Pepperl+Fuchs FIELDBUS User manual

COMPACT FIELDBUS
POWER HUB,
GE N E R I C I N T E R F A C E
PROCESS AUTOMATION
MANUAL

With regard to the supply of products, the current issue of the following document is ap-
plicable: The General Terms of Delivery for Products and Services of the Electrical Indus-
try, published by the Central Association of the Electrical Industry (Zentralverband
Elektrotechnik und Elektroindustrie (ZVEI) e.V.) in its most recent version as well as the
supplementary clause: "Expanded reservation of proprietorship"
Compact Fieldbus Power Hub,Generic Interface

Compact Fieldbus Power Hub,Generic Interface
3
1 Safety ........................................................................................... 5
1.1 Validity................................................................................................... 5
1.2 Symbols used....................................................................................... 5
1.3 System Operator and Personnel ........................................................ 5
1.4 Pertinent Laws, Standards, Directives, and further Documentation5
1.5 Delivery, Transport and Storage ......................................................... 6
1.6 Marking ................................................................................................. 6
1.7 Intended Use ........................................................................................ 7
1.8 Mounting and Installation.................................................................... 7
1.8.1 Mounting Instructions for HD2* Modules............................................ 7
1.8.2 Zone 2 and Div. 2 ............................................................................... 7
1.8.3 Ex ic................................................................................................... 8
1.8.4 Ex nL.................................................................................................. 8
1.9 Housing................................................................................................. 8
1.10 Repair and Maintenance...................................................................... 9
1.11 Disposal ................................................................................................ 9
2 Specification ............................................................................. 10
2.1 Overview ............................................................................................. 10
2.2 System components .......................................................................... 11
2.2.1 Motherboard .................................................................................... 11
2.2.2 Power Supply Modules HCD2-FBPS-*............................................. 11
2.2.3 Diagnostic Modules ......................................................................... 12
2.3 Component Identity ........................................................................... 13
2.4 Technical Data .................................................................................... 13
2.5 Dimensional Drawings....................................................................... 16

4
Compact Fieldbus Power Hub,Generic Interface
3 Installation and Commissioning ............................................. 17
3.1 Mounting and Dismounting ...............................................................17
3.2 Shielding and Grounding ..................................................................18
3.3 Connection Layout .............................................................................18
3.3.1 Connections.....................................................................................20
3.4 Segment Termination .........................................................................21
4 Fieldbus Power Hub Basic Diagnostics ................................. 22
5 Thermal Dissipation ................................................................. 23
6 Appendix ................................................................................... 25
6.1 Ordering Information..........................................................................25
6.2 Electromagnetic Compatibility Verification in Accordance with 
EC Council Legislation Directive 2004/108/EC................................25
6.3 Referenced Documents .....................................................................26

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Safety
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1Safety
1.1 Validity
Specific processes and instructions in this document require special precautions to guarantee
the safety of the operating personnel.
1.2 Symbols used
This document contains information that you must read for your own personal safety and to
avoid property damage. Depending on the hazard category, the warning signs are displayed in
descending order as follows:
Safety-relevant symbols
Informative symbols
Action
This symbol indicates a paragraph with instructions.
1.3 System Operator and Personnel
The plant owner is responsible for its planning, installation, commissioning, operation,
maintenance and disassembly.
Mounting, installation, commissioning, operation, maintenance and disassembly of any
devices may only be carried out by trained, qualified personnel. The instruction manual must
be read and understood.
1.4 Pertinent Laws, Standards, Directives, and further Documentation
Laws, standards, or directives applicable to the intended use must be observed. In relation to
hazardous areas, Directive 1999/92/EC must be observed.
The corresponding data sheets, declarations of conformity, EC Type-examination certificates,
certificates and Control Drawings if applicable (see data sheet) are an integral part of this
document. You can find this information under www.pepperl-fuchs.com.
Due to constant revisions, documentation is subject to permanent change. Please refer only to
the most up-to-date version, which can be found under www.pepperl-fuchs.com.
Danger!
This symbol indicates a warning about an immediate possible danger.
In case of ignoring the consequences may range from personal injury to death.
Warning!
This symbol indicates a warning about a possible fault or danger.
In case of ignoring the consequences may cause personal injury or heaviest property damage.
Caution!
This symbol indicates a warning about a possible fault.
In case of ignoring the devices and any connected facilities or systems may be interrupted or
fail completely.
Note!
This symbol brings important information to your attention.

