Data Sheet
10/72-1.18-0 EN Melody
CCR 70 Cnet/Fnet-Repeater
Features / Application Fig.: Block diagram of CCR 70 modules
• • • • • • • • • • • • • • • • • • •
Cnet repeater with 1 (2) MBd transmission rate Fnet repeater with 375 kBd or 2 MBd transmission rate Basic CCR 70 device with 4 slots for the interface modules CM 100 interface module for coaxial cable as transmission medium FM100 interface module for glass optical fibre as transmission medium Maximum four optical fibre interfaces (per transmit and receive) Redundant arrangement of repeaters Transmission using half-duplex traffic Connection to the internal Cnet via the front BNC socket Connection to the internal Fnet via the BGT backplanes Electrically decoupled, reactionless signal decoupling Line length (optical) up to maximum 2000m Point to point connection (electrical) up to maximum 500m Length of bus segments (electrical) max. 200m Close range/remote changeover of the optical fibre interfaces Optical fibre line test using the FM100 module Reception/fault display Installation into the Melody subrack Size 7 height units / 8 pitch units
The CCR 70 repeater defined as the basic device, with the associated CM100 and FM100 interface modules, has been specially developed for use in Cnet and Fnet. The repeaters prepare the data, so that additional subscribers can be connected to the relevant bus or larger distances can be bypassed, e.g. using optical fibre or coaxial cables. Repeaters equipped with the corresponding interface modules are suitable for the following applications: • • • • • •
Increasing the number of subscribers and extending the transmission paths Point to point connections (optical) up to 2000m Point to point connections (electrical) up to 500 m Y-branching (electrical) Optical star with 4 optical fibres per module Bus connection between several cabinets (electrical) up to 200m
Component variants The following table shows you the slots, in which the interface modules for typical applications are to be inserted. The arrangement is not random, but depends on the network, the medium used and the selected bus topology. An unused slot (-/) is to be covered with a dummy module (DM100). Network: Fnet
Medium:
Module slot: -----A------
-----B-----
-----C-----
-----D-----
Point to point
==>
-/-
-/-
-/-
-/-
Y-branching
==>
-/-
-/-
CM100
-/-
Cnet
Point to point
==>
CM100
-/-
-/-
-/-
Cnet
Y-branching
==>
CM100
-/-
CM100
-/-
Point to point
==>
-/-
-/-
-/-
FM100
2-way star
==>
-/-
-/-
FM100
FM100
Cnet/Fnet
3-way star
==>
-/-
FM100
FM100
FM100
Cnet/Fnet
4-way star
==>
FM100
FM100
FM100
FM100
Fnet
Cnet/Fnet Cnet/Fnet
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Coaxial cable 75 ohm
Bus topology:
Glass fibre 50/152 um
10/72-1.18-0 EN
07/2002
Network topologies Cnet and Fnet can be used to construct well-known network structures, such as bus segments with N subscribers, point to point connections, optical stars etc.. For use with Cnet(C), Cnet(O), Cnet (SC) and Fnet(01), the same repeaters are used, as the bus protocol and the interfaces are identical in each of the four cases. Series connection of repeaters should be avoided wherever possible, as it leads to additional repeater response times (higher token passing time in Cnet). If this kind of arrangement is required, however, a total of no more than 5 repeaters can be in series between the stations.
Bus segments A bus segment is defined as a section terminated with the surge impedance at the start and end, with more than two subscribers. The available transmitting power and the total of all receiver input loads determine the number of possible subscribers on the segment. With many subscribers with high data incidence, this value may not be able to be completely utilised as the maximum permissible transfer rate will be reached too early. Cnet(C): A maximum of 16 individual CMC processing units or 16 redundant processing units can communicate with one another on a Cnet(C) segment. If the above number of subscribers on a bus segment is exceeded, repeaters must be used to connect a further bus segment. Each pair of repeaters also counts as a subscriber, so that in the simplest case, fifteen CMC pairs and one CCR 70 pair, for example, are possible. A segment can be made up of CMC modules in one or more cabinets. Coaxial cables between the subracks connect the stations to one another. Repeaters are only required if the permitted number of subscribers or the maximum segment length (200m) is exceeded. Cnet(O): A Cnet(O) segment is typically comprised of 3…4 single or redundantly assigned CMCs. The number of conductive alphanumerics then require one CCO each for the transition to the Onet (ethernet). Due to the structure dependent couplers, no repeaters are normally required for the Cnet(O). If so, the same rules apply as for Cnet(C). Cnet(SC): As for the Cnet(C), it is also the case here that with more than 16 singly placed CCC couplers or 16 redundant couplers, repeaters must be used to regenerate the signals. However, this case only occurs with large systems with many sections and should, therefore, be viewed as an exception. Fnet: The Fnet coupling inside the cabinet between the CMCs and the I/O modules is via the backplane in the BGT and via flat cable (twisted pair) jointly for bus lines A and B between the BGTs. CMC can communicate within a cabinet with the maximum of 44 subscribers (I/O modules) that can be connected there. With more than 44 subscribers, a further cabinet is to be designed to hold the modules and repeaters for signal regeneration.
