Chapter 3 Getting Started; Connecting The Detector To The Computer - Emerson Rosemount 935 Reference Manual

Reference Manual
00809-0200-4035
3 Getting started
3.1

Connecting the detector to the computer

Before you can perform any configuration or diagnostic operation on a detector, you must
connect the computer to the detector using the harness cable provided.
3.1.1 Connect the computer to a detector
Procedure
1. Connect one end of the USB cable to the computer USB port.
2. Connect the other end of the USB cable to the USB serial (RS-485) adapter.
3. Connect the serial port of the adapter to the harness cable.
3.1.2 Connect the detector to the harness cable
Procedure
1. Connect one side of the cable to detector terminal 5 for RS-485 (+).
2. Connect the other side of the cable to detector terminal 6 for RS-485 (-)
3.1.3 Connect a socket D-Type on the other side of the cable
Procedure
1. Connect RS-485 (+) to pin 2.
2. Connect RS-485 (-) to pin 1.
3. Connect RTN to pin 5.
3.1.4 Perform USB adapter setup
Procedure
1. Unscrew the cover of the USB adapter.
2. There are two options for setting up the jumpers:
Rosemount 935
Figure 3-1: USB adapter setup option 1
Getting started
April 2022
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