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Compact Fieldbus Power Hub,Generic Interface
Safety
1.5 Delivery, Transport and Storage
Check the packaging and contents for damage.
Check if you have received every item and if the items received are the ones you ordered.
Keep the original packaging. Always store and transport the device in the original packaging.
Always store the device in a clean and dry environment. The permitted storage temperature
(see data sheet) must be considered.
1.6 Marking
Motherboards
Diagnostic Modules
MBHC-FB-8R*
Pepperl+Fuchs GmbH
Fieldbus Power Hub
TÜV 10 ATEX 555761X
II 3G Ex nA IIC T4 Gc
HCD2-FBPS-1.500
Pepperl+Fuchs GmbH
Fieldbus Power Hub
TÜV 10 ATEX 555761X
II 3G Ex nA IIC T4 Gc
HCD2-FBPS-1.23.500
Pepperl+Fuchs GmbH
Fieldbus Power Hub
TÜV 10 ATEX 555761X
II 3G Ex nA IIC T4 Gc
HD2-DM-A
Pepperl+Fuchs GmbH
Fieldbus Power Hub
TÜV 04 ATEX 2500 X
II 3G EEx nA IIC T4
HD2-DM-A.RO
Pepperl+Fuchs GmbH
Fieldbus Power Hub
TÜV 04 ATEX 2500 X
II 3G EEx nA II T4

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1.7 Intended Use
The Compact Power Hub is intended to power eight FOUNDATION Fieldbus H1 segments in
redundant mode according to IEC 61158-2.
The Compact Power Hub may be installed in Zone 2 or Class I, Division 2 hazardous areas.
Types of protection are Ex nA (non-arcing) for Zone 2 Gas Groups IIC, IIB, IIA, and non-
incendive for use in Class I, Division 2 Gas Groups A, B, C, and D.
Dedicated Power Supply Modules limit the output voltage safely acc. to IEC 60079-11. In
combination with Pepperl+Fuchs Segment Protectors the outputs are specified Ex nl or Ex ic.
Thus, live maintenance at the field device level is permitted.
For further information about hazardous area installation refer to referenced documents see
chapter 6.3.
The devices are only approved for appropriate and intended use. Ignoring these instructions
will void any warranty and absolve the manufacturer from any liability.
The device must only be operated in the ambient temperature range and at the relative
humidity (non-condensing) specified.
1.8 Mounting and Installation
Prior to mounting, installation, and commissioning of the device you should make yourself
familiar with the device and carefully read the instruction manual.
Trunk and spur connectors are only allowed to be manipulated at ambient temperatures
between -5 °C and +70 °C.
The devices may be installed in a corrosive location acc. to ISA-S71.04-1985, severity level
G3.
1.8.1 Mounting Instructions for HD2* Modules
The modules are intended for mounting on an appropriate Fieldbus Power Hub motherboard.
The Power Hub motherboard features a special connection slot for HD2-DM-* diagnostic
modules labeled "Diagnostic Module only". Do not try to plug any other modules into this
connection slot. Other modules may be damaged.
Instruction for redundant systems
Each segment on a redundant motherboard must only be fitted with two power modules of the
same type.
1.8.2 Zone 2 and Div. 2
Connection or disconnection of energized non-intrinsically-safe circuits is only permitted in the
absence of a hazardous atmosphere.
It is necessary to pay particular attention to the type of Fieldbus Power Supply selected for use
on the Power Hub. This determines the type of Zone 2/Div. 2 installations and certified field
instruments that can be connected in Zone 2 or Div. 2 area.
HD2-DM-B
Pepperl+Fuchs GmbH
Fieldbus Power Hub
TÜV 04 ATEX 2500 X
II 3G EEx nA C IIC T4

