GE DigitalFlow GS868, Руководство для стартапов

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March 2008
1-16 Installation
Wiring a 0/4-20 mA
Analog Inputs Option Card
(cont.)
Wire the analog input terminal block in accordance with the pin
number assignments shown in Figure 1-10 on page 1-20. The
standard Model GS868 has at least one analog inputs option card,
which is used to supply the live pressure reading required for accurate
mass flow calculations. These option cards are identical to the
temperature/pressure card described above and they should be wired
in the same manner (see Figure 1-6 on page 1-14).
Note:
The analog inputs option card can be calibrated with the
Model GS868’s built-in analog outputs. However, be certain
that the analog outputs have been calibrated first. See
Chapter 1,
Calibration , in the Service Manual for the
appropriate procedures.
Wiring a Totalizer/
Frequency Outputs Option
Card
The Model GS868 can accommodate up to four totalizer/frequency
outputs option cards. Each totalizer/frequency outputs option card
provides four outputs (designated as A, B, C, and D) that can be used
as either totalizer or frequency outputs.
Each totalizer/frequency output requires two wires. Wire this terminal
block in accordance with the pin number assignments shown in
Figure 1-10 on page 1-20. Figure 1-8 below shows sample wiring
diagrams of a totalizer output circuit and a frequency output circuit.
Figure 1-8: Totalizer/Frequency Outputs Wiring
NO
C
IN
Common
Volts –
(Common)
Volts +
(Int. Pwr. Sup.)
NO
C
+5V
200
Ω
Model GS868
Model GS868
Pulse Counter
Frequency Counter
Totalizer Output
Frequency Output
Load
Max. Current: 4A
Max. Voltage: 150V
Isolation Voltage: 500V
Max. Load Power: 10W In
C = Isolated Return
C = Isolated Return