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Appendix E

EU Directives

A–7

European Union Directives

The recommendation is to use shielded cables as electrostatic “pipes” between
apparatus and systems, and to run heavy gauge equi-potential bond wires
alongside all shielded cables. When a shielded cable runs through the metallic wall
of an enclosure or machine, it is recommended in IEC 1000–5–2 that the shield
should be connected over its full perimeter to the wall, preferably using a conducting
adapter, and not via a pigtail wire connection to an earth ground bolt. Shields must be
connected to every enclosure wall or machine cover that they pass through.

 

Providing an earth ground for both ends of the shield for analog circuits provides the

perfect electrical environment for the twisted pair cable as the loop consists of signal
and return, in a perfectly balanced circuit arrangement, with connection to the
common of the input circuitry made at the module terminals. RS232 cables are
handled in the same way.

RS422 twin twisted pair, and RS485 single twisted pair cables also require a 0V link,
which has often been provided in the past by the cable shield. It is now
recommended that you use triple twisted pair cabling for RS422 links, and twin
twisted pair cable for RS485 links. This is because the extra pair can be used as the
0V inter-system link. With loop DC power supplies earth grounded in both systems,
earth loops are created in this manner via the inter-system 0v link. The installation
guides encourage earth loops, which are maintained at a low impedance by using
heavy equi-potential bond wires. To account for non–European installations
using single-end earth grounds, and sites with far from ideal earth ground
characteristics, we recommend the addition of 100 ohm resistors at each 0V
link connection in network and communications cables.

RXD

Master

RXD

TXD 0V

+

+

Slave n

TXD 0V

+

+

Last Slave

RXD

TXD

0V

+

+

Termination

100

W

100

W

Termination

100

W

When you run cables between PLC items within an enclosure which also contains
susceptible electronic equipment from other manufacturers, remember that these cables
may be a source of RF emissions. There are ways to minimize this risk. Standard data
cables connecting PLCs and/or operator interfaces should be routed well away from other
equipment and their associated cabling. You can make special serial cables where the
cable shield is connected to the enclosure’s earth ground at both ends, the same way as
external cables are connected.

 

For safety reasons, it is a specific requirement of the Machinery Directive that a keyswitch

must be provided that isolates any network input signal during maintenance, so that
remote commands cannot be received that could result in the operation of the machinery.
The FA–ISONET does not have a keyswitch! Use a keylock and switch on your enclosure
which when open removes power from the FA–ISONET. To avoid the introduction of
noise into the system, any keyswitch assembly should be housed in its own earth
grounded steel box and the integrity of the shielded cable must be maintained.

Again, for further information on EU directives we recommend that you get a copy of
our EU Installation Manual (DA–EU–M). Also, if you are connected to the World
Wide Web, you can check the EU Commision’s official site at:
http://eur–op.eu.int/

Analog and RS232
Cables

Multidrop Cables

Shielded Cables
within Enclosures

Network Isolation

Содержание D4-470

Страница 1: ...D4 470 User Manual Manual Number D4 470 M Read This First Read This Manual Before Making Changes To The D4 470...

Страница 2: ...standards We do not guarantee the products described in this publication are suitable for your particular application nor do we assume any responsibility for your product design installation or operat...

Страница 3: ...Wiring and Specifications Mounting and Wiring Guidelines 2 2 Panel Layout Clearances 2 2 Enclosures 2 3 Agency Approvals 2 3 Power Wiring 2 4 Internal Power Supply 2 4 Power Supply Limitations 2 4 Por...

Страница 4: ...rmation A 4 Basic EMC Installation Guidelines A 4 Enclosures A 4 Suppression and Fusing A 5 Internal Enclosure Grounding A 5 Equi potential Grounding A 6 Communications and Shielded Cables A 6 Analog...

Страница 5: ...e sure to include the revision number Title D4 470 User Manual Manual Number D4 470 M Edition Rev Date Description of Changes Original 8 99 original issue Rev A 4 00 changes for 400MHz processor Rev B...

Страница 6: ...11 Introduction to the D4 470 In This Chapter About this Manual Overview of the D4 470 Configuration Choices Accessories...

Страница 7: ...ications you are making require it You may also find the following manuals to be useful D Think Do Software Learning Guide D LookoutDirect included with D4 470 LK D D2 INST M or D4 INST M Installation...

Страница 8: ...ng and wiring the D4 470 describes the connections for power wiring and communications to other devices and presents specifications for the D4 470 Installing Hardware Accessories gives you a generic o...

Страница 9: ...hard and floppy disk drives expansion slots and ports similiar to a typical mini or mid tower PC See the full specifications beginging on page 2 7 The D4 470 comes with a 400MHz Pentuim processor moun...