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Compact Fieldbus Power Hub,Generic Interface
Safety
Take special care if Power Supply Modules are to be used with Pepperl+Fuchs Segment
Protectors for energy limited Ex nL, intrinsically safe Ex ic and non-incendive field wiring. 
Doublecheck to ensure that the correct type of Power Supply Module is used in relation to its
output values. For example, the output voltage must be equal or less than the maximum voltage
of the connected field devices.
Requirements for all used fieldbus products in Zone 2 installations are summarized in the
manual: "Using Pepperl+Fuchs fieldbus equipment in Zone 2 hazardous area environment".
You will find this document on the product page of the device at www.pepperl-fuchs.com.
The devices must be installed and operated only in enclosures that
■comply with the requirements for enclosures according to IEC/EN 60079-0
■are rated with the degree of protection IP54 according to IEC/EN 60529
Avoid electrostatic discharges while operating the installed device. Avoid electrostatic charge.
In Zone 2, only such devices are allowed to be connected to circuits that are suitable for the
operation in explosion hazardous areas of Zone 2 and for the conditions available at the place
of operation (declaration of conformity or certificate of a testing department).
1.8.3 Ex ic
The intrinsically safe circuits of the associated apparatus may lead into hazardous areas. Make
sure to observe all relevant distances (creepage distances, clearances) to all non-intrinsically
safe circuits in accordance with IEC/EN 60079-14.
If "Ex ic" protected circuits are operated with non-intrinsically safe circuits, they must no longer
be used as "Ex ic" protected circuits.
The respective peak values of the field device and the associated apparatus with regard to
explosion protection should be considered when connecting intrinsically safe field devices with
intrinsically safe circuits of associated apparatus (verification of intrinsic safety). Make sure to
observe IEC/EN 60079-14 and IEC/EN 60079-25.
When using the Fieldbus Power Hub with Pepperl+Fuchs Segment Protectors to generate Ex ic
rated outputs, connector covers (ACC-MB-CC) have to be plugged on the bulk power supply
connectors. This is to guarantee the clearance distance of 50 mm between host terminal and
power supply connectors.
The devices must be installed and operated only in an environment that ensures a
pollution degree 2.
1.8.4 Ex nL
"Ex nL" protected circuits (limited energy) must no longer be used as "Ex nL" protected circuits,
■if these circuits were operated with non-intrinsically safe circuits or
■if these circuits were operated with circuits that do not comply with the type of protection
"Ex nL".
1.9 Housing
If additional housings are needed for installation in hazardous areas, the following points must
be considered / evaluated:
To ensure the IP degree of protection:
■all seals must be undamaged and correctly fitted
■all screws of the housing / housing cover must be tightened with the appropriate torque
■only cable of the appropriate size must be used in the cable glands
■all cable glands must be tightened with the appropriate torque
■all empty cable glands must be sealed with sealing plugs

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1.10 Repair and Maintenance
The devices must not be repaired, changed or manipulated. If there is a defect, the product
must always be replaced with an original device.
1.11 Disposal
Disposing of devices, packaging material, and possibly contained batteries must be in
compliance with the applicable laws and guidelines of the respective country.

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Compact Fieldbus Power Hub,Generic Interface
Specification
2Specification
2.1 Overview
The FieldConnex®Compact Power Hub is a high-performance power supply for
FOUNDATION Fieldbus H1 with redundant configuration as standard for eight segments. It
consists of a motherboard with sockets for plug-in modules: Two power supply modules per
segment and two diagnostic modules. The Power Hub is designed for use with fieldbus
systems in accordance with IEC 61158-2. This standard specifies how power and
communication are transmitted sharing one shielded twisted-pair cable. Communication
between field devices and a host system is established by modulating the data signal onto the
power stream utilizing Manchester Bus Powered (MBP) transmission.
All FieldConnex®Compact Power Hubs feature superior design elements. The main design
features are redundancy, passive impedance generation, well-balanced circuitry, and low heat
dissipation. All active electronic components are located in the plug-in modules. Each module
holds the electronic components for only one segment, and two modules operate in redundant
configuration. When an exchange becomes necessary, only the smallest amount of electronic
components is exchanged compared to block configurations for power supplies. Modules can
be exchanged while the system is energized without the use of tools, thus ensuring very high
system availability.
Impedance generation prevents the data signal from being short circuited by the power
supply’s low internal resistance. This impedance generation is designed with passive
components such as inductances and resistors with very long durability. A fully balanced circuit
and segment design is important for undisturbed fieldbus operation. An external disturbance
through EMI impacts both leads of the shielded twisted-pair cable symmetrically. The data
signal is thus undisturbed. Low heat dissipation allows highest packing density inside the
cabinet and a very long service life.
When applied to fieldbus in hazardous areas, the Power Hub feeds segments following the
High-Power Trunk concept for explosion protection. High power level on the trunk line is fed to
the field instrument via couplers such as FieldBarriers or Segment Protectors. The Power Hub
powers segment installed as non-arcing (Ex nA).
FieldBarriers enable live maintenance in Zone 0/1 as outputs are classified Ex ia. Thus, power
limitations of intrinsically safe explosion protection are overcome, enabling maximum cable
lengths and highest number of devices in any hazardous area.
Two plug-in Advanced Diagnostic Modules for fieldbus are available. These modules monitor
the physical layer online and in real time, enabling detection of degradation and faults during
operation. Measurement data and alarms are transmitted to the control room. They bring
visibility to the fieldbus physical layer, so it can be treated as an active component in Plant
Asset Management systems. Operators are enabled to decide on proactive measures to avoid
unwanted situations while the plant is running smoothly.

