Actuator controls

AUMATIC ACExC 01.2

Modbus RTU

To be used in combination with the operation instructions only!● The present short instructions do NOT replace the operation instructions!● They are only intended for persons already familiar with the operation instructions

where safety instructions, assembly, operation and commissioning are already describedin detail!

● The operation instructions must always be available.

FO connectionShort instructions

Table of contents Page

31. Short description...................................................................................................................

42. FO connection........................................................................................................................42.1. Basic information52.2. Terminal compartment: open62.3. FO cables: connect72.4. Terminal compartment: close

83. Network topologies................................................................................................................83.1. Line topology93.2. Star topology

104. Corrective action....................................................................................................................104.1. LED indications104.2. Troubleshooting104.2.1 Line and star topology

125. Technical data.........................................................................................................................125.1. FO coupler

136. Appendix.................................................................................................................................136.1. Calculation of achievable FO range146.2. Measuring methods146.3. Reference addresses146.4. Literature

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Table of contents

1. Short description

AUMA actuator controls with FO connection are intended for use in optical fieldbusnetworks.

The FO connection integrated in the electrical connection enables the conversionfrom electrical RS-485 signals into optical signals and vice versa.

FO connection behaviour is transparent at the bus, i.e. control of AUMA actuatorsvia bus is identical to control via copper cables (RS-485).

Contrary to RS-485 based systems, different topologies are possible:

● Line topology● Star topologyApart from the large distances, FO cables offer further advantages:

● In environments with electromagnetic interference● Lightning arrester or overvoltage protection● Equipotential earth bonding and earthing● Galvanic separation of the actuator● Use of common cable trenches for power and signal cables● Prevention of interference emissions along the transmission lineThis allows for customised solutions and various applications such as water/wastewater industries, tunnelling, power plants, thermal industry or telecontrol engineering.

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Short description

2. FO connection

2.1 Basic information

Hazardous voltage!

Risk of electric shock. Failure to observe this warning can result in death or seriousinjury.

→ The connection must be carried out exclusively by suitably qualified personnel.→ Prior to opening: Disconnect both system and device from the mains.→ Observe basic information contained in this chapter.→ Observe safety instructions contained in the operation instructions pertaining

to the actuator.

Eye damage caused by open fibre optic cable ends!

→ NEVER look directly into open cable ends or FO cable connections.

Connection or receive problems when ignoring the installation instructions!

→ Only use FO cable connection (connector types) with the wiring techniques in-dicated in these instructions.

→ Only mount connector types with locking mechanisms in the defined position.→ Protect unused FO cable connections against contamination or dust with protec-

tive caps/plugs supplied by the factory.→ Connect incoming FO cable with the optical receiver, the outgoing FO cable

with the optical sender. NOT vice versa!→ Do NOT kink FO cables! Observe bending radius of cable manufacturer.

Cable and wire types

Table 1: Cables and wires according toDIN VDE 0888 part 3:

62.5 µm or 50 µmCore diameter

62.5/125 µm Multi-mode graded-index fibre50/125 µm glass fibre

Fibre

62.5/125 µm: 2,600 m50/125 µm: 1,400 m

Range

Recommendation: < 3.0 dB/kmDamping coefficient

Remove outer sheathing of FO cable at a length of approx. 25 cm to enable ringwiring in the terminal compartment.

Figure 1: Plug type FSMA

Controls mounted to wall bracket

In the event of heavy vibration of the valve, we recommend mounting the actuatorcontrols separately from the actuator on a wall bracket. For information about thewall bracket, refer to operation instructions for the actuator.

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FO connection

2.2 Terminal compartment: open

Figure 2: Plug/socket connector: left KES, right KES flameproof

[1] Cover[2] Screws for cover[3] O-ring[4] Terminal compartment: Type of protection Ex e[5] Terminal compartment: Type of protection Ex d[6] Frame

Hazardous voltage!

Risk of electric shock.

→ Disconnect device from the mains before opening.

1. Loosen screws [2] and remove cover [1].

➥ Terminal compartments [4] and [5] are designed either in type of protection Exe (increased safety) or in type of protection Ex d (flameproof enclosure). Hereby,the flameproof interior compartment of the actuator (Ex d) remains closed.

2. Insert cable glands with Ex e approval and suitable for connection cables.

➥ The enclosure protection IP… stated on the name plate is only ensured if suita-ble cable glands are used. Example: Name plate shows enclosure protectionIP 68.

3. Seal cable entries unused cable entries with approved plugs suitable for therequired protection type.

4. Remove cable sheathing and insert the wires into the cable glands.5. Fasten cable glands with the specified torque to ensure required enclosure

protection.