Страница 10: ...preloaded The D4 470 2K comes with Windows 2000 preloaded The D4 470 NT comes with Windows NT preloaded The D4 470 LKD comes with Windows 98 and the Lookout Direct Development Package preloaded The D4...

Страница 11: ...S 2 Y adapter used to connect the keyboard and mouse to the single PS 2 port D Ribbon cables provided for connecting an additional IDE Device to the CPU board SCSI not supported D Floppy disks with va...

Страница 12: ...1 2 Installation Wiring and Specifications In This Chapter Mounting and Wiring Guidelines Power Wiring Ports and Connectors Technical and Environmental Specifications Dimensions...

Страница 13: ...an earth ground return The single ground point must be connected to the panel ground termination The panel ground termination must be connected to earth ground For this connection you should use 12 A...

Страница 14: ...siderations for enclosures include Conformance to electrical standards Protection from the elements in an industrial environment Common ground reference Maintenance of specified ambient temperature Ac...

Страница 15: ...on off switch in the power circuit of the D4 470 This will make it easier to cycle power to the unit when necessary The D4 470 s internal power supply distributes power to the CPU board the CPU fan t...

Страница 16: ...devices for more information about developing or connecting to an Ethernet network This port is also compatable with standard hubs routers etc Connect the Y adapter that came with the D4 470 to the P...

Страница 17: ...not supported by WindowsR NT An active DL405 expansion port is located next to the power connections This port is provided for future use by PC based Control developers Software drivers are not curre...

Страница 18: ...Cards Max 5 VDC 8 A 12 VDC 2 1 A 12 VDC 0 08 A Acceptable External Power Drop Max 10 ms Operating Temperature 41 122 F 5 50 C Storage Temperature 4 140 F 20 60 C Operating Humidity 30 80 Storage Humi...

Страница 19: ...nector Keyboard Mouse Port PC AT keyboard supported Mini DIN 6 pin D4 470 comes with Y adapter cable Mini DIN 6 pin to DIN 5 pin Mini DIN 6 pin A keyboard and mouse can be used simultaneously with thi...

Страница 20: ...122H x 338L mm PCI slot x 2 4 8H x 7 1L inches 122H x 180L mm 4 8H x 6 7L inches 122H x 170L mm ISA slot x 1 4 8H x 7 3L inches 122H x 185L mm RTC CMOS Backup Lithium battery on the CPU board Battery...

Страница 21: ...and Specifications Installation and Safety Guidelines Installation Wiring 2 10 Installation Wiring and Specifications Dimensions...

Страница 22: ...alling Hardware Accessories 3 In This Chapter Adding Third party Boards to Expansion Slots Installing Additional RAM Memory CPU Board and DIMM Sockets Powering Internal and External Devices Changing t...

Страница 23: ...pment damage always turn off the system power before opening the case of the D4 470 and before connecting peripheral devices to the D4 470 As you will notice in the photo below we removed the backplan...

Страница 24: ...nock out panel from the case using a blade screwdriver or similiar tool After prying out the Knock out press your expansion board firmly into the card edge connector A screw is provided to secure the...

Страница 25: ...r to installing the DIMMs first make sure the two handles of the DIMM socket are in the open position i e the handles lean outward Slide the DIMM slowly along the plastic guides on both ends of the so...

Страница 26: ...uate to power internal accessory devices Use external power only for CD ROM drives and other external devices The D4 470 power supply is not designed to power external devices Changing the CPU Because...

Страница 27: ...1A European Union Directives CE In This Appendix European Union EU Directives Basic EMC Installation Guidelines...

Страница 28: ...uropean Economic Area EEA and all are covered by the Directives There are several Directives that apply to our products Directives may be amended or added as required S Electromagnetic Compatibility D...

Страница 29: ...082 1 Generic immunity standard for residential commercial and light industry EN50082 2 Generic immunity standard for industrial environment S Low Voltage Directive Standards Applicable to PLCs EN6101...

Страница 30: ...is The Office for Official Publications of the European Communities L 2985 Luxembourg quickest contact is via the World Wide Web at http euro op eu int indexn htm Another source is British Standards I...

Страница 31: ...e varistor with a rating of 275VAC working voltage for 230V nominal supplies 150VAC working voltage for 115V supplies and high energy capacity eg 140 joules Transient suppressors must be protected by...

Страница 32: ...d to the PLC The diagram shows an example of four physical locations connected by a communications cable Screened Cable Equi potential Bond Control Cubicle To Earth Block Conductive Adapter Serial I O...

Страница 33: ...non European installations using single end earth grounds and sites with far from ideal earth ground characteristics we recommend the addition of 100 ohm resistors at each 0V link connection in netwo...

Страница 34: ...ck and power breaker If access is required by operators or untrained personnel the equipment must be installed inside an internal cover or secondary enclosure S It should be noted that the safety requ...

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