5 Fieldbus Technology

Transcription

1 5 Fieldbus Technology Ex e / Ex i 10922E00 The s Ex e/ex i connect intrinsically safe Foundation Fieldbus H1 or Profibus PA field devices to a non-intrinsically safe / Ex e trunk. Up to four intrinsically safe FISCO spurs are powered with 40 ma each, adequate for one field device and an additional hand-held terminal. A feedback effect from the spurs on the trunk is prevented in the case of short-circuits current limiting (spur protection). The intrinsically safe spurs comply with FISCO specifications and are electrically isolated from the trunk. The s feature a power management to minimise current from the trunk. The couplers are mounted on DIN rail or directly in housings made of glass fibre reinforced polyester or stainless steel. The cable shields can be connected to earth capacitively at the terminals or directly at the cable screen bus bar. An IP 30 cover protects the non-intrinsically safe connections of the trunk so that work can be carried out at any time on the intrinsically safe spurs. For Foundation Fieldbus H1 and Profibus PA, acc. to IEC Connects up to 4 intrinsically safe FISCO field devices to a non intrinsically safe / Ex e fieldbus Installation in Zone 1 and Zone 2 Zone 21 and Zone 22 Class I Zones 1, 2 and Division 2 Isolation between intrinsically safe field devices and non intrinsically safe fieldbus 40 ma current each spur; spur protection Low starting and low fault current by power management Capacitive or direct earthing of cable screens LED indication for status and faults on each spur Switchable termination on board Screw or cage clamp terminals Customer specific field housings in different versions available 5/1Zones 1 & 2, 21 & 22

2 Ex e / Ex i 5 Selection table Version Field enclosure Number of channels (spurs) without enclosure built-in enclosure Connection terminals Ordering code without, DIN rail mount 4 screw type 9411/ cage clamp 9411/ in polyester 4 screw type 9411/ cage clamp 9411/ in stainless steel 4 screw type 9411/ cage clamp 9411/ Explosion protection coupler mounted on DIN rail: coupler built-in in enclosure: E II 2 (1) G D Ex mb e ib [ia] IIC/IIB T4 T a = - 20 C C Spurs FISCO acc. to IEC suitable enclosure neccessary (e.g. R. STAHL Series 8146 or Series 8125) E II 2 (1) G D Ex mb e ib [ia] IIC/IIB T4 E II 2 D IP 6X T80 C T a = - 20 C C Spurs FISCO acc. to IEC Installation Safety data (CENELEC) each Spur Max. voltage U 0 Max. current I 0 Max. power P 0 Max. connectable capacitance C 0 for IIC / IIB Max. connectable inductance C 0 for IIC / IIB Max. internal capacitance C i Max. internal inductance L i Insulation voltage U m Power supply Galvanic transmission Ex i spurs to Ex e trunk Ex i spur to Ex i spur Data transmission between trunk and spurs in Zones 1 and 2, Zones 21 and 22 (dust), Class I, Zones 1 and 2, Class I Division 2 and in the safe area FISCO (IEC ) 15.7 V 245 ma 960 mw 476 nf / 2878 nf 0.58 mh / 2.9 mh 1.1 nf ~ 0 mh 253 V no need, the is powered from the trunk Test voltage acc. to EN kv AC no isolation passive, no repeater function 5/2

3 5 Ex e / Ex i Trunk, non intrinsically safe / Ex e Connections Voltage range Low voltage monitoring Max. DC current 2 trunk connections (in, out), internally interconnected 16 V V U < 16 V, spurs deenergized at 16 V at 24 V at 32 V 0 ma each spur 28 ma 24 ma 22 ma 20 ma each spur 120 ma 80 ma 65 ma 40 ma each spur 220 ma 140 ma 105 ma 3 sprus á 40 ma, 235 ma 150 ma 105 ma 1 spur in short-circuit short-circuit all spurs < 80 ma < 60 ma < 50 ma Max. power dissipation Indication Reverse polarity protection Max. number of s 1.4 W LED green PWR (U ) 16 V on trunk) yes 4 per trunk Termination The s have a built-in termination resistor 100 Ohm + 1 uf (IEC ). 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 Max. cable length Output voltage Current range Min. no-load voltage Max. internal resistance Max. short-circuit current Indication each spur Earthing of cable screens (trunk and spurs) Direct earthing Capacitive earthing Power management 1 per spur 120 m ) 10 V bei 40 ma per spur 0 ma ma per spur 12 V 65 Ohms 50 ma LED yellow S1... S4 on grounding bar over 4.7 nf at terminal S ; (grounding bolt M 6) remark: for types 9411/ and 9411/ (metal enclosure) the bolt is internally connected to the enclosure 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. 5/3

4 Ex e / Ex i 5 Error detection Spur short-circuit Error indication each spur Error indication all spurs Error indication Electromagnetic compatibility Ambient conditions ) 42 ma ma LED yellow S1... S4, blinking LED red ERR, blinking LED red ERR Ambient temperature - 20 C C Storage temperature - 20 C C Relative humidity (no condensation) Connection diagram Tested under the following standards and regulations: EN (IEC/EN and 11; EN class B); NAMUR NE 21 (IEC/EN , 8 and 11; EN class B) < 95 % 10911E02 Mechanical data Terminals 3 pole screw terminals cage clamp terminals (+, -, screen) trunk Ex e trunk Ex e spurs Ex i spurs Ex i rigid mm mm mm 2 flexible mm mm mm 2 flexible, end covering sleeves mm mm mm 2 Installation Mounting position Protection Enclosure IP 30 Intrinsically safe terminals on DIN rail, EN (NS 35/15, NS 35/7.5) or mounting plate horizontal or vertical IP 20 Ex e terminals IP 30 (enclosure may be opened in hazardous area under voltage) Fire protection class (UL-94) HB 5/4

5 5 Ex e / Ex i in built-in enclosure Installation enclosure material enclosure Series polyester 8146/ / / stainless steel 8125/ / / Degree of Protection IP 66 Cable entries cable glands Series x M 20 blue (Ex i spurs) 2 x M 20 black (Ex e trunk) 1 x M 16 black (earth) breathing gland Series x M 25 Dimension drawings (all dimensions in mm) - subject to alterations 9411/ and 9411/ without enclosure 10907E / and 9411/ Enclosure 8146/..61 incl E00 5/5

6 Ex e / Ex i 5 Dimension drawings (all dimensions in mm) - subject to alterations 9411/ and 9411/ Enclosure 8125/..61 incl E00 We reserve the right to make alterations to the technical data, weights, dimensions, designs and products available without notice. The illustrations cannot be considered binding. 5/6