Data heet PROFIU Junctions, Connectors, ccessories PROFIU P Junctions Connectors ccessories PROFIU DP Junctions Connectors ccessories PROFIU DP/P ccessories P R O F I PROCE FIELD U U
PROFIU Junctions, Connectors, ccessories PROFIU P The PROFIU P T-Connectors are available as tandard and Ex(Haz.) version. They are used for coupling 1 up to 4 transmitters to the P trunk via spurs. The spurs can optionally be connected by an M1 connection or directly via the EMC cable gland. Non-interrupted U operation when exchanging or extending a P transmitter Easy to use Low installation costs External grounding cable Pressure-compensation element EMC cable gland Tension spring connection luminium (standard) housing Non-Ex design (integrated bus termination, switchable) Ex(Haz.) design acc. to TEX (external bus termination with NPZ100-EX) NPJ10-NO, NPJ130-NO, NPJ40-NO, NPJ460-NO PROFIU P Junctions - Non-Ex version Recommendation of mounting hield is connected to the enclosure via the EMC cable glands. Thread the cable gland onto the seal, on the unprepared fieldbus cable trip fieldbus cable here Use ferrules! Fieldbus cable hielding Draw back the shielding braid 8 50 70 over the sheath of the fieldbus cable 6 Technical data Temperature range Operating temperature -40...+85 C Type of protection IP 66 Material of housing high-quality aluminium alloy (L-i 1) urface stove-enamelled RL 7001 PROFIU P connection tension spring 0.5...1.5 mm Cable bushing EMC cable gland M16 Clamping area 5.5...9.6 mm Measuring instrument connector M1 x 1, 4pin contacts brass, surface CuZnu Installation advice Torques M16 cable gland on housing Coupling ring M16 cable gland Housing lid External earthing cable 6.5 Nm 4.5 Nm 1.8...0 Nm 1.8...0 Nm
PROFIU Junctions, Connectors, ccessories PROFIU P NPJ10-NO (JPN10) PROFIU P Junction Non-Ex version, with bus termination The Transmitter (spur, 1-way) are connected using M1 connection. 58 off on R1 C1 36,5 ocket M1 / P code Wire bridge us Terminator 100R off on R1 C1 1uF 50Vdc us terminator: 64 off on Enclosure P- (3) hielding(4) P+ (1) () NPJ130-NO (JPN130) PROFIU P Junction Non-Ex version, with bus termination The Transmitter (spur, 1-way) are connected using cable bushing. 58 80 80 off on off 64 on R1 R1 C1 15 C1 36,5 36,5 36,5 us terminator: off off on us terminator: on Wire bridge Enclosure Enclosure Wire bridge us Terminator 100R NPJ40-NO (JPN40) PROFIU P Junction Non-Ex version, with bus termination The Transmitter (spurs, 4-way) are connected using M1 connection. ocket M1 / P code NPJ460-NO (JPN460) PROFIU P Junction Non-Ex version, with bus termination The Transmitter (spurs, 4-way) are connected using cable bushing. Wire bridge off on R1 C1 1uF 50Vdc P- (3) hielding(4) P+ (1) () us Terminator pluggable 100R 1uF 63V P- (3) hielding(4) P+ (1) () us Terminator pluggable 100R 1uF 63V off on R1 C1 15 ll drawings not scaled! ll units in millimeter! us terminator: off on Enclosure P- (3) hielding(4) P+ (1) () 3
PROFIU Junctions, Connectors, ccessories PROFIU P NPJ10-EX, NPJ130-EX, NPJ40-EX, NPJ460-EX PROFIU P Junctions Ex area EEx (ia) TEX Recommendation of mounting: hield is connected to the enclosure via the EMC cable glands. Thread the cable gland onto the seal, on the unprepared fieldbus cable trip fieldbus cable here Use ferrules! Fieldbus cable hielding Draw back the shielding braid 8 50 70 over the sheath of the fieldbus cable 6 Technical data Temperature range Operating temperature -40...+80 C Type of protection IP 66 Material of housing high-quality aluminium alloy (L-i 1) urface stove-enamelled RL 5015 PROFIU P connection tension spring 0.5...1.5 mm Cable bushing EMC cable gland M16 Clamping area 5.5...9.6 mm Measuring instrument connector M1 x 1, 4pin contacts brass, surface CuZnu TEX Certification II G EEx ia IIC T6 Installation advice Torques M16 cable gland on housing Coupling ring M16 cable gland Housing lid dapter / spur cable External earthing cable 6.5 Nm 4.5 Nm 1.8...0 Nm hand-tight 1.8...0 Nm 4
