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136 Model 2700 Transmitter with PROFIBUS-PA
Connecting with ProLink II
C.2.1 Connecting to the service port
To temporarily connect to the service port, which is located in the non-intrinsically safe power-supply
compartment:
1. Open the cover to the intrinsically safe wiring compartment.
Opening the wiring compartment in a hazardous area can cause an explosion. The service port should
only be used for temporary connections. When the transmitter is in an explosive atmosphere, do not
use the service port to connect to the transmitter.
2. Open the transmitter’s power-supply compartment door.
3. Connect one end of the signal converter leads to the RS-485 terminals on the signal converter.
4. Connect the other end of the signal converter leads to the service-port terminals. See
Figure C-2.
Opening the power supply compartment can expose the operator to electric shock. To avoid the risk of
electric shock, do not touch the power supply wires or terminals while using the service port.
Figure C-2 Connecting to the service port
Service port
RS-485 to RS-232
signal converter
25 to 9 pin serial port
adapter (if necessary)
RS-485B
RS-485A