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Graphic FX-50DU-TK(S)-C Units
4.
General Wiring
The wiring of the Data Access Units has been designed to be safe and secure by using
terminals for the connection of the power supply and D-Shell connectors for all
communication cabling.
4.1
Wiring Cautions
•
Do not lay I/O cables next to power cables or allow them to share the same trunking
duct.
•
Where I/O signals are used over an extended distance consideration must be made
for voltage drop and noise interference.
4.2
Termination at screw terminals
Power cables connected to the power
terminals of the units should be fitted with
insulated crimp terminals, see diagram
opposite.
Terminals screws should be tightened to
between 5 and 8 kg.cm (4.3 and 6.9 inlbs).
Screw terminals must be secure enough to
prevent a loose connection from causing a
malfunction.
4.3
Power Supply wiring
The power supply for these units can be
connected in one of two ways. First by connecting to the service supply of the FX MPU
and secondly from and independent source. Both methods are shown opposite.
4.4
Power Supply Wiring Cautions
•
The wires used for the power supply wiring should have a cross sectional area of at least
0.75mm
•
The wire used for the earth connection should have a cross sectional area of 1.25mm
(0.002in
•
If using the service supply of an MPU or extension unit take care not to exceed the
maximum current allowed for the unit (see appropriate manual).
•
The FX-50DU-TK(S)-C (and all graphic DU units) must be supplied from a controlled
(SELV) voltage. In all cases, the voltage supply lines from the voltage source to the
DU units require an in-line 2 amp fuse .
2
2
(0.001in
) to ensure that there is no voltage drop.
2
) and be of class 3 (<100Ω).
Figure: 4.1
Crimp terminals
< 6.2 mm
(0.24 inches)
Wiring
4
M3
(0.12 inches)
2
4 – 2
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