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ADAM-5000 E-3
Appendix E
Figure E-2: External Terminal Block and Fan
E.3 External DI, DO, AI, AO Wiring Reference
Ø The common end of some D.I. and D.O. modules is connected with
the GND of ADAM-5000/4000 system. Therefore, the common end
of external DI and DO signal wiring should not be grounded with
those on-site machineries.
Ø Within an environment that is subject to multiple interferences, it is
advised that a higher voltage level, e.g. a voltage above 12 V
DC
,
should be used to ward off possible interferences.
Ø The signal wire for AI and AO must be of a shielded type, i.e. with
surrounding copper mesh and aluminum foil for proper shielding.
For the specification of the signal wires, please refer to User’s
Manual.
E.4 Requirements for RS-485 signal wires
Ø Use RS-485 twisted-pair as signal wire. The quality of signal
transmission can be improved in proportion with the number of
twists per foot of the wire. If the wire has more twists per foot, the
signal quality could be better.
Ø Twisted -pair wire compliant with EIA-422 or EIA-485 standards,
which contains 24AWG thin copper conductor with copper mesh
and aluminum foil for shielding.
Relay
T/B
ADAM 5000/485
FAN (Outflowing)