The Bus Coupler connects the PROFIBUS system to the electronic terminal blocks, which can be extended in modular fashion. One unit consists of the Bus Coupler, any number of up to 64 terminals and one end terminal. Up to 64 digital input/output terminals can be connected.
The Bus Coupler recognizes the connected terminals and automatically generates the affiliations of the inputs/outputs to the bytes of the process image. The first input/output signal is inserted in the first bit of one byte (LSB"Least significant bit" Sometimes abbreviated as LSB, the least significant bit is the lowest bit in a series of numbers in binary; the LSB is located at the far right of a string. For example, in the binary number: 10111001, the least significant bit is the far right "1"), beginning from the left. The Bus Coupler inserts further signals in this byte. Inputs and outputs are clearly separated. The Bus Coupler automatically begins a further byte if the number of inputs or outputs exceeds 8 bits.
The Bus Coupler supports the operation of all Bus Terminals. As far as the user is concerned, handling of the analog inputs/outputs is not different to other series. The information is available in the process image of the controller for processing in the form of a byte array.
The Bus Terminals can be controlled by the control system. Via function blocks (FBs), the programmable logic controller (PLC"Programmable Logic Controller" A Programmable Logic Controller, PLC, or Programmable Controller is a digital computer used for automation of industrial processes, such as control of machinery on factory assembly lines. Used to synchronize the flow of inputs from (physical) sensors and events with the flow of outputs to actuators and events) or the Programmable Automation Controller (PAC"Programmable Automation Controller" PAC is a compact controller that combines the features and capabilities of a PC-based control system with that of a typical programmable logic controller (PLC). A PAC thus provides not only the reliability of a PLC, but also the task flexibility and computing power of a PC. Additionally, because they function and communicate over popular network interface protocols, PACs are able to transfer data from the machines they control to other machines and components in a networked control system) handles configuration of the complete periphery during the start up phase. If required, the controller can upload the decentrally created configuration data in order to centrally manage and store this data. Therefore, new adjustments are not necessary in the event of replacement of a Bus Terminal. The controller automatically sets the required setting on power up.
| Electrical and Mechanical Specifications | AKT-PRB-000-000 |
|---|---|
| Number of I/O stations | 100 with repeater |
| Number of I/O points | approx. 6,000, depending on the master |
| Data transfer medium | shielded copper cable, 2 x 0.25 mm2 |
| Max. cable length | 1,200 m |
| Data transfer rates (system data) | 9.6/19.2/93.75 kbaud |
| Data transfer time (system data) | approx. 3 ms (10 stations for 32 bit input and output) |
| Number of Bus Terminals | 64 |
| Max. number of bytes fieldbus | 64 byte input and 64 byte output (DP and FMS mode), 128 byte input and 128 byte output (only DP mode) |
| Digital peripheral signals | 512 inputs/outputs |
| Analog peripheral signals | 64 inputs/outputs (only DP mode) |
| Configuration possibility | via the controller |
| Data transfer rates | 12 Mbaud |
| Bus interface | 1 x D-sub 9-pin socket with shielding |
| Power supply | 24 V DC (-15 %/+20 %) |
| Input current | 70 mA + (total Standard Bus current)/4, 500 mA max. |
| Starting current | 2.5 x continous current |
| Recommended fuse | ≤ 10 A |
| Supply current Standard Bus | 500 mA |
| Power contacts | 24 V DC max./10 A max. |
| Electrical isolation | 500 Vrmsrms stands for root mean square (also known as the quadratic mean) (power contact/supply voltage/fieldbus) |
| Weight | approx. 170 g |
| Operating/storage temperature | 0…+55 °C/-25…+85 °C |
| Relative humidity | 95 %, no condensation |
| Vibration/shock resistance | conforms to EN 60068-2-6/EN 60068-2-27/29 |
| EMC immunity/emission | conforms to EN 61000-6-2/EN 61000-6-4 |
| Protect. class/installation pos. | IP 20/variable |
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