IBA ibaNet750-BM-D Distributed I/O System

Introduction

ibaNet750-BM-D is a device designed to extend the range of iba I/O functionalities using

the I/O modules of the series 750 produced by WAGO and terminals for the K-bus by

Beckhoff. The device acts as a gateway between the serial K-bus and the deterministic

fiber optic ibaNet protocol.

The WAGO I/O system is the ideal supplement for the range of the peripheral devices.

Digital and analog WAGO/Beckhoff I/O terminals as well as incremental encoders, SSI

inputs, resistance thermometers, thermocouples and measuring bridges can be inte

grated into the system.

Up to 255 WAGO I/O terminals can be connected to ibaNet750-BM-D and a data volume

of up to 2048 Bytes can be transferred over the K-bus.

The signals are internally converted and are available via the fiber optic interface. For

the connection to a data acquisition system, such as ibaPDA, an ibaFOB-D card is used

with a bidirectional fiber optic cable connection.

The device supports different ibaNet protocols:

32Mbit Flex

Using 32Mbit Flex, configuration as well as process data is transmitted via a bidirectional

fiber optics connection. ibaPDA automatically detects the modules used and the signals

can be easily selected and configured by mouse click.

With 32Mbit Flex, the sampling rate can be flexibly set up to 40 kHz. The maximum data

volume to be transmitted depends on the adjusted sampling rate. The following rule ap

plies: the higher the sampling rate, the lower the data volume. The ibaPDA application

automatically determines the maximum sampling rate, which depends on the desired

data volume and the number of devices in the ring.

With the ibaNet protocol 32Mbit Flex, it is possible to connect up to 15 devices to a ring

topology. The signal limitation applies for the entire ring. Thereby, the distance between

the devices can be up to 2 km. Other 32Mbit Flex-enabled iba devices can be integrated

into the ring as well.

32Mbit

The 32Mbit protocol is especially used with ibaLogic-V4 version 4.2.5.464 or later. With

the 32Mbit protocol it is possible to connect an ibaNet750-BM-D system to ibaLogic with

a data transmission rate of 32 Mbit/s. The cycle time is 500 µs and up to 256 (REAL) /

512 (INT) analog and digital signals are transmitted. A bidirectional fiber optic connection

is necessary in order to integrate output terminals.

3Mbit

Using the 3Mbit protocol, the device is compatible to the previous ibaNet750-BM version.

Up to 8 devices may be connected in a line topology and used as pure input or output

devices. If input and output signals should be processed at the same time, it is recom

mended to use a ring topology. Moreover, the devices may operate peer-to-peer without

a PC involved. The cycle time is 1 ms in all applications.

Characteristics in 3Mbit mode:

 Works as input and output station at the same time

 32+32 analog inputs and outputs plus 32+32 binary inputs and outputs per station

or

 Up to 512+32 binary inputs plus 512+32 binary outputs

or

 Eight complex terminals (i.e. SSI,  incremental encoder  etc.),

 Fiber optic compatible with ibaPADU-8 and ibaPADU-8-O, that means up to 8

ibaNet750-BM-D I/O-devices on 1 bus (ring or star topology)

 Integrated power supply for the modules (internal load up to 1.5 A)

 For operation with ibaPDA there are restrictions regarding the time behaviour of the

terminals (no guaranteed simultaneous plant snapshot of all signals within 1ms cy

cles).

 Operation without PC. Using this device mode, it is possible to replace conventional

copper wire bundles with ibaNet750-BM-D devices (up to 8x 136 digital signals in

each direction on 2 fiber optics).

The behavior of the device at the iba fiber optics bus is identical to one or four ibaPADU

8. ibaPADU-8AI-U/-I or ibaPADU-O devices. That means, that every device can send

and receive 8 (or 32) analog channels (16 bit each) and 8 (or 32) binary channels (8 bit),

in total 17+17 (68 + 68) Byte net data cyclically every millisecond. The devices can be

cascaded like ibaPADU-8 (ibaPADU-8-O) devices, with up to 8 devices per cascade. The

device converts the incoming data stream from the fiber optic link simultaneously and

exactly to the millisecond for all channels, regenerates the optical signal and sends it to