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Installation and Use Manual 15
Installation and Setup
ProLink II Setup Transmitter StartupUsing ProLink IIBefore You Begin
Method 2: HART/Bell 202 temporary connection to RFT9739 field-mount and RFT9712 transmitters
1. At the PC, connect the VIATOR HART Interface to the PC’s serial or USB port.
2. Open the transmitter’s wiring compartment.
3. Locate the Bell 202 hookups inside the wiring compartment and attach the VIATOR HART
Interface leads to the prongs (see Figure 2-2). The connection is polarity-insensitive; you can
attach either lead to either prong. For assistance in locating the Bell 202 hookups, see
Appendix A.
4. If necessary, add resistance in the loop by installing resistor R1 with a resistance of
250–1000 Ω
. Note that the hookups use the same circuit as the primary mA output, so the
required resistance may already be installed if the primary mA output loop is connected to a
remote device.
Figure 2-2 Attaching the VIATOR HART Interface to the prongs
VIATOR
VIATOR
R1
Prongs
Transmitter
or
USB plug