notices, particularly the test notices, must be observed without fail.
Further information: Requirements for electric installation [chapter 7.1]
The tests must be conducted by qualified persons or by those who are personally authorized and com-
missioned to do so and must always be fully documented at all times by a third-party.
• This manual must be provided to the operator of the machine on which the MSI 400 safety control is
being used. The machine operator must be trained by qualified persons and is required to read this
manual.

Safety
Leuze electronic MSI 400 12
2.5 Environmentally friendly behavior
The modular MSI 400 safety control and the corresponding modules are designed such that they stress the
environment as little as possible. They use only a minimum of power and resources.
ÄMake sure that you also carry out work while always considering the environment.
2.5.1 Disposal
The disposal of unusable or irreparable devices should always be done in accordance with the respectively
valid country-specific waste-elimination guidelines (e.g. European Waste Code 16 02 14).
NOTICE
i
We will be happy to help you in disposing of these devices.
Simply contact us.
2.5.2 Sorting of materials
WARNING
Important information
ÄThe sorting of materials may only be carried out by qualified persons!
ÄCare must be used when disassembling the devices. There is a risk of injuries during this
process.
Before you can route the devices to the environmentally-friendly recycling process, it is necessary to sort
the various materials of the MSI 400 devices.
ÄSeparate the housing from the rest of the components (particularly from the PC board).
ÄPlace the separated components into the corresponding recycling containers (see the following table).
Tab.2.1: Overview of disposal according to components
Components Disposal
Product
Housing
PC boards, cables, connectors, and
electric connecting pieces
Plastic recycling
Electronics recycling
Packaging
Cardboard, paper Paper/cardboard recycling

Product description
Leuze electronic MSI 400 13
3 Product description
This section will provide you with information on the properties of the MSI 400 system and describes the
setup and function.
3.1 System properties
Fig.3.1: Modular MSI 400 safety control
The MSI 400 system is characterized by the following system properties:
• Modular setup:
1 controller module and up to 12 input/output expansion modules, each of which has an overall width of
22.5 mm
• 16 to 116 inputs and 4 to 56 outputs
• They can be programmed using the MSI.designer software
• Can use up to 300 standard and application-specific logical blocks
• Standard logical blocks: AND, OR, NOT, XNOR, XOR
• Application-specific logical blocks: Emergency stop, two-hand, muting, operating mode selection
switch, reset, restart
• Can be integrated into different networks using gateways (e.g. ProfibusDP, CANopen, Modbus/
TCP,etc.)
The MSI.designer programming software is available for configuring the control tasks. It can be down-
loaded [chapter 1.3] on our website on the Internet.

Product description
Leuze electronic MSI 400 14
3.2 System setup
A MSI 400 system consists of the following modules and/or components:
• 1 Controller module
• 1 Program removable storage
• MSI.designer programming software
• Up to 2 gateway modules
• Up to 12 additional MSI-EM-IO84, MSI-EM-I8 and MSI-EM-IO84NP input/output modules
• In addition, MSI-XX expansion modules can be used. This may be, for example, the MSI-SR-SM42OS
standstill monitor or the relay output expansions.
These modules are shown in the report from MSI.designer but cannot be logically connected to the
modules of the MSI 400 system.
Further information: Software manual, chapter "Special case: Expansion module MSI-XX"
Examples
Fig.3.1: Example of a minimum MSI 400 system setup with a MSI 420/430 controller module
Fig.3.2: Example 2 - Maximum setup of a MSI 400 system