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The following table summarizes the main features and benefits of the Power Hub:
2.2 System components
2.2.1 Motherboard
MBHC-FB-8R
The motherboard MBHC-FB-8R enables the redundant supply of eight segments and the
connection of the FOUNDATION Fieldbus H1 Host system. 16 sockets hold the power supply
modules, with two each supplying one of the eight segments redundantly. Two extra sockets
hold diagnostic modules.
2.2.2 Power Supply Modules HCD2-FBPS-*
Power Supply Modules are modules providing full galvanic isolation between the bulk power
supply and the segments. They provide optimum system reliability for applications where
cabling and wiring are routed through critical or harsh electrical environments, i.e., where
superior protection from electromagnetic interference (EMI) is mandatory.
Power modules are connected to the motherboard via sockets. They can be exchanged while
the system is in operation. In redundant configuration, load is shared between two power
modules.
For different application requirements special Power Supply Modules are available:
Features User benefit
Lowest heat dissipation of less than 2 W per
segment under full load condition. Long service life. Very high packing density and reduced cooling requirements.
Exchange of modules while the system is
energized and load share between power
modules.
Increased segment availability.
Full balance of electric circuitry with high
isolation against RF and in-band interference. High resistance to external disturbance such as EMI.
High-integrity passive power conditioners. Long service life.
Local and remote alarm annunciation. Easy maintenance and troubleshooting.
Tolerance against inrush currents during
segment start. Long-term, robust operation with tolerance towards field device misbehavior.
Full current span operation from 10…500 mA. Flexible segment design and tolerance
against live working on field devices.
Advanced Diagnostic Module for physical
layer fieldbus diagnostics. Improved and known quality of fieldbus installation. Live supervision for preventive
and pro-active maintenance. Professional
tools for easy fieldbus troubleshooting.
Note!
If the motherboard is intended to be used with dedicated Power Supply Modules and Segment
Protectors to generate Ex ic rated outputs, a connector cover has to be mounted on each
power supply terminal. Two connector covers and special connectors come with each
motherboard.
Designation Application
HCD2-FBPS-1.500 General purpose
HCD2-FBPS-1.23.500 Ex ic, Ex nL

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Specification
2.2.3 Diagnostic Modules
Basic Diagnostic Module
The Basic Diagnostic Module provides basic system diagnostics. It monitors the input voltage
of the bulk power supply and each segment for overload and short circuit conditions. Each
Power Supply Module is checked for proper function. Power Modules operating in redundant
configuration are checked for compatibility. Status and faults are indicated by LEDs and can be
transmitted via dry contact.
Advanced Diagnostic Module
The Advanced Diagnostic Module is a comprehensive measurement tool for the fieldbus
physical layer. It is well suited for commissioning, online monitoring and maintenance. The
module provides the exact segment and individual device data needed for detection of
changes in the fieldbus physical layer. Segment measurements include fieldbus voltage and
load current; device specific measurements are: signal level, noise, and jitter. All data is
transmitted to the control room via Ethernet. The Diagnostic Manager –Basic Edition shows all
data on easy-to-use displays.
The Diagnostic Manager –Professional Edition offers additional functionality: the
commissioning wizard generates automated reports; the software displays clear text messages
for troubleshooting of out-of-spec behavior. The OPC server transmits user-selectable
summary alarms to the DCS.
For further information please refer to the manual Advanced Diagnostic Module HD2-DM-A.
Advanced Diagnostic Module Relay Output
The ADM relay output is a tool for permanently monitoring the fieldbus physical layer. Using
DIP switches, limit ranges can be configured for each physical layer parameter monitored.
The module distinguishes between two alarm types:
■"Maintenance required" alarm
■"Out Of Specification" alarm
The "Maintenance required" alarm enables proactive diagnosis. If a value exceeds the limit, a
relay contact opens and the respective segment LED starts to flash yellow. With this proactive
diagnosis, changes within the fieldbus installation can be detected early and fault sources can
be found before communication fails.
If an "Out of specification" alarm occurs (LED flashing red), one of the monitored physical layer
parameters has rapidly declined and moved out of range of "Maintenance required". A fast
examination of the affected segment is crucial to prevent a total dropout of this segment in the
near future.
To set up appropriate limit values for your fieldbus installation, a comprehensive diagnostic
solution such as the Pepperl+Fuchs Mobile Advanced Diagnostic Module is required during
commissioning to determine the DIP switch positions.

