Wiring A Totalizer/Frequency Outputs Option Card - GE DigitalFlow GS868 Startup Manual

March 2008
Wiring a 0/4-20 mA
Analog Inputs Option Card
(cont.)
Wiring a Totalizer/
Frequency Outputs Option
Card
1-16
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.
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.
Model GS868
Isolation Voltage: 500V
Max. Load Power: 10W In
NO
C
C = Isolated Return
Model GS868
+5V
Ω
200
NO
C
C = Isolated Return
Figure 1-8: Totalizer/Frequency Outputs Wiring
Totalizer Output
Max. Current: 4A
Max. Voltage: 150V
Frequency Output
Frequency Counter
IN
Common
Pulse Counter
Volts +
(Int. Pwr. Sup.)
Load
Volts –
(Common)
Installation