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FO connection

2.3 FO cables: connect

1. Remove safety circlip and take FO coupler off top head rail.

Figure 3: FO coupler on top head rail

2. Place FO coupler on fixing plate in "parking position"

Figure 4: FO coupler in "parking position"

3. Insert FO cables through cable glands.4. Link FO connectors crosswise:

Optical output of actuator 1 with optical input of actuator 2.Optical input of actuator 1 with optical output of actuator 2.Figure 5: Connection example

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FO connection

2.4 Terminal compartment: close

Figure 6: Plug/socket connector: left KES, right KES flameproof

[1] Cover[2] Screws for cover[3] O-ring[4] Terminal compartment: Type of protection Ex e[5] Terminal compartment: Type of protection Ex d[6] Frame

1. Clean sealing faces of cover [1] and housing.2. Plug/socket connector designed as KES flameproof: Preserve joint surfaces

with an acid-free corrosion protection agent.3. Check whether O-ring [3] is in good condition, replace if damaged.4. Apply a thin film of non-acidic grease (e.g. petroleum jelly) to the O-ring and

insert it correctly.

Flameproof enclosure, danger of explosion!

Risk of death or serious injury.

→ Handle cover and housing parts with care.→ Joint surfaces must not be damaged or soiled in any way.→ Do not jam cover during fitting.

5. Fit cover [1] and fasten screws [2] evenly crosswise.

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FO connection

3. Network topologiesWhen connecting several field devices (actuators) in a network, the structure is callednetwork topology. AUMA offers different network topologies.

3.1 Line topology

Figure 7: Structure for line topology

Max. FO cable range in km (observe technical data!)[1] FO T-coupler within electrical connection of ACExC 01.2[2] FO PP-coupler within DCS (imperatively required)[3] FO PP-coupler for any Modbus RTU field device[4] Any Modbus RTU field device

Table 2: Number of FO devices (actuators) to be connected in series

Maximum number of FO devicesBaud rate [kbit/s]369.6

3619.2

3638.4

3657.6

18115.2

Special features of line topology

The optical signal is converted into an electrical signal at each device. Prior totransmission to the next device, the electrical signal is converted into an opticalsignal.

Interruption of an FO cable (case A) or failure of an FO connection board (case B)results in loss of control for the subsequent actuators:

Case A(standard)

As soon as the electrical connection is removed from the ACExC 01.2 , FO connectionof this actuator is no longer available. As a consequence, communication with thesubsequent actuators is lost. To prevent this, FO connection used in the ACExC01.2 can also be externally supplied with 24 V DC.

Case B(option)

As soon as the actuator is switched off (motor voltage), the FO connection board ofthis actuator is no longer available. As a consequence, communication with the

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Network topologies

subsequent actuators is lost. To prevent this, the complete ACExC 01.2 can beexternally supplied with 24 V DC.

3.2 Star topology

Figure 8: Structure for star topology

Max. FO cable range in km (observe technical data!)[1] FO PP-coupler within electrical connection of ACExC 01.2[2] LWL Stich-Koppler in der Leittechnik (zwingend erforderlich)[3] LWL Stich-Koppler für Beliebiges Modbus RTU Feldgerät[4] Any Modbus RTU field device

Table 3: Number of FO devices (actuators) to be connected in series

Maximum number of FO devicesBaud rate [kbit/s]369.6

3619.2

3638.4

3657.6

18115.2

Special features of star topology

Failure of an FO cable section or of an actuator's FO connection board has no impacton the operability of the remaining actuators.

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Network topologies

4. Corrective action

4.1 LED indications

Figure 9: LEDs on FO coupler

[BA] Bus active (yellow)[U]L Operation (green)

Table 4: Summary of functions

FunctionCo-lour

LED

LED flackert:Data from RS485 channel are transmitted via the optical interface.

yellowBA

LED is illuminated:Power supply (24 V DC) for FO coupler is availableInternal operating voltage (5 V) is available.

greenUL

4.2 Troubleshooting

LEDs on the FO couplers provide important information for troubleshooting. Thefollowing tables of this chapter provide basic steps for troubleshooting and eliminationvia these LEDs.

Furthermore, different fieldbus interface states can be requested via the ACExC 01.2display (Menu Diagnostic M0022). For further information, please refer to “Manual(Device integration fieldbus) AC 01.2/ACExC 01.2”.

4.2.1 Line and star topology

Table 5: Troubleshooting table

Causes and remedies→ Continue with 4YesCan actuator be controlled

via fieldbus?1

→ Continue with 2NoFO coupler supplied with voltage (24 V DC).→ Continue with 4

YesGreen LED [UL] illumina-ted?

2

→ Continue with 3No

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Corrective action

Causes and remediesPossible causes and remedies:FO coupler is defective→ Replace coupler.

Power supply (24 V DC)available?

Verify power supply(24 V DC) of the FOcoupler:

3.

Remedies:→ Check fuses within ACExC 01.2.→ Restore power supply.

Power supply (24 V DC)not available?

Possible causes:● Sender on coupler defective

● FO connection of sender not operable

YesIs yellow LED [BA] flicke-ring?

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Possible causes:● Slave not properly connected

● Slave defective

● Master defective

● FO coupler receiver or FO connection of receiver defective

● Is the required FO coupler (BARTEC order no.: 07-7311-97WP/6000 or /4000) installed at the master?

