I/O-Modules
Fieldbus Terminals
Lightbus - Coupler


Product Description


The BK2000 and BK2010 bus couplers connect the TRS-Lightbus system to the electronic terminal blocks, which can be expanded in modular fashion. One unit consists of one bus coupler, any number of up to 64 terminals and one end terminal. The BK2010 economy variant permits particularly economical creation of peripheral interfacing connections. Up to 64 digital input/output terminals can be connected.

The bus coupler recognises 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), beginning from the left. The bus coupler inserts further signals in this byte. Inputs and output are clearly separated. The bus coupler automatically begins a further byte if the number of inputs or outputs exceeds 8 bits.

The TRS-Lightbus System is a rapid and safe serial field bus system. The TRS-Lightbus has a ring structure, and up to 254 stations can be operated in a ring. Easy-to-operate standard fiber-optic technology is used for data transmission, which represents excellent value. Thanks to an optimised, efficient telegram structure, the Lightbus achieves a very high user data transmission rate. For the exchange of 32 bit user information 25 m s transmission time is required.

Order number

Description

BK2000

TRS Lightbus coupler for up to 64 bus terminals

BK2010

TRS Lightbus coupler for up to 64 digital bus terminals

BK2500

TRS Lightbus coupler with RS485 port instead of fiber optic interface

KL9010

End terminal

KS2000

Connecting cable, configuration software on CD for Windows 95/NT
 

Complex signal processing for analog I/Os, position measurement

The BK2000 bus coupler supports the operation of all bus terminals. As far as the user is concerned, handling of the analog inputs/outputs is no different to other series. The information is available in the process image of the controller for processing in the form of an byte-array.

The analog and multifunctional bus terminals can be adapted to each specific application using the KS2000 configuration set. Depending on the type, the analog bus terminals' registers contain temperature ranges, gain values and linearisation characteristics. Using the KS2000 software, the required parameters can be set on a PC. The bus terminal stores settings permanently and in a fail safe manner.

Optionally, the bus terminals can also be controlled by the control system. Via function blocks (FBs), the Programmable Logic Controller (PLC) or the Industrial Personal Computer (IPC) 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.

Thanks to the high-speed access method employed by the TRS Lightbus, it is possible to access specific peripheral data and to read or write the required data only. Data is exchanged with the required priorities without producing any overhead.

 

System data

TRS-Lightbus (BK2000, BK2010)

Number of I/O modules

254

Number of I/O points

16192

Data transfer medium

Fiber optic conductor: APF (plastic)- fiber (1000 µm) or PCS- fiber (200 µm)

Length between modules

45 m APF- fiber, 600 m PCS- fiber

Data transfer rate

2.5 Mbaud

Data transfer time

0.26 ms in the case of 10 modules with 32-bit inputs and outputs each
 

Technical data

BK2000 BK2010

Number of bus terminals

64

Digital peripheral signals

256 inputs/outputs 256 inputs/outputs

Analog peripheral signals

128 inputs/outputs ---

Configuration possibility

by KS2000 or the controller

Maximum number of bytes

512 bytes I and 512 bytes O 32 bytes (I and O)

Bus connection

2 x standard fiber optic connector Z1000 (plastic- fiber), Z1010 (PCS fiber)

Power supply

24 V DC (20...29 V DC)

Input current

70 mA + (total K-Bus current)/4
500 mA max. 200 mA max.

Starting current

2.5 x continuous current

Recommended fuse

£ 10 A

K-Bus power supply up to

1750 mA 500 mA

Power contact voltage

24 V DC max.

Power contact current load

10 A max.

Dielectric strength

500 Vrms (Power contact / bus coupler supply voltage)

Weight approx.

150 g 130 g

Operating temperature

0°C ... +55°C

Storage temperature

-25°C ... +85°C

Relative humidity

95%, no condensation

Vibrations/shock resistance

conforms to IEC 68-2-6 / IEC 68-2-27

EMC resistance Burst / ESD

conforms to EN 50082 (ESD, Burst) / EN 50081

Installation position

any

Type of protection

IP20

 

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Copyright © 2000 TRS Fieldbus Systems, Inc. All rights reserved.
Revised: June 28, 2000 .