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BK4000 | Interbus Bus Coupler

BK4000 | Interbus Bus Coupler

BK4000 | Interbus Bus Coupler

Power LEDs
K-bus
Bus Coupler
supply
Input for
power contacts
Power contacts
Fieldbus signal input
Fieldbus signal output
Configuration interface
BK4000 | Interbus Bus Coupler

BK4000 | Interbus Bus Coupler

The BK4000 Bus Coupler connects the Interbus bus system to the electronic terminal blocks, which can be extended in modular fashion. One unit consists of one Bus Coupler, any number of up to 64 terminals and one end terminal.

The number of analog channels is limited by the Interbus protocol to a maximum of 32 input and 32 output channels. The transmission rate is 500 kbaud. Slave devices can be spaced up to 400 m from each other as the fieldbus interface acts as repeater. The overall length of an Interbus ring is limited to 13 km.

The identification code and the length code are determined by the Bus Coupler automatically after starting, depending upon the connected Bus Terminal, and are read out by the master. It is not necessary to parameterize the slave.

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 word (LSB), beginning from the left. The Bus Coupler inserts further signals in this word. Inputs and outputs are clearly separated.

Interbus has been established as an open fieldbus system since 1987. Interbus has a ring structure, and up to 256 stations can be operated in a ring. Data transmission takes place at 500 kbaud. Due to the efficient data transmission, sensor and actuator data can be transferred over great distances.

The Interbus coupler works with the protocol chip SUPI3 and supports the extended diagnostics of the Interbus master. Byte-by-byte addressing in the master is supported as from generation G4.

Product status:

regular delivery (not recommended for new projects) | recommended alternative: BK4020

Product information

Technical dataBK4000
Number of Bus Terminals64
Max. number of bytes fieldbus64 byte input and 64 byte output
Digital peripheral signals512 inputs/outputs
Analog peripheral signals32 inputs/outputs
Configuration possibilityvia KS2000
Data transfer rates500 kbaud
Bus interface2 x D-sub plug, 9-pin, plug and socket with screening and vibration lock
Data transfer mediumLiYCY 3 x 2 x 0.22 mm²
Power supply24 V DC (-15%/+20%)
Input current70 mA + (total K-bus current)/4, 500 mA max.
Starting current2.5 x continuous current
Recommended fuse≤ 10 A
Current supply K-bus1750 mA
Power contactsmax. 24 V DC/max. 10 A
Electrical isolation500 V (power contact/supply voltage/fieldbus)
Data transfer timeapprox. 1 ms in the case of 10 modules for 32 bit input and output each
Weightapprox. 170 g
Operating/storage temperature0…+55°C/-25…+85°C
Relative humidity95%, no condensation
Vibration/shock resistanceconforms to EN 60068-2-6/EN 60068-2-27
EMC immunity/emissionconforms to EN 61000-6-2/EN 61000-6-4
Protect. rating/installation pos.IP20/variable
Approvals/markingsCE, UL, ATEX, IECEx
Ex markingATEX: II 3 G Ex ec IIC T4 Gc
IECEx: Ex ec IIC T4 Gc
Housing dataBKxxxx, BCxxxx
Design formcompact terminal housing with signal LEDs
Materialpolycarbonate
Dimensions (W x H x D)51 mm x 100 mm x 69 mm
Installationon 35 mm DIN rail, conforming to EN 60715 with lock
Side by side mounting by means ofdouble slot and key connection
Markinglabeling of the BZxxx series
Wiringsolid conductor (s), flexible conductor (st) and ferrule (f): spring actuation by screwdriver
Connection cross-sections*: 0.08…2.5 mm²,
st*: 0.08…2.5 mm²,
f*: 0.14…1.5 mm²
Stripping length8…9 mm
Current load power contactsImax: 10 A

*s: solid wire; st: stranded wire; f: with ferrule

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