Kendrion Kuhnke Automation GmbH
Bus Coupler
27
17 May 2021
5.2.1 Bus Coupler
The Kuhnke FIO bus coupler converts the physical transfer technology (twisted pair) to
LVDS (E-bus) and generates the system voltages required by the LVDS modules. The
standard 100 Base Tx lines used for office network communications connect to the one
side, the Ventura FIO I/O modules for the process signals connect to the other. This is how
the EtherCAT protocol is retained right through to the last single I/O module. At the end of
the modular device, the connection between the forward and return lines is automatically
closed, the effect being that another 100 Base Tx line can be plugged in to connect the next
EtherCAT unit to the second bus coupler port.
Information
Best noise emission results are obtained by connecting the shield of the EtherCAT cable to
operative earth.
Shield Terminal, for example (see section 6.2)
Connectors
Module power supply
L+
24 VDC
L-
0 V
EtherCAT
Female IN RJ45
input (from previous EtherCAT station)
Female OUT RJ45
output (to next EtherCAT station)
Status LEDs
LED "EtherCAT Run"
The LED labelled "EtherCAT Run" indicates the state of the EtherCAT ASIC.
Initialising, no data exchange
Pre-operational, no data exchange
Safe operation, inputs readable
Operational, unrestricted data exchange
Bus coupler front view