PROFIU Junctions, Connectors, ccessories PROFIU P NPJ10-EX (JPE10-Ex) PROFIU P Junction Ex area EEx (ia) TEX, without bus termination The Transmitter (spur, 1-way) are connected using M1 connection. 36,5 58 64 ocket M1 / P code us terminator: With external NPZ100-EX only Wire bridge Enclosure P- (3) hielding(4) P+ (1) () NPJ130-EX (JPE130-Ex) PROFIU P Junction Ex area EEx (ia) TEX, without bus termination The Transmitter (spur, 1-way) are connected using cable bushing. 58 80 80 NPJ40-EX (JPE40-Ex) 64 15 NPJ460-EX (JPE460-Ex) 15 ll drawings not scaled! ll units in millimeter! 36,5 36,5 36,5 us terminator: With external NPZ100-EX only PROFIU P Junction Ex area EEx (ia) TEX, without bus termination The Transmitter (spurs, 4-way) are connected using M1 connection. us terminator: With external NPZ100-EX only us terminator: With external NPZ100-EX only ocket M1 / P code Wire bridge Enclosure Enclosure Wire bridge P- (3) hielding(4) P+ (1) () PROFIU P Junction Ex area EEx (ia) TEX, without bus termination The Transmitter (spurs, 4-way) are connected using cable bushing. Wire bridge Enclosure P- (3) hielding(4) P+ (1) () P- (3) hielding(4) P+ (1) () 5
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PROFIU Junctions, Connectors, ccessories PROFIU P NPZ100-EX (PE100-Ex) PROFIU P us Terminator Ex area EEx (ia) TEX Cable brown Cable white Technical data Temperature range/operating temperature -40...+80 ºC Type of protection IP 66 Material of housing high-quality aluminium alloy (L-i 1) urface black powder coated Connecting cable x 0.14 mm Cable bushing us adapter M16 TEX Certification II G EEx ia IIC T6, II G EEx m II T6 Installation advice Torques M16 adapter on the housing External earthing cable (if necessary) 6.0 Nm 1.8...0 Nm 45 0 30,5 II G EEx ia IIC T6 EEx m II T6 Ui 17,5 V 10 30 V Ii 380 m Ta : -40 80 C KEM 01 TEX 1058 X 0344 49 30,5 ll drawings not scaled! ll units in millimeter! 7
PROFIU Junctions, Connectors, ccessories PROFIU P NPE100-NE (EPG100) PROFIU P Plug - M1, metal case, for Ex (Haz.) and Non-Ex area Technical data Poles 4 Poles, P code Type of connection screwed Cross-sectional area of connection 0.75 mm Connecting thread M1 Contact surface CuZnu Housing protection to DIN 40050 IEC 59 IP 67 with cable Ø 4...9 mm Material of housing Cu Zn surface nickel Inflammability to UL-94 V- Operating temperature -5 C...+85 C Rated current per contact 3 Nominal voltage to VDE standard 0110/IO group C 15 V ~ 150 V = Tracking resistance KC 600 Volume resistivity to IEC51 part 8 MΩ Insulation resistance to IEC 51 part 1 10 Ω Installation advice crew terminals Torques 0.4 Nm Coupling ring PG cable gland 4.0 Nm Knurled screw hand-tightl Dimensions Recommendation of mounting ca. 59 M1 x 1,5 Ø 40 +1 ll drawings not scaled! ll units in millimeter! 4 Use wire-end ferrules! Put isolating tube over the shield! 4 1 3 Frontview of plug and socket connector -pole fieldbuscable with shield (diameter about 8 mm ). Mounting by customer. Pressure screw Terminal clamp Washer hieldring with washer Wreath M16 x 0,75 Coupling sleeve M18 / M16 x 0.75 with mounted sleeve Wreath M18 Pins with screwed connection Wreath M18 outside Fixed screw Revolving screw Wreath M1 x 1 Male 1 3 4 wire-colour red not used green bus P+ Pshield referenz equense of mounting: 1. Put the fieldbuscable through pressure screw, terminal clamp, washer, shieldring with washer.. Caution: Only for EMV! trip the fieldbuscable here, lay the shield over the shieldring. Cut the rest of the shield. hield can be connected, as drawing, with pin of the plug and socket connector. Prepare the cable as shown in the drawing. 