CAUTION!
If the transmitter is in a hazardous area, do not remove the transmitter end-cap while the
transmitter is powered up. Removing the end cap while the transmitter is powered up could
cause an explosion. To connect to the transmitter in a hazardous environment, use a
connection method that does not require removing the transmitter end-cap.
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 v3.2 or later installed and licensed on your PC
• An available serial port or USB port
• The installation kit appropriate to your connection type (RS-485 or Bell 202, serial
port or USB)
• 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.
Note
HART connections are not polarity-sensitive. It does not matter which lead you attach to
which terminal.
c. Add resistance as necessary to achieve at least one volt across the connection
points.
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 199
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