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312 • Application in Explosive Environments

8.5 Identification

8.5.1For Europe

According to CENELEC and IEC

Explosion protection group

Unit category

Community symbol for explosion protected electrical components

II 3 G

 

KEMA 01ATEX1024 X

 

EEX nA II T4

Temperature class

Approval body and/or number of the examination certificate

Explosion protection group

E = conforming with European standards Ex = explosion protected component

n = Type of ignition

Extended identification

ITEM-NO.:750-400

24V DC AWG 28-14 55°C max ambient

CL I DIV 2 Grp. A B C D op temp code T4A

LISTED 22ZA AND 22XM

-02----03

4246

1-

2

090

 

Hansastr. 27

2DI 24V DC 3.0ms

 

D-32423 Minden

0.08-2.5mm2

0V 24V DI1

Di2

PATENTS PENDING

II 3 G

KEMA 01ATEX1024 X EEx nA II T4

Fig. 8-1: Example for lateral labeling of bus modules

 

(750-400, 2 channel digital input module 24 V DC)

g01xx03e

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Application in Explosive Environments • 313

8.5.2For America

According to NEC 500

Explosion protection group

Area of application (zone)

(condition of use category)

 

Explosion group

CL I DIV 2

 

Grp. ABCD

 

(gas group)

 

optemp code T4A

Temperature class

 

24V DC AWG 28-14 55°C max ambient

CL I DIV 2 Grp. A B C D op temp code T4A

LISTED 22ZA AND 22XM

-02----03

4246

0-

2

410

 

 

ITEM-NO.:750-400

Hansastr. 27

2DI 24V DC 3.0ms

 

D-32423 Minden

0.08-2.5mm2

0V 24V DI1

Di2

PATENTS PENDING

II 3 G

KEMA 01ATEX1024 X EEx nA II T4

Fig. 8-2: Example for lateral labeling of bus modules

 

(750-400, 2 channel digital input module 24 V DC)

g01xx04e

Modular I/O System

ETHERNET TCP/IP

314 • Application in Explosive Environments

8.6 Installation regulations

In the Federal Republic of Germany, various national regulations for the installation in explosive areas must be taken into consideration. The basis being the ElexV complemented by the installation regulation DIN VDE 0165/2.91.

The following are excerpts from additional VDE regulations:

DIN VDE 0100

DIN VDE 0101

DIN VDE 0800

installation in power plants with rated voltages up to 1000 V

installation in power plants with rated voltages above 1 kV

installation and operation in tele-communication plants including information processing equipment

DIN VDE 0185 lightning protection systems

The USA and Canada have their own regulations. The following are excerpts from these regulations:

NFPA 70

ANSI/ISA-RP 12.6-1987

National Electrical Code Art. 500 Hazardous Locations

Recommended Practice

C22.1

Canadian Electrical Code

 

 

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Application in Explosive Environments • 315

Danger

For the use of WAGO-I/O SYSTEM 750 (electrical operating means) with Ex approval the observance of the following points is mandatory:

•The electrical operating means are exclusively suitable for applications in explosion endangered areas (Europe Group II, Zone 2 or America: Class I, Division 2, Group A, B, C, D) or in non explosion endangered areas!

•Ensure that only approved modules of the electrical operating means will be used. Replacement of components can jeopardize the suitability of the system in explosion endangered zones!

•Only disconnect and/or connect electrical operating means when the voltage supply is isolated or when a non-explosive atmosphere has been ascertained!

•Adhere to the specified data regarding voltage supply and fusing. (See data on the fuse holder)!

i

 

Further Information

 

Proof of certification is available on request.

 

 

Also take note of the information given on the module technical information

 

 

 

 

sheet.

 

 

 

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316 • Glossary

9 Glossary

B

Baseband

Systems which operate without carrier frequencies, i.e. with unmodulated signals. Therefore, they only offer one channel which has to be logically tailored to the various requirements. Opposite: Wideband.

Bit

Smallest information unit. Its value can either be 1 or 0.

Bit rate

Number of bits transmitted within a time unit.

BNC

Bayonet Navy Connector. Socket for coaxial cable.

BootP

the bootstrap protocol is a protocol which specifies how system and network information is to be transmitted from a server to work stations.

Bridge

Connects two separate networks.

Broadcast

Message which is sent to all stations connected to the network.

Bus

A structure used to transmit data. There are two types, serial and parallel. A serial bus transmits data bit by bit, whereas a parallel bus transmits many bits at one time.

Byte

Binary Yoked Transfer Element. A byte generally contains 8 bits.

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