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Connection to mA output terminalsFigure C-3:
A
C
B
D
E
A. PC
B. RS‐232 to Bell 202 converter
C. External power supply
D. 250–600
Ω
resistance
E. Transmitter with end‐cap removed
Note
This figure shows a serial port connection. USB connections are also supported.
The signal converter must be connected across a resistance of 250–600 Ω. The mA
output requires an external power supply with a minimum of 250 Ω and 17.5 V. See
the following figure to help determine the appropriate combination of voltage and
resistance. Note that many PLCs have a built-in 250-Ω resistor. If the PLC is powering
the circuit, be sure to take this into consideration.
Using ProLink III with the transmitter
216 Micro Motion
®
Fork Viscosity Meters (FVM)