Download II. DELTA-CPU Module and Housing (Basic Unit)

CPU Module
4. Instructions on EMI
• A characteristic of interference immunity is the same
as that of the often quoted chain: It is as weak as its
weakest member.
Besides other
precautions,
shielding is
important
• That’s why besides precautions inside the device
cable connections, respectively correct shielding, are
of greatest importance.
• Shielding must be done on both ends of the
applicable cables.
• The entire shield must be drawn behind the isolation,
and then be extensively clamped under a strain relief.
Direct and
extensive
grounding is
important
• When the signal is connected to terminal screws: The
strain relief must be connected with a grounded
surface directly and extensively.
Please use
metallised male
connector
housings
• When male connectors are used: Only use metallised
connectors, e.g. SUB-D with metallised housing.
Please take care of direct connection here as well.
Separate
signal and
voltage
connections
spatially
• On principle, separate
connections spatially.
signal
and
voltage
CPU Module 9