KEP MMI-7 Series Installation Instruction page 5

The MMI Series has been designed to operate satisfactorily in electromagnetic noise (immunity) and
without emitting high levels of electrical noise into the environment (emission). The units are designed to
meet European Community standards when installed per the wiring instructions in this manual.
Compatibility Standards
The MMI has been designed to meet electromagnetic compatibility for industrial environments.
Standard
CISPR (EN 55011) Group 1,
Class A
EN50081-2
EN50082-2
General Installation Guide Lines for EU Installations.
• Be aware that wiring leaving the cabinet where the unit is installed may be exposed to interference
sources.
• The installation practices in the individual product installation manuals of other components in the
system must also be followed.
• Locally applicable grounding safety regulations and machinery directives should be followed for
providing a protective ground to earth. The EMC ground must be a low impedance, low inductance path
to the machine chassis ground.
• Power supply to the unit must be through an IEC-rated isolation transformer.
• The Power supply to the controller must be controlled to ensure that it does not exceed over voltage
category II per EN60204-1 (IEC 240).
• Other requirements of the Machinery Directive involving displays, languages, instructions, Emergency
Stop functions, machine operation, protective guards and interlocks are the responsibility of the machine
manufacturer.
• Use a ferrite core on the power wiring to reduce radiated emissions from the DC power lines. It is
recommended to use a 140Ohm@100MHz ferrite core with the DC power lines looped through the core
once. Position the ferrite core less than 1" away from the DC power connection points on the back of the
MMI.
General Safety Guide Lines for EU Installations.
Only qualified personnel should be allowed to specify, apply, install, operate, maintain or perform any
other function related to MMI products. Qualified persons are defined as follows:
System application and design engineers who are familiar with the safety concepts of automation
equipment.
Installation, start-up, and service personnel who are trained to install and maintain automation
equipment.
Operating personnel trained to operate automation equipment and trained on the specific safety
issues and requirements of the particular equipment.
Make sure that the voltage range for the equipment is correct before switching on the equipment.
Emergency-tripping devices in accordance with EN60204/IEC204 must be effective in all operating
modes of the automation equipment. Resetting the emergency off device must not result in any
uncontrolled or undefined restart of the equipment.
Automation equipment and its operating elements must be installed so that unintentional operation is
prevented.
Make sure that operating sequences, interrupted by a voltage dip or power supply failure, resume proper
operation when the power supply is restored. If necessary, the equipment must be forced into the
"emergency off" state.
Install the power supply and signal cables so that inductive and capacitive interference voltages do not
affect automation functions.
Description
Radiated Emissions levels
Generic emission standard, industrial environment (Also US
FCC Class A)
Generic immunity standard, industrial environment
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