3. Put prepared ends of the cable through the coupling sleeve. It s possible to use an isolating tube for the cable ends. Put shieldring with washer and shield into the coupling sleeve. Put washer, terminal clamp and pressure screw together. Then fix the pressure screw. 4. Fix the cable ends at the pins,, of he plug and socket connector. crew coupling sleeve and part with pins,, together. crew Positionmark! 1 4 3 View to connecting piece PROTECTION REMRK TO DIN 34 MUT E OERVED 8
PROFIU Junctions, Connectors, ccessories PROFIU P NPE300-NE (EPG300) PROFIU P ocket M1, metal case, for Ex (Haz.) and Non-Ex area Technical data Poles 4 Poles, P code Type of connection screwed Cross-sectional area of connection 0.75 mm Connecting thread M1 Contact surface CuZnu Housing protection to DIN 40050 IEC 59 IP 67 with cable Ø 4...9 mm Material of housing Cu Zn surface nickel Inflammability to UL-94 V- Operating temperature -5 C...+85 C Rated current per contact 3 Nominal voltage to VDE standard 0110/IO group C 15 V ~ 150 V = Tracking resistance KC 600 Volume resistivity to IEC51 part 8 MΩ Insulation resistance to IEC 51 part 1 10 Ω Installation advice Torques crew terminals 0.4 Nm Coupling ring PG cable gland 4.0 Nm Knurled screw hand-tight Dimensions Recommendation of mounting -pole fieldbuscable with shield (diameter about 8 mm ). Mounted by customer. Pressure screw Terminal clamp Washer Recommendation of mounting: 1. Put the fieldbuscable through pressure screw, terminal clamp, washer, shieldring with washer.. Caution: Only for EMV! trip the fieldbuscable here and lay the shield over the shieldring. Cut the rest of the shield. hield can be connected, as drawing, with socket. Prepare the cable as shown in the drawing. ~ 54,5 Ø M1 x 1 40 +1 ll drawings not scaled! ll units in millimeter! 4 Put wire-end ferrule above the wires Put isolating tube over the shield! Frontview of the socket Positionmark 1 4 3 hieldring with washer Wreath M16 x 0,75 Coupling sleeve M18 / M16 x 0.75 with mounted sleeve Wreath M18 socket for screwed connection Wreath inside M18 Fixed screwl Revolving screw Wreath inside M1 x 1 Male 1 3 4 wire-colour red not used green bus P+ Pshield referenz 3. Put prepared wires and perhaps isolated shield through the coupling sleeve. Put shieldring with washer and shield into the coupling shield. Put washer, terminal clamp and pressure screw together. Then fix the pressure screw. 4. Fix the cable ends at the socket pins,,. crew the coupling sleeve and the part with the sockets together. View to connecting piece crew PROTECTION REMRK TO DIN 34 MUT E OERVED 4 1 3 Positionmark 9
PROFIU Junctions, Connectors, ccessories PROFIU DP The PROFIU DP T-Connectors are available as luminium and tainless teel version. They are used for coupling one transmitter to the DP trunk via spurs. The spurs can optionally be connected by an M1 connection or directly via the EMC cable gland (for luminium version only). Non-interrupted U operation when exchanging a DP transmitter, as well as the last DP Transmitter by an active bus termination. Easy to use Low installation costs External grounding cable Pressure-compensation element EMC cable gland (for luminium version only) Tension spring connection tandard design (integrated bus termination) Version as active bus termination (integrated Power supply) luminum (tandard) and tainless teel version NDJ10-NO, NDJ1-NO, NDJ130-NO, NDJ13-NO PROFIU DP Junctions luminium housing Recommendation of mounting hield is connected to the enclosure via the EMC cable glands. Thread the cable gland onto the seal, on the unprepared fieldbus cable trip fieldbus cable here Fieldbus cable hielding Draw back the shielding braid 8 50 70 over the sheath of the fieldbus cable 6 Use ferrules! Technical data Temperature range Operating temperature -40...