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2.3 Component Identity
2.4 Technical Data
System Specification
1Host connection
2Power modules
3Diagnostic modules
4Bulk power connections with mounted connector cover for Ex ic installations
5Screen/ground connection clamp
6Common alarm voltage-free contact and Diagnostic bus connection
7Trunk connection
8ACC-MB-HSK Screening/earthing kit
6
6
7
5
2
2
3
1
4
8
4
Ambient conditions
Ambient temperature -40 ... 60 °C
Storage temperature -40 ... 85 °C
Relative humidity < 95 % non-condensing
Shock resistance 10 g , 11 ms
Vibration resistance 1 g , 10 ... 150 Hz
Pollution Degree max. 2, according to IEC 60664
Mechanical specifications
Connection type plug with retaining screws
Core cross-section 2.5 mm2
Protection degree IP20
Standard conformity
Electromagnetic compatibility NE 21:2006
Protection degree IEC 60529
Fieldbus standard IEC 61158-2
Shock resistance EN 60068-2-27
Vibration resistance EN 60068-2-6
Corrosion resistance acc. to ISA-S71.04-1985, severity level G3

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Specification
Motherboard Types MBHC-FB-8R
Isolated Power Supply Module Type HCD2-FBPS-1.500
Isolated Power Supply Module Type HCD2-FBPS-1.23.500
Basic Diagnostic Module Type HD2-DM-B
Supply
Rated voltage 19.2 ... 35 V SELV/PELV
Rated current 16 A
Power loss typ. 0.4 W per segment
Terminating resistor 100 integrated
Indicators/operating means
Fault signal VFC alarm 1 A, 50 V DC, normally closed
Supply
Rated voltage 19.2 ... 35 V DC
Power loss typ. 1.6 W
Fieldbus interface
Rated voltage 28 ... 30 V
Rated current 500 ... 10 mA
Short-circuit current 550 mA
Indicators/operating means
LED ERR red flashing: short-circuit or undervoltage at output
LED PWR green if Uout > 28 V
Supply
Rated voltage 19.2 ... 35 V DC
Power loss typ. 1.6 W
Fieldbus interface
Rated voltage 21 ... 23 V
Rated current 500 ... 10 mA
Short-circuit current 550 mA
Indicators/operating means
LED ERR red flashing: short-circuit or undervoltage at output
LED PWR green if Uout > 21 V
Supply
Rated voltage Rated current 19.2 ... 35 V
Rated current 20 mA
Power loss Max. 0.5 W
Indicators/operating means
LED PRI PWR green: on, primary bulk power supply connected
LED SEC PWR green: on, secondary bulk power supply connected
LED ERR red: 2 Hz flashing, power supply fault (short-circuit,
undervoltage), redundancy fault

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Specification
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Advanced Diagnostic Module Type HD2-DM-A
Advanced Diagnostic Module Type HD2-DM-A.RO
Supply
Rated voltage 19.2 ... 35 V
Rated current 110 ... 30 mA
Power loss max. 2 W
Fieldbus interface
Number of segments 4
Rated voltage 9 ... 32 V
Indicators/operating means
LED PRI PWR green: on, primary bulk power supply connected
LED SEC PWR green: on, secondary bulk power supply connected
LED Seg 1...4 yellow: bus activity; red 2 Hz flashing: alarm; red: hardware
error
DIP-switch diagnostic address 1...247, binary coded
Supply
Rated voltage 19.2 ... 35 V
Rated current 40 ... 25 mA
Power loss max. 1 W
Fieldbus interface
Number of segments 4
Rated voltage 9 ... 32 V
Indicators/operating means
LED PRI PWR green: on, primary bulk power supply connected
LED SEC PWR green: on, secondary bulk power supply connected
LED Seg 1...4 yellow: bus activity; yellow 2 Hz flashing: Maintenance
required; red 2 Hz flashing: specification limit violated; red:
hardware error
DIP-switch fieldbus type , redundant supply , Signal level , Noise level ,
Jitter
Accessories
ACC-MB-HDC Diagnostic link cable
Coupling the diagnostic bus between two motherboards,
length 6 cm.
ACC-MB-CC Connector cover
Set of two covers with special connectors to keep clearance
distance between power and host terminals.
ACC-MB-HSK Grounding rail and four cable clamps used to simplify shield
connection on the trunk cable.