Point to point connection, electrical An electrical point to point connection allows the coupling of bus segments over a maximum distance of 500m, if there are no potential differences between the systems and there is no danger of surge voltages. The following are standard applications: • • •
Satellites/stations in the same building Remote I/O modules in the same building Fail-safe system in adjacent cabinet
Other than the pair of repeaters, no further subscribers may be connected on a point to point connection, otherwise the line should be viewed as a bus segment with a maximum permissible length of 200m and not as a point to point connection.
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Cnet: The internal Cnet(C) and Cnet(O) coupling between the CMCs is always via coaxial cable for lines A and B. Coaxial cable is also normally used for cross-cabinet coupling. Electrical isolation is ensured by the transformer on the subrack backplane. The maximum possible segment length - without the use of repeaters - is 200m. Point to point connection with repeaters allows a distance of 500m to be bypassed. The linking of remote satellites/stations requires two CCR 70s plus a CM100 in the Melody cabinet with bus segment 1 and the same arrangement in the cabinet with bus section 2. Fnet: An electrical Fnet point to point connection is usual for communication with remote Melody I/O modules or a fail safe system. The components are located in an adjacent cabinet or at least in the same building. Flat cables may not be used outside the system cabinet. This also applies, if the system cabinets are directly adjacent to one another. Electrical isolation using the repeater is indispensable, as without it the Fnet interface ICs (bus drivers) are endangered. The cabinet with the Fnet Master has two CCR70s. CM100 interface modules are not required as the CCR70 itself already has a coaxial connection. The linking of remote Melody I/O modules also requires two CCR70s in the associated system cabinet/wall cabinet. The connections for a safety system look somewhat different. The fail safe cabinet (19” structural technology) should be equipped with two CNR10s + a CNE310 (3 height unit Contronic E module).
Point to point connection, optical Cnet/Fnet For the connection of remote stations or entire system areas, optical fibre lines should be used for preference. They offer a line length of 2000m with high-quality electrical isolation against potential differences and surge voltages. • • •
Satellites/stations in another building/system area Remote I/O modules in another building/system area Fail safe system in another building/system area
Cnet: Point to point connection with repeaters allows a distance of 2,000 m to be bypassed. The linking of remote satellites/stations requires two CCR 70s plus a CM100 in the Melody cabinet with bus segment 1 and the same arrangement in the cabinet with bus section 2. Fnet: An optical Fnet point to point connection can be considered for communication with remote Melody I/O modules or a fail safe system under the above circumstances. The system components are then located in an adjacent building or a remote system area. The linking of the fail safe system requires two CCR70s plus an FM100 in the Melody cabinet containing the Fnet master. The remotely placed system or wall cabinet with the Melody I/O modules (slaves) is also equipped with a CCR70 plus FM100. In contrast, for a fail safe cabinet, two CNR10s + CN010 (3 height unit Contronic E module) should be planned.