Product description
Leuze electronic MSI 400 15
Tab.3.1: Overview of modules (without program removable storage)
Type Description Inputs Outputs Logical
blocks
Max. oc-
currence
MSI 410 Controller module 20 4 300 1×
MSI 420 Controller module 16-20 1) 4-81) 300 1x
MSI 430 Controller module 16-20 1) 4-81)
MSI-EM-IO84 Input/output expansion 8 4 – 12x
MSI-EM-I8 Input expansion 8 – –
MSI-EM-IO84NP Input/output expansion 81) 81) – 12×
MSI-FB-PROFIBUS PROFIBUS DP gate-
way
–––2×
MSI-FB-CANOPEN CANopen gateway – – –
MSI-FB-ETHERCAT EtherCAT Gateway – – –
1) 4 inputs or 4 outputs can be configured as an option
3.3 Version, compatibility, and features
There are various module versions and function packages for the MSI 400 product family that enable vari-
ous functions. This section will give you an overview as to which module version, which function package,
and/or which version of the MSI.designer you will need to be able to use a certain function or a certain
device.
Tab.3.2: Module and software versions required
Available with module version and higher
Feature / functionality MSI 410 MSI 420 MSI 430 MSI.designer
Safe I/O (MSI-EM-IO84, MSI-EM-
I8)
D-01.xx D-01.xx D-01.xx V1.0
Modbus TCP --- ---
PROFINET IO --- ---
Non-secure I/O (MSI-EM-IO84NP) D-01.xx D-01.xx
EtherCAT (MSI-FB-ETHERCAT) D-01.xx D-01.xx
EtherNet/IP --- ---
Press functions1) D-01.xx D-01.xx
Standstill monitor1) D-03.xx D-03.xx D-03.xx V2.0
1) only available with module variants .F50 (example: MSI 420.F50 )
Info
• You can find the module version on the type plate of the modules.
• You will find the MSI.designer software version in the main menu.
• The latest software version is available in the Internet at the following address http://www.leuze.com.
• Newer modules are backwards-compatible, which means that each module can be replaced with a
module having a higher module version.
• You can find the date of manufacture for a device on the type plate in the S/N field in the format
<Product no.>yywwnnnnn (yy = year, ww = calendar week).

Product description
Leuze electronic MSI 400 16
3.4 Controller module MSI 410
3.4.1 Description
The MSI 410 controller module is a central processing unit for the entire system in which all of the signals
are monitored and logically processed according to the configuration stored in the MSI-SD-CARD program
removable storage. The module has safe inputs and outputs as well as test signal outputs. The system out-
puts are switched as a result of the processing. The internal safety bus in this case serves as a data inter-
face.
Module versions
In addition to the basic version, there is the MSI 410.F50 compact module.
It has additional functions for:
• Press control
• Motion detection (standstill monitor)
3.4.2 Display elements, interfaces, and terminal description
8 input LEDs
LED PWR/EC
MS LED
CV LED
8 input LEDs
4 output/
4 input LEDs
Mini-USB connection
SD slot for
MSI-SD-CARD
Fig.3.3: MSI 410 display elements
Tab.3.3: 4 LED displays
LED Meaning
PWR/EC Display of the supply voltage state
Display of an error through various Flashing codes [chapter
10.3.1]
MS Display of the Module state [chapter 10.3.1]
CV Display of the verification state of the Control project [chapter
10.3.1]
Input LED I1 to I20 State display of the Inputs [chapter 10.3.1]
Output LED Q1 to Q4 State display of the Outputs [chapter 10.3.1]
Tab.3.4: MSI 410 pin assignment
Pin assignment
A1 24 V supply voltage for all modules, except for supply of outputs
A2 GND of supply voltage
I1 - I20 Safe, digital inputs
Q1 - Q4 Safe, digital outputs
B1 24 V supply voltage of outputs Q1 - Q4
T1 - T4 Test signal outputs

Product description
Leuze electronic MSI 400 17
USB interface
The controller module has a mini-USB interface with the following functions:
• Transfer of the configuration from MSI.designer to the program removable storage
• Reading of configuration from program removable storage in MSI.designer
• Diagnostics of the MSI 400 system with MSI.designer
Tab.3.5: USB interface pin assignment
Connector/
bushing
USB mini
Pin Signal Color Assignment PC-side
1 +5V
2 - data
3 + data
5 GND
NOTICE
i
ÄIf the USB interface of the controller module is permanently connected, then the maximum
permissible cable length is 3 m.
ÄAvoid using ground loops between the USB interface GND and the A2 connection of the
controller module, e.g. by using optocouplers.

Product description
Leuze electronic MSI 400 18
3.4.3 Internal circuits
Internal safety bus
Fig.3.4: Inputs and test pulses at an MSI 410 module
Fig.3.5: Outputs at an MSI 410 module
3.4.4 Limited short-circuit detection in the input circuits
WARNING
ÄOne MSI 4xx module has four test signal generators T1 – T4.
ÄShort-circuits between test signal generators of a MSI 4xx module are detected. Short circuit
detection is only ensured between different modules if the test gaps of the test signal gener-
ators are < 4 ms, the test periods ≥ 200 ms. Short-circuits past 24VDC (after High) at in-
puts that are connected to test outputs are detected independently of the length of the test
gaps.
Make note of this during wiring (e.g. through separate routing or protected lines)!

