CAUTION!
If you connect directly to the mA terminals, the transmitter's mA output may be affected. If you
are using the mA output for process control, set devices for manual control before connecting
directly to the mA terminals.
Prerequisites
• ProLink III v2.4 or later installed and licensed on your PC
• The installation kit appropriate to your connection type (RS-485 or Bell 202, serial
port or USB)
• An available serial port or USB port
• Adapters as required (for example, 9-pin to 25-pin)
Procedure
1. Attach the signal converter to the serial port or USB port on your PC.
2. To connect directly to the transmitter terminals:
a. Remove the transmitter end-cap to access the wiring compartment.
b. Connect the leads from the signal converter to terminals 1 and 2.
Tip
HART connections are not polarity-sensitive. It does not matter which lead you attach to
which terminal.
c. Add resistance as necessary.
Important
HART/Bell 202 connections require a voltage drop of 1 VDC. To achieve this, add
resistance of 250–600 Ω to the connection.
Using ProLink III with the transmitter
Configuration and Use Manual 187
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