SVI-II Instruc Man.book - Fagerberg
SVI-II Instruc Man.book - Fagerberg
SVI-II Instruc Man.book - Fagerberg
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HART Communications with Intrinsic Safety<br />
Modem and Computer Use in Intrinsically Safe Circuits<br />
Modem and<br />
Computer Use<br />
in Intrinsically<br />
Safe Circuits<br />
<strong>Man</strong>y HART modems that are in use today are not approved for connections<br />
to Intrinsically Safe control circuits. Most portable computers are NOT<br />
approved for use in hazardous areas. Modems can be safely connected to the<br />
safe area side of barriers, and isolators. Observe requirements for the HART<br />
filter.<br />
MACTek ® Intrinsically Safe modem, Model 010005<br />
MACTek Warning<br />
The VIATOR RS232 HART Interface [Eex ia] <strong>II</strong>C complies with the Essential<br />
Health and Safety Requirements relating to the design and construction of<br />
equipment and protective systems intended for use in potentially explosive<br />
atmospheres. Requirements given in Annex <strong>II</strong> of the Directive 94/9/EC (ATEX<br />
Directive) of the European Parliament and the Council of 23 March 1994.<br />
Consult MACTek Corporation, http://www.mactekcorp.com/company.html for<br />
detailed requirements for safe use.<br />
"This product has not been tested by any certification agency such as Factory<br />
Mutual with jurisdiction outside the European Union for intrinsic safety. The<br />
product can be used outside the European Union (e.g. in the USA) on the sole<br />
authority of the buyer. MACTek makes no claims of suitability and offers no<br />
warranties regarding the use of this product for connection of PCs to circuits<br />
extending into hazardous areas in countries outside the European Union."<br />
Do not connect a PC or HART modem to an intrinsically safe circuit except on<br />
the safe area side of a barrier. Do not operate a PC in a hazardous area<br />
without compliance with local and plant regulations.<br />
Use of Handheld Communicators In Intrinsically Safe Circuits<br />
The HC375 is not approved for use in hazardous areas that use explosion<br />
proof safety practices. Do not use the HC375 unless the area has been<br />
declared safe (Hot Work Permit).<br />
The HART Communicator HC375 is approved to communicate with<br />
intrinsically safe control circuits in hazardous areas. Read the product <strong>Man</strong>ual<br />
for the HART Communicator. Observe all warnings. The intrinsic safety entity<br />
parameters must be added to the <strong>SVI</strong> <strong>II</strong> AP entity parameters to determine<br />
suitability for use in any intrinsically safe circuit. Observe the labels on the<br />
HC375 or consult the manufacturer.<br />
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