+85 C (NDJ10-NO, NDJ130-NO) -5...+70 C (Term 4 V: NDJ1-NO, NDJ13-NO) Type of protection IP 66 Material of housing high-quality aluminium alloy (L-i 1) urface stove-enamelled RL 7001 PROFIU DP connection tension spring 0.5...1.5 mm Cable bushing EMC cable gland M16 Clamping area 5.5...9.5 mm Transmitter connector M1 x 1, 5pin, DP code contacts brass, surface CuZnu upply voltage Term 4 V 4 V DC +/-10% Charing rate at supply unit 4 V DC Ie = 10 m +15% at bus utilisation until 3 participants pur lines (L ) until 1500 kit/s! Installation advice Torques M16 cable gland on housing Coupling ring M16 cable gland dapter spur cable Housing cover External earthing connection per spur max. 0.5 m, max. Over-all spur lines 6.60 m per DP segment 6.5 Nm 4.5 Nm hand tight 1.8...0 Nm 1.8...0 Nm 10
PROFIU Junctions, Connectors, ccessories PROFIU DP NDJ10-NO PROFIU DP Junction luminium housing, without bus termination The Transmitter (spur, 1-way) are connected using M1 connection. 36,5 58 64 ocket M1 / DP code (1) -> () -> RxD/TxD-N (3) -> n.c (4) -> RxD/TxD-P (5) -> hield / chirm NDJ1-NO PROFIU DP Junction luminium housing, with active bus termination (4 V DC) The Transmitter (spur, 1-way) are connected using M1 connection. 36,5 ocket M1 / DP code 58 64 (1) -> () -> RxD/TxD-N (3) -> n.c (4) -> RxD/TxD-P (5) -> hield / chirm NDJ130-NO PROFIU DP Junction luminium housing, without bus termination The Transmitter (spur, 1-way) are connected using cable bushing. 36,5 58 64 NDJ13-NO PROFIU DP Junction luminium housing, with active bus termination (4 V DC) The Transmitter (spur, 1-way) are connected using cable bushing. 36,5 58 64 ll drawings not scaled! ll units in millimeter! 11
PROFIU Junctions, Connectors, ccessories PROFIU DP NDJ10-NO, NDJ1-NO PROFIU DP Junctions tainless steel housing Recommendation of mounting Pressurescrew, rubber washer must be put on the unprepared fieldbus cable tripped fieldbus cable hield will be connected with terminal to the housing Use ferrules! Technical data Temperature range Operating temperature -40...+85 C (NDJ10-NO) -5...+70 C (Term 4 V: NDJ1-NO) Type of protection IP 66 Material of housing stainless steel 1.4571 urface polished PROFIU DP connection tension spring 0.5...1.5 mm Cable bushing plastic screwed cable gland M16 Clamping area 5.5...9.5 mm Transmitter connector M1 x 1, 5pin, DP code upply voltage Term 4 V 4 V DC +/-10% Charing rate at supply unit 4 V DC Ie = 10 m +15% at bus utilisation until 3 participants pur lines (L ) until 1500 kit/s! per spur max. 0.5 m, max. Over-all spur lines 6.60 m per DP segment Installation advice Torques M16 plastic screw cable gland on housing Coupling ring M16 cable gland dapter spur cable Housing cover External earthing connection 3.75 Nm.5 Nm hand tight 1.8...0 Nm 1.8...0 Nm 1
PROFIU Junctions, Connectors, ccessories PROFIU DP NDJ10-NO PROFIU DP Junction tainless steel housing, without bus termination The Transmitter (spur, 1-way) are connected using M1 connection. ocket M1 / DP code (1) -> () -> RxD/TxD-N (3) -> n.c (4) -> RxD/TxD-P (5) -> hield / chirm NDJ1-NO PROFIU DP Junction tainless steel housing, with active bus termination (4 V DC) The Transmitter (spur, 1-way) are connected using M1 connection. ocket M1 / DP code (1) -> () -> RxD/TxD-N (3) -> n.c (4) -> RxD/TxD-P (5) -> hield / chirm ll drawings not scaled! ll units in millimeter! 13