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Specification
2.5 Dimensional Drawings
All dimensions in millimeters (inches) and without tolerance indication.
169 mm (6.6")
268 mm (10.5")
38 mm
(1.5")
150 mm (5.9")
180 mm (7.1")
195 mm (7.7")

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Installation and Commissioning
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3 Installation and Commissioning
3.1 Mounting and Dismounting
Mounting of Fieldbus Motherboards on DIN Mounting Rail
To mount a motherboard on a DIN mounting rail, proceed as follows:
1. Place the motherboard on the mounting rail.
2. Tighten the two fastening screws to attach the motherboard on the DIN rail.
The motherboard has been mounted.
Mounting Modules on the Motherboard
To install a new module on the motherboard, proceed as follows:
1. Carefully center the polarisation holes and mate the two connectors, then gently press down
the module.
2. Push down the red Quick Lok Bars on each side of the module to fix it to the panel (no tools
required).
The new module has been installed.
Caution!
Hardware Damage
The Power Hub motherboard includes is a dedicated connection slot for the HD2-DM*
diagnostic modules labeled “Diagnostic Module only“.
Do not try to plug other modules into this connection slot. Other modules may be damaged.

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Compact Fieldbus Power Hub,Generic Interface
Installation and Commissioning
Dismounting Modules from the Motherboard
To dismount a module from the motherboard, proceed as follows:
Pull up the red Quick Lok Bars on each side of the module and carefully lift off the entire
module.
The module has been removed from the motherboard.
3.2 Shielding and Grounding
Prevent Grounding Loops
Depending on the chosen grounding method, you can leave the shield earthing at the host
connecton open.
If the grounding points of the host and the field devices do not have the same potential, the
shield of the motherboard must be left open to prevent a grounding loop.
3.3 Connection Layout
The following section describes the different connection details of the motherboard with
particular reference to the torques required for a safe installation.
For any terminal connections, observe the following cable and connection information.
Cable and Connection Information
■Permissible cross core section: 0.2-2.5 mm²
■Insulation stripping length: 7 mm
■If stranded conductors are used: Protect strand ends with end splices.
■Ensure that connectors are mechanically locked.
■Torque required for tightening terminal screws: 0.4-0.5 Nm
–
+
Caution!
This is not a safety earth.
Under certain conditions, it may be necessary to ground any exposed metal parts to ground.
Note that a correct grounding must be guaranteed at all times.
Tip
Doublecheck that the correct torques are used when un- and reinstalling the terminal during
wiring activities!

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Connecting the Trunk
The motherboard is connected to the trunk line via designated screw terminals. See "Cable
and Connection Information" on page 18.
Connecting the Diagnostic Bus
The motherboard is connected to the diagnostic bus via plug-in terminals on fixed circuit board
connectors. See "Cable and Connection Information" on page 18.
Connecting the Power Supply
The motherboard is connected to the bulk power supply via designated screw terminals. See
"Cable and Connection Information" on page 18.
+Segment +
-Segment -
SShield connection
Alarm Alarm signal lines
+Diagnostic bus +
-Diagnostic bus -
Connector PWR Module A or B:
+PWR
-PWR
S
_

Trunk
Alarm + -
RS-485
+ -

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Compact Fieldbus Power Hub,Generic Interface
Installation and Commissioning
Connecting the Host
The motherboard is connected to the host system via designated screw terminals.
Grounding
The motherboard is connected to the earth via designated screws.
If needed, an optional grounding rail can be applied.
The torque required for tightening the grounding screws: 1.5 Nm
3.3.1 Connections
+Host +
-Host -
SShield
S
_

Trunk
1Primary bulk power connection with mounted connector cover for Ex ic installations
2Host connection
3Secondary connection with mounted connector cover for Ex ic installations
4Common alarm voltage-free contact with final motherboard link (The alarm contact has
to be looped at the last motherboard)
5Diagnostic bus connection
6Connections for fieldbus trunk
7Diagnostic link cable ACC-MB-HDC
12
4
5
67
3