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Product Specic Feature Requirements
ALL 0V wire (current
return)
1. Always connect ALL 0V current return wires
2. Do not use the screen for 0V current return
3. It is highly recommended to avoid connecting
0V across internal isolation barriers. If a
single 24V supply is used for the main power
and IO power then these two isolated 0V will
have to be connected but this should only be
done if the 24V supply is free from switching
noise
4. Do not join together 0V from high power and
/ or noisy sources with the 0V from signal
ports (incl. CAN bus DC input)
5. Do not use any controller 0V connection as a
current return for peripheral devices
ALL All 24V DC ports 1. It is highly recommended to use surge lters
on all DC supply and 0V return. If more
than one device is connected to the same
PSU then this is a requirement, (see Surge
Protection on page 6 and Product Technical
Manual)
ALL Cable routing 1. Maintain 150mm separation of parallel Class
I and Class II cable (IEC 61000-5-2:1997) (see
manual)
2. Unless otherwise specied, all cables must
be <30m in length
ALL Proximity to source
of disturbance
1. Place controllers and expansion modules
as far from mains cables, mains lters,
contactors, circuit breakers, drives,
transducers or other high power sources of
EM disturbance as physically possible within
the enclosure design
ALL Enclosure / Safety
Cabinet design
1. Trio’s products should always be installed
within a locked cabinet with access limited
to authorised personnel only
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