Xtralis VESDA VLC-500-EX Product Manual

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Xtralis VESDA VLC-500-EX Product Manual Manual pdf 27 page image

VESDA by Xtralis VESDA VLC-EX Product Guidewww.xtralis.com 196 Wiring Connections6.1 Termination CardThe Termination Card acts as the interface for VESDAnet (VN Model), VESDA Link (RO Model), powersupply terminals, relay and relay terminals.Since the VLC-EX is designed to be applied in an environment where there is potentially a hazardousatmosphere, it is important that all users are aware of and follow the guidance given in the appropriatestandards, including in: EN 60079-17:2007, “Explosive atmospheres. Electrical installations inspection andmaintenance” and that they also adhere to the specific rules and regulations for the site where the product isdeployed.This requires that the product be used with cable glands which are rated for the environment and are sizedcorrectly for the cables to be used to connect the unit. Care must be taken to terminate and restrain the fieldwiring, such that it cannot be pulled out of the cable gland or the terminal strip.Notes:l All unused cable entries, i.e. those without a cable/cable gland, must be fitted with a suitable blankingplug in order to maintain the case seal.l The screw terminal blocks on the termination card are designed to accept conductors in the range 0.2–2.5 sq mm (30–12 AWG). In accordance with EN 60079-15:2011, clause 7.2.3, ferrules must be usedwhen multi-strand wire is used.l The rating of the VESDA VLC-EX include some intrinsic safety concepts (ic) in that the reset switchused is not gas tight but is connected to internal circuits that keep the energy at the switch contacts lowenough to avoid any sparking. Thus the ic rating does not require the use of Zener barriers of similarenergy limiting devices for the electrical connections (power and signaling) to the VESDA VLC-EX.Terminal A Terminal B1 Bias (-) (GND) 1 Shield2 Reset (-) (GPI) 2 VESDAnet A (-)3 Reset (+) (GPI) 3 VESDAnet A (+)4 Bias (+) 4 Shield5 LED (-) (GND) 5 VESDAnet B (-)6 LED (+) 6 VESDAnet B (+)7 FIRE (NO) 7 Power (-)8 Fire (C) 8 Power (+)9 Pre-Alarm (NO) 9 Power (-)10 Pre-Alarm (C) 10 Power (+)11 Fault (NO) NC = Normally CloseNO = Normally OpenC = Common12 Fault (C)13 Fault (NC)LegendA Terminal A D 1.6 Amp FuseB Terminal B E VESDAnet SocketC RelaysFigure 6-1: VESDA VLC-EX termination card VN Model (VLC-505-EX)