Kendrion Kuhnke Automation GmbH
System description
15
11/25/2016
Unlock button
Status LEDs
Shield-to-housing
mount connector
Module lock and E-
bus
Carrier rail mount and
operative earth
Ventilation slots
Signal state indicators
(LEDs)
Grip
Label clip
Slot for spring-
assisted combi plug
3 System Description
3.1 General conditions of use
This section describes the general characteristics of Kuhnke FIO modules which are important for the
installation, wiring and troubleshooting.
You can find an overview of the system properties of Kuhnke FIO in section 7.1.1 on page 153.
The specific characteristics of the individual modules will be presented in chapter 4.
3.2 Mechanical Design
For the basic layout of the Kuhnke FIO-modules see Figure 2: Module layout.
The bus coupler and the I/O modules differ in their connectors and indicators, however.
The housing mount consists of an aluminum profile with an integral snap-on device used to snap the module
to a 35mm DIN rail. The housing trough including the optical fibers for the status indicators, the side face and
the front is made of plastic and contains the module. The optical fibers for the signal state indicators (LEDs)
are located next to the spring-assisted combi plug. They slightly protrude from the housing and allow a clear
diagnosis at a glance.
3.2.1 Earth
Connect the Ventura FIO modules to earth by attaching the metal housing to operative earth.
Since the operative earth connector dissipates HF currents, it is of utmost importance for the module's noise
immunity.
HF interference is dissipated from the electronics board to the metal housing. The metal housing therefore
needs to be suitably connected to an operative earth connector.
You will normally have to ensure that
•
the connection between module housing and DIN rail conducts well,
•
the connection between DIN rail and switching cabinet conducts well,
•
the switching cabinet is safely connected to earth.
In special cases you may attach the earth wire straight to the module.
.
Figure 2: Module layout
