DWEX DIGITAL LOUD-SPEAKING EXPLOSION PROOF CALL STATION
User Manual
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External appearance all versions of DWEx are given in Appendix A.
The design and material of the DW housing have impact and chemical resistance. The
DW housing is made of the specified TETRADUR F4401-2004 dielectric fiberglass-reinforced
polyester resin, which is resistant to solar ultraviolet radiation. Temperature range using of
TETRADUR F4401-2004 can be from 50 to 150 °.
Material composition:
resins <30%
thermoplastics <4%
styrene <12,5%
zinc stearate <0,5%
hardener <2,90%
fillers <58%
fiberglass <30%
Material’s main specifications:
dielectric strength IEC60243 25 kV / mm
tracking resistance index IEC 60112 600
tensile strength ISO527 50 MPa
material density ISO1183 1,68 g/сm
3
flexural strength ISO178 110 MPa
Coverage ogranosilicate composition "Antistatic OS", color according RAL2004 −
orange.
To ensure the protection degree IP66 DWEx unit in compliance with requirements of
standards GOST 14254-2015 (standards – МЭК 529, DIN VED 0470 Pat1,
EN60529:1991/А2:2013, IEC 529), sealing rubber and silicone gaskets are placed under the
cover, speaker and microphone, switch mechanisms and cable glands.
DWEx can operate only under control of the central exchange of the communication
systems DCN or subscriber module IPN-8U, and it is unable to perform any functions without
connection to the communication system via the digital Uk
0
-interface.
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