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Field Device Coupler Ex e / Ex i Series 9411/21

Technical Data Trunk, non intrinsically safe / Ex e Professional connections 2 trunk connections (in, out), internally interconnected Voltage range 16 V ... 32 V Low voltage monitoring U < 16 V, spurs deenergized Max. DC current at 16 Vat 24 Vat 32 V0 mA each spur28 mA24 mA22 mA20 mA each spur120 mA80 mA65 mA40 mA each spur220 mA140 mA105 mA3 sprus á 40 mA,1 spur in short-circuit235 mA150 mA105 mAshort-circuit all spurs< 80 mA< 60 mA< 50 mA Max. power dissipation 1.4 W Indication PROFESSIONAL LED green „PWR“(U ) 16 V on trunk) Reverse polarity protection yes Max. number of Field Device Industrial couplers 4 per trunk Termination The Field Device Couplers have a built-in termination resistor 100 Ohm + 1 uF (IEC 61158-2). A jumper between terminals TERM 1 and 2 connects termination to the trunk. Spurs, intrinsically safe FISCO Ex i Number 4 Number of field devices 1 per spur Max. professional cable length 120 m Output voltage ) 10 V bei 40 mA per spur Current range 0 mA ... 40 mA per spur Min. no-load voltage 12 V Max. internal resistance 65 Ohms Max. short-circuit current 50 mA Indication each spur LED yellow „S1“ ... „S4“ Earthing of cable professional screens (trunk and spurs) Direct earthing on grounding professional bar Capacitive earthing over 4.7 nF at professional terminal „S“; (grounding suppliers of bolt M 6) remark: for types 9411/21-212-31 and 9411/21-222-31 (metal enclosure) the bolt is internally connected to the enclosure Power management When the trunk voltage exceeds 16 V the spurs are energized one after the other to avoid high starting current resulting from field devices. A short circuit detected on a spur will deenergize the respective spur until the short-circuit is removed. Regardless how many spurs are short-circuited the trunk is loaded with max one spur short-circuit current. Thus the trunk current and the device power dissipation are minimized under all conditions.

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General Catalogue 23.02.2006