Beckhoff BK7300 User Manual download pdf (Page 14)

Basic information

10 BK7300

Electrical data

The MODBUS – the fieldbus-specific electrical data is listed in this section.

The following table gives an overview of all the data:

Technical data BK7300

Supply voltage

24 V DC

Input current

70mA +

(total K-bus current)/4

500 mA max.

Power-on surge

2.5 x steady operating current

K bus supply

current up to

1750 mA max.

Configuration

facility

via KS2000 or the controller

Number of bus

terminals

Digital peripheral

signals

256 inputs/outputs

Analogue peripheral

signals

128 inputs/outputs

Baud rate

From 150 baud to 38400 baud

Protocol

RTU and ASCII

Bus connection

D-Sub RS 485

9-pin

Voltage of the

power contact

24 V DC / AC max.

Power contacts

current drawn

10 A max.

Electric strength

500 V (power contact / supply voltage / fieldbus)

none

Typical weight

170 g

Operating

temperature

0°C ... +55°C

Storage

temperature

-20°C ... +85°C

Relative humidity

95% without dew formation

Vibration/shock

stability

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

EMC immunity/

transmission

according to EN 50082 (ESD, burst) / EN 50081

Installation location

Any

Protection class

IP20

Current consumption on the

K-Bus

For operation of the K-bus electronics, the bus terminals require energy

from the K-bus that is supplied by the bus coupler. Refer to the catalogue

or the corresponding data sheets of the bus terminals for details of the K-

bus current consumption. In doing so, pay attention to the maximum output

current of the bus coupler that is available for powering the bus terminals.

Using a special power supply terminal (KL9400), power can be fed back

into the K-bus at any chosen point. If you wish to use a power supply

terminal, please contact Beckhoff’s technical support.

The peripheral data in the process image

When the bus coupler is first switched on it determines the configuration of

the attached input/output terminals and automatically assigns the physical

slots of the input/output channels to the addresses in the process image.

The bus coupler sets up an internal list of assignments in which each of the

input and output channels has a specific position in the process image. A

1 2 ... 9 10 11 12 13 14 15 16 17 18 19 ... 39 40

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Beckhoff BK7300 User Manual Page 14

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