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Building Technologies A6V10257473_e_en_--
Fire Safety 2015-03-04
7.3.2 Wiring for explosion hazard areas
Fig. 16 Wiring for explosion hazard areas
In ex-areas, use only fire detectors that are approved for ex-areas. Between the
explosion-hazard area and the non-ex-area, the detector line must be galvanically
insulated (DC1192) and laid via a safety barrier (SB3). The termination element
EOL22Ex must be provided as line terminator.
Country-specific regulations always apply to installation in ex-areas.
The following document provides further informations:
Fire alarm signal in areas at risk of explosion - Principles, applications, installation,
maintenance (001204).
7.4 Monitored inputs
Four monitored inputs are available on X9 terminal block for the connection of
various devices. Operation is defined at programming steps 28 to 31 (see
paragraph 12.9).
Technical data common to the 4 inputs
EOL: 3.3 kΩ resistance connected at the end of the line
Line resistance max.: 80 Ω
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