PROFIU Junctions, Connectors, ccessories PROFIU DP NDE100-NE PROFIU DP Plug M1, metal case, for Ex (Haz.) and Non-Ex area Technical data Poles 5 Poles, DP code Type of connection screwed Cross-sectional area of connection 0.75 mm Connecting thread M1 Contact surface CuZnu Housing protection to DIN 40050 IEC 59 IP 67 with cable Ø 4...9 mm Material of housing Cu Zn surface nickel Inflammability to UL-94 V- Operating temperature -5 C...+85 C Rated current per contact 3 Nominal voltage to VDE standard 0110/IO group C 15 V ~ 150 V = Tracking resistance KC 600 Volume resistivity to IEC51 part 8 MΩ Insulation resistance to IEC 51 part 1 10 Ω Installation advice crew terminals Coupling ring PG cable gland Knurled screw Torques 0.4 Nm 4.0 Nm hand-tight Dimensions ca. 59,5 Ø 4 1 M1 x 1 3 5 Frontview of plug and socket connector Male 1 3 4 5 wire-colour not used green not used red bus RxD/TxD-N RxD/TxD-P shield referenz ll drawings not scaled! ll units in millimeter! PROTECTION REMRK TO DIN 34 MUT E OERVED 14
PROFIU Junctions, Connectors, ccessories PROFIU DP PROFIU DP Connectors NDE10-NO NDE0-NO NDE30-NO pplication PROFIU DP Connector PROFIU DP Connector PROFIU DP Connector Internet http://www.abb.com/fieldbus http://www.abb.com/fieldbus http://www.abb.com/fieldbus Industrial lt enabled Information Level Yes Yes Yes Connector 9-pos. D-U male connector 9-pos. D-U male connector 9-pos. D-U male connector Programming connector -- -- 9-pos. D-U female connector Terminal resistance -- 0 Ω / 390 Ω, resistor can be enabled externally 0 Ω / 390 Ω, resistor can be enabled externally Cable feed selectable right or left, 35 selectable right or left, 35 left, 35 Terminal blocks crew-cage crew-cage crew-cage Conductor crosssection solid: 0.14...1.5 mm, flexible: 0.14...1 mm, WG: 6...16 solid: 0.14...1.5 mm, flexible: 0.14...1 mm, WG: 6...16 solid: 0.14...1.5 mm, flexible: 0.14...1 mm, WG: 6...16 Cable diameter max. / min.: 8 mm (± 0.4 mm) max. / min.: 8 mm (± 0.4 mm) max. / min.: 8 mm (± 0.4 mm) us cable The connector is specified for cable type according to EN 50 170 (see data sheet 10/63-6.46 EN) Temperature range -0...+70 C -0...+70 C -0...+70 C Degree of protection IP 40 IP 40 IP 40 Housing material, metal-plated, metal-plated, metal-plated Connector cycles > 00 > 00 > 00 Explosion protection -- -- -- FICO approval -- -- -- pproval CE acc. LVD CE (acc. LVD), UL, C-UL CE (acc. LVD), UL, C-UL (UL, C-UL in preparation) Protocol R 485 R 485 R 485 Max. aud Rate 1 Mbit/s 1 Mbit/s 1 Mbit/s Max. voltage 60 V C/DC 60 V C/DC 60 V C/DC Max. current 1 1 1 Function block diagram (NDE0-NO) Dimensional diagram Construction (NDE30-NO) * ) NDE30-NO ll units in millimeter! 15
PROFIU Junctions, Connectors, ccessories PROFIU DP/P NDZ411-NE (PG411) Protecting Cap for all plugs M1, plastic NDZ413-NE (PG413) Protecting Cap for all sockets M1, plastic 16