No

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Corrective action

5. Technical data

Information The following technical data includes standard and optional features. For detailedinformation on the customer-specific version, refer to the order-relevant data sheet.This data sheet can be downloaded from the Internet at http://www.auma.com inGerman and English (indication of commission number required).

5.1 FO coupler

Ex de [ib] IICExplosion protection (in accor-dance with EN 50014 to EN50020)

Coupler: PTB 97 ATEX 1068 UMounting: TÜV 99 ATEX 1404 X

EC type examination certifica-tes

FSMA FO plug/socket connectorFO connection

For line topology: 1 x IN/OUT or 2 x IN/OUTFor star topology: 1 x IN/OUT

Channels (optical)

Maximum 115.2 kbit/sData rate

Half-duplexTransmission type

Multi-mode, 62.5 (50)/125 µmFibre

8 dB at 62.5 µm4 dB at 50 µm fibre

Optical budget

62.5 µm glass fibre:2,600 m (FO cable damping max. 3.0 dB/km, without additional damping)

Network range max.

50 µm glass fibre:1,400 m (FO cable damping max. 3.0 dB/km, without additional damping)

850 nmWave length

–25 °C to +60 °COperation temperature

24 V DC/75 mA, internally supplied via power supply unit of ACExC 01.2.For line and star topology: External power supply of the ACExC 01.2 with 24 V DC/500 mApossible. Only when the ACExC 01.2 is operated on external voltage supply will the bus remainuninterrupted in case of a loss of operating voltage.

Power supply

● LED UL (green) = device ready for operation (power supply available)

● LED BA (yellow) = bus active: Data is received via the RS485 channel.

Indications (LEDs)

Modbus RTUSuitable bus systems

Bartec, to be purchased from AUMA or www.bartec.de● FO coupler for line or star topology

- 1 channel FO PP coupler(BARTEC order no.: 07-7311-97WP/6000)(AUMA order no.: K004.208)

- 2 channel FO T coupler(BARTEC order no.: 07-7311-97WP/4000)(AUMA order no.: K006.014)

Required FO modules for themaster

36 + 1 coupler at the master (at 57.4 kbit/s)Maximum number of FO actua-tors

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Technical data

6. Appendix

6.1 Calculation of achievable FO range

Lmax Maximum achievable cable length of FO cable/wire[km]

P Optical budget [dB] (connectible power).

aK Damping of the couplings [dB].

Typical values for FST = 0.4 – 0.6 dB, for FSMA = 0.6 – 1.6 dB.

AnzK Additional number of FO couplings within the FO cable between two actuators(excluding FO couplings at electrical connection of AUMA actuators; damping ofthese actuators is already included in the optical budget).

aL Specific cable damping [dB/km], refer to technical data of the FO cable.

Example 1 Standard set-up, i.e. no additional couplings:

P = 8 dB; AnzK = 0; aK = 0.6 dB; aL = 3.0 dB/km

Lmax = 2,600 m

Example 2 Two couplings within the cable:

P = 8 dB; AnzK = 2; aK = 0,6 dB; aL = 3,0 dB/km

Lmax = 2,200 m

Figure 10: Example: Two couplings within the cable

[1] 1st FSMA aK coupling = 0.6 dB

[2] 2nd FSMA aK coupling = 0.6 dB

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Appendix

6.2 Measuring methods

Figure 11: Damping measurement

6.3 Reference addresses

● Required FO module for the master:BARTEC Top Holding GmbHMax-Eyth-Straße 16D-97980 Bad Mergentheim GermanyTel.: +49 7931 597-0Fax: +49 7931 597-119www.bartec.de

● FO cables and wires:Network reliability despite multiple points of failureeks Engel GmbH & Co. KGSchützenstr. 2, 57482 Wenden-Hillmicke,Tel.: + 49-2762 - 9313 - 60,www.eks-engel.de

6.4 Literature

● Christoph P. WrobelOptische Übertragungstechnik in der PraxisGrundlagen, Komponenten, Installation, AnwendungenHüthig VerlagISBN 3-7785-2638-3

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Appendix

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Appendix

AUMA Riester GmbH & Co. KGP.O.Box 1362D 79373 MuellheimTel +49 7631 809 - 0Fax +49 7631 809 - 1250riester@auma.comwww.auma.com

Y005.974/003/en/1.13

For detailed information on AUMA products refer to the Internet: www.auma.com

1 Short description2 FO connection2.1 Basic information2.2 Terminal compartment: open2.3 FO cables: connect2.4 Terminal compartment: close

3 Network topologies3.1 Line topology3.2 Star topology

4 Corrective action4.1 LED indications4.2 Troubleshooting4.2.1 Line and star topology

5 Technical data5.1 FO coupler

6 Appendix6.1 Calculation of achievable FO range6.2 Measuring methods6.3 Reference addresses6.4 Literature