Chapter 1. Installation
1-31
DigitalFlow™ GC868 Startup Guide (1 and 2-Channel)
Figure 1-39: Analog Input Wiring Diagram
Wire the analog input terminal block in accordance with the pin number
assignments shown in Figure 1-42 on page 1-43.
If the flowmeter system includes additional transmitters, the Model GC868 can
accommodate up to three more analog input option cards. These option cards are
identical to the temperature/pressure card described above and they should be
wired in the same manner (see Figure 1-39 on the previous page).
The analog inputs on the option card(s) can be calibrated with the Model GC868’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.
1.8.6.1
Wiring a
Totalizer/Frequenc
y Outputs Option
Card
The Model GC868 can accommodate up to four totalizer/frequency outputs option
cards. Each totalizer/frequency output 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 1-42 on page 1-43.
Figure 1-40 below shows sample wiring diagrams of a totalizer output circuit and a
frequency output circuit.
+24V 1
INHI 2
INLO 3
+
–
+ IN
– OUT
+ IN
– OUT
Sensor
Sensor
Transmitter
Transmitter
Analog Input
Analog Input
24 VDC
POWER SUPPLY
With External Power Supply
With Internal Power Supply
RTN 4
Jumper
+24V 1
INHI 2
INLO 3
RTN 4
