Connecting The Field Wiring; Wiring Guidelines; User Power Supply Requirements; Custom Input Ranges - Automation Direct DL405 User Manual

Connecting the Field Wiring

Wiring Your company may have guidelines for wiring and cable installation. If so, you
Guidelines should check those before you begin the installation. Here are some general things
to consider.
User Power Supply The F4-04ADS requires a separate power supply. The DL430/440/450 CPU's,
Requirements D4-RS Remote I/O Controller, and D4-EX Expansion Units have built-in 24 VDC
power supplies that provide up to 400mA of current. If you only have a few analog
modules, you can use this power source instead of a separate supply. If you have
already used the available current from this source, or if you would rather use a
separate supply, choose one that meets the following requirements: 24 VDC
$10%, Class 2, 120mA current.
Custom Input Occasionally you may have the need to connect a transmitter with an unusual
signal range. By changing the wiring slightly and adding an external resistor to
Ranges
convert the current to voltage, you can easily adapt this module to meet the
specifications for a transmitter that does not adhere to one of the standard input
ranges. The following diagram shows how this works.
NOTE: Your choice of resistor can affect the accuracy of the module. A resistor that
has $0.1% tolerance and a $50ppm / _C temperature coefficient is
recommended.
F4-04ADS 4-Channel Isolated Analog Input
S
Use the shortest wiring route whenever possible.
S
Use shielded wiring and ground the shield at the transmitter source. Do
not ground the shield at both the module and the source.
S
Don't run the signal wiring next to large motors, high current switches,
or transformers. This may cause noise problems.
S
Route the wiring through an approved cable housing to minimize the
risk of accidental damage. Check local and national codes to choose
the correct method for your application.
NOTE: Do not Jumper V & R with this procedure
+
50mA
–
V
max
R =
I
max
R = value of external resistor
V = high limit of selected voltage range (5V or 10V)
max
I = maximum current supplied by the transmitter
max
Example: current transmitter capable of 50mA, 0 – 10V range selected.
10V
R = 200 ohms
R =
50mA
V+
C–
R
R
250 ohms
4–7
+
to Analog circuitry
–