PROFIU Junctions, Connectors, ccessories PROFIU P Ordering information PROFIU P Junctions Catalog No. EUR Deliv. time NPJ10-NO (JPN10) (856406) 63644-9890101 8,40 * wks. P T(one-way) junction, x cable bushing and 1 x socket M1 incl. switchable bus termination NPJ130-NO (JPN130) (856409) 63644-989010 8,40 * wks. P T(one-way) junction, 3 x cable bushing incl. switchable bus termination NPJ40-NO (JPN40) (856408) 63644-9890103 15,00 * wks. P four-way junction, x cable bushing and 4 x socket M1 incl. switchable bus termination NPJ460-NO (JPN460) (856411) 63644-9890104 15,00 * wks. P four-way junction, 6 x cable bushing incl. switchable bus termination NPJ10-EX (JPE10-Ex) (856415) 63644-9890105 8,40 * wks. P T(one-way) junction, x cable bushing and 1 x socket M1 for the Ex area NPJ130-EX (JPE130-Ex) (856418) 63644-9890106 8,40 * wks. P T(one-way) junction, 3 x cable bushing for the Ex area NPJ40-EX (JPE40-Ex) (856417) 63644-9890107 15,00 * wks. P four-way junction, x cable bushing and 4 x socket M1 for the Ex area NPJ460-EX (JPE460-Ex) (85640) 63644-9890108 15,00 * wks. P four-way junction, 6 x cable bushing for the Ex area NPZ100-EX (PE100-Ex) (8606) 63644-989010 56,70 * wks. P bus termination for the Ex area, for junction modules NPJ 0-EX PROFIU P Connectors NPE100-NE (EPG100) (945564) 63644-9890115 15,50 * wks. P plug for cable, metal case, M1, for Ex and Non-Ex area NPE300-NE (EPG300) (846) 63644-9890116 18,50 * wks. P socket for cable, metal case, M1, for Ex and Non-Ex area 17
PROFIU Junctions, Connectors, ccessories PROFIU DP Ordering information PROFIU DP Junctions Catalog No. EUR Deliv. time NDJ10-NO (856435) 63644-9890109 110,00 * 3 wks. DP T(one-way) junction, x cable bushing and 1 x socket M1 without bus termination, aluminum housing NDJ1-NO (856433) 63644-9890110 16,00 * 3 wks. DP T(one-way) junction, x cable bushing and 1 x socket M1 incl. active fix bus termination (4 V DC supply), aluminum housing NDJ130-NO (856434) 63644-989011 97,90 * 3 wks. DP T(one-way) junction, 3 x cable bushing without bus termination, aluminum housing NDJ13-NO (85649) 63644-989013 13,00 * 3 wks. DP T(one-way) junction, 3 x cable bushing incl. active fix bus termination (4 V DC supply), aluminum housing NDJ10-NO (87147) 63644-9890111 140,00 * 5 wks. DP T(one-way) junction x cable bushing (plastic) and 1 x socket M1 (tainless steel) without bus termination, stainless steel housing NDJ1-NO (87145) 63644-989014 149,00 * 5 wks. DP T(one-way) junction x cable bushing (plastic) and 1 x socket M1 (tainless steel) incl. active fix bus termination (4 V DC supply), stainless steel housing PROFIU DP connectors NDE10-NO (PCO 010) (744597) 63644-9890117 8,80 * wks. DP plug, 9-pos. U-D, IP 40, max. 1 Md, 35 cable outlet without bus termination NDE0-NO (PCO 011) (7083) 63644-9890118 8,80 * wks. DP plug, 9-pos. U-D, IP 40, max. 1 Md, 35 cable outlet incl. switchable bus termination NDE30-NO (PCO 01) (70845) 63644-98901 36,10 * wks. DP plug, 9-pos. U-D, IP 40, max. 1 Md, 35 cable outlet incl. switchable bus termination, programming connection U-D 900-P910 see list 17.5 DP plug for EEx i (blue!). For operating the intrinsic safety PROFIU DP max. 1.5 Md, connectable terminating resistor NDE100-NE (178479) 63644-9890113 18,50 * 3 wks. DP plug for cable, metal case, M1, for Ex and Non-Ex area PROFIU general accessories Catalog No. EUR Deliv. time NDZ411-NE (PG411) (17815) Price and Catalog No. per cap 63644-989011 0,5 * wks. Packing unit 30 pcs., Order quantity: 30, 60, 90,...pcs. protecting cap for all plugs M1, plastic NDZ413-NE (PG413) (945605) Price and Catalog No. per cap 63644-98901 0,46 * wks. Packing unit 30 pcs., Order quantity: 30, 60, 90,...pcs. protecting cap for all sockets M1, plastic 18
has ales & Customer upport expertise in over 100 countries worldwide. www.abb.com/fieldbus The Company s policy is one of continuous product improvement and the right is reserved to modify the information contained herein without notice. Printed in the Fed. Rep. of Germany (01.05) 005 Rev. utomation Products GmbH orsigstr. 63755 lzenau Germany Tel: +49 551 905-534 Fax: +49 551 905-555 CCC-support.deapr@de.abb.com