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Optical star For the Cnet or Fnet, an optical star with two to four optical fibre lines can be made up of a CCR70 and two to four FM modules. An increase in the number of lines (> 4) is possible by parallel connection of further CCR70s on the same bus segment. An optical star may not be connected directly with another star, i.e. cascaded. This would lead to an unacceptable total response time. Fig.: Unacceptable interconnection
Coupling is only permissible if it is not a second star but a point to point connection AND no modules are inserted on C and D. This rule applies to all three interfaces B, C and D. Interface A is the exception as there is always a decoupling repeater function [R] between it and the other interfaces. The following figure shows the two special cases. For cascade arrangements, the points made in the introduction to Chapter 2 also apply here. Fig.: Permissible interconnection
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Technical data CCR 70 Cnet repeater function: - Transmission method - Transmission procedure - Transmission speed - Bus control
Manchester coded SDLC 1 or 2 MBd (Manchester) token passing
Fnet repeater function: - Transmission method - Transmission procedure - Transmission speed - Bus control
Manchester coded or NRZI SDLC 375 KBd (NRZI) or 2 MBd (Manchester) master/slave (Fnet)
Coaxial interfaces: - Interface standard - Surge impedance - Bus length - Connection
RS 485 75 Ohm max. 200 m (500 m for a point to point connection) BNC
Power supply: - Supply voltage - Fuse - Current consumption - Power dissipation - Permissible Uv - Surge voltages:
Uv = +20 ... +33 V G-fuse link 5 * 20 , 3.15 A slow blow T 3.15 H IV = 35 mA at Uv = 24 V PMAX = 0.84 W 35 V for 1 s, 45 V for 10 ms
Ambient temperature:
0 ... 70C
General data: - Space requirement - Weight
8 pitch units, 7 height units 375g
These details are applicable for a CCR70 without interface modules.
CM100 Coaxial interfaces: - Interface standard - Surge impedance - Bus length - Connection
RS 485 75 Ohm max. 200 m (500 m for a point to point connection) BNC
Power supply: - Supply voltage - Current consumption - Power dissipation
via CCR 70 IV = 5 mA related to Uv = 24 V PMAX = 0.12 W
Ambient temperature:
0 ... 70C
General data: - Space requirement - Weight
4 pitch units, 1.5 height units 50 g
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FM100 Optical fibre interfaces: - Optical fibres - Wavelength - Line length - Connection
G50/125 graded core fibres 850nm max. 2000m F-SMA
Power supply: - Supply voltage - Current consumption - Power dissipation
via CCR 70 IV = 15 mA related to Uv = 24 V PMAX = 0.36 W
Ambient temperature:
0 ... 70C
General data: - Space requirement - Weight
4 pitch units, 1.5 height units 50 g
DM100 Dummy module:
Appropriate EMC covering of unused slots
General data: - Space requirement - Weight
4 pitch units, 1.5 height units 40 g
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Order details Basic device including FM/CM modules and covering Order number 72240-
72240-
Description
Delivery time
0
-
0
0
0
0
0
CCR70 repeater inc. modules for the following applications
0
1
0
0
0
0
0
CM100 not required Fnet, coaxial cable 75 Ohm, point to point
0
2
0
0
0
0
0
1 x CM100 Fnet, coaxial cable 75 Ohm, Y-branching
0
3
0
0
0
0
0
1 x CM100 Cnet, coaxial cable 75 Ohm, point to point
0
4
0
0
0
0
0
2 x CM100 Cnet, coaxial cable 75 Ohm, Y-branching
0
5
0
0
0
0
0
1 x FM100 Cnet/Fnet, glass fibre 50/125 um, point to point
0
6
0
0
0
0
0
2 x FM100 Cnet/Fnet, glass fibre 50/125 um, 2-way star
0
7
0
0
0
0
0
3 x FM100 Cnet/Fnet, glass fibre 50/125 um, 3-way star
0
8
0
0
0
0
0
4 x FM100 Cnet/Fnet, glass fibre 50/125 um, 4-way star
0
_
0
0
0
0
0
Individual modules for retrofitting Order number 72241-4-
72241-4-
Description
Delivery time
9 4
5
0
2
4
8
CM100 coaxial module
9 4
5
0
2
4
9
FM100 optical fibre module
9 4
5
0
3
2
1
DM100 dummy module
9 4
5
0
_
_
_
Accessories Order number
Description
Delivery time
F-sections, closing resistors, coaxial cable, pigtails, optical fibre cables etc. should be ordered separately
ABB Automation Products Industriestraße 28 65729 Eschborn Tel. (06196) 800-0 Fax (06196) 800-11 19 Subject to technical changes
Höseler Platz 2 42567 Heiligenhaus Tel. (0 20 56) 12- 0 Fax (0 20 56) 12- 56 79
Kohlstraße 4 32425 Minden Tel. (05 71) 830- 0 Fax (05 71) 830- 11 05 Printed in the Fed. Rep. of Germany 10/72-1.18-0 EN 07/2002 ABB