Product description
Leuze electronic MSI 400 19
3.4.5 Deactivating the test pulses at the outputs
It is possible to deactivate the test pulses at one or more output pairs. The outputs of a MSI 410 module
are combined into two output pairs. Q1/Q2 and Q3/Q4. The test pulses each act upon the two outputs of an
output pair.
WARNING
Switching off the test pulses at one of the two outputs of an output pair will switch off the
test pulses of the entire output pair!
Deactivating the test pulses at one or more safety outputs of a MSI 4xx module reduces the
safety parameters of both safety outputs of the respective output pair of this module.
ÄBe aware of this in order to ensure that your application corresponds to an appropriate risk
analysis and risk avoidance strategy.
ÄYou can find more detailed information on the safety parameters here: Safety technology
reference values [chapter 12.2]
WARNING
Be sure to use protected or separate cabling!
ÄIf you deactivate the test pulses at one or more safety outputs, short-circuits at other output
circuits cannot be detected. This affects the safety function!
ÄIn the event of a short-circuit after 24 V, it will no longer be possible to switch off the output.
Furthermore, it will not be possible to prevent reverse current from going into a switched-off
output, which will influence the capability of switching off the outputs.
WARNING
Carry out cyclic tests when the test pulses at one or more safety outputs are deactivated!
Once you deactivate the test pulses at one or more safety outputs, conduct the following tests
once a year:
ÄSwitch off all of the safety outputs without test pulses simultaneously for at least one second
via the logic program of the controller module.
OR
ÄRestart the MSI 400 system by switching off the supply voltage.
You will thus deactivate the test pulses at an output of a MSI 400 module:
ÄConnect an output element to the MSI 4xx module.
ÄUsing the right mouse key, click on the output element and select the Edit.... command in the context
menu.
ÄDeactivate the Activation of test pulses of this output option.
The test pulses of this output will be switched off. A corresponding note will be displayed in the hard-
ware configuration area under the respective MSI 4xx module.
3.4.6 Single-channel use of outputs
WARNING
Be sure to consider a potential brief switch to high with single-channel safety outputs!
In the event of an internal hardware error, single-channel safety outputs can switch to high once
for 10 ms after the error has been detected.
ÄConsider this during your risk analysis and reduction strategy.
Otherwise, there is a hazard for the operator of the machine.

Product description
Leuze electronic MSI 400 20
3.5 Controller module MSI 420
3.5.1 Description
The MSI 420 controller module is the central processing unit for the entire system in which all of the signals
are monitored and logically processed according to the configuration stored in the MSI-SD-CARD program
removable storage. The module has safe inputs and outputs as well as test signal outputs. The system out-
puts are switched as a result of the processing. The internal safety bus in this case serves as a data inter-
face.
Module versions
In addition to the basic version, there is the MSI 420.F50 compact module.
It has additional functions for:
• Press control
• Motion detection (standstill monitor)
3.5.2 Display elements, interfaces, and terminal description
8 input LEDs
LED PWR/EC
MS LED
CV LED
8 input LEDs
4 output/
4 input LEDs
LED NET
Mini-USB connection
RJ45 connection
SD slot for
MSI-SD-CARD
Fig.3.6: Display elements of a MSI 420 module
Tab.3.6: MSI 420/430 LED displays
LED Meaning
PWR/EC Display of the supply voltage state
Display of an error through various Flashing codes [chapter
10.3.1]
MS Display of the Module state [chapter 10.3.1]
CV Display of the verification state of the Control project [chapter
10.3.1]
Input LED I1 to I16,
IQ1 to IQ4
State display of the Inputs [chapter 10.3.1]
Output LED Q1 to Q4,
IQ1 to IQ4
State display of the Outputs [chapter 10.3.1]
Tab.3.7: MSI 420/430 pin assignment
Pin assignment
A1 24 V supply voltage for all modules, except for supply of outputs
A2 GND of supply voltage
I1 - I16 Safe, digital inputs
Q1 - Q4 Safe, digital outputs