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RTMS G4 Installation
The RS-485 Port
Over short distances (30 ft) the wiring diagram shown below is compatible with an RS-232
port. There is no standard pin configuration for RS-485 on a DB9 connector. The wiring
diagram shown will connect directly to a RS-232 configured DB9 without the need for an RS-
232/RS-485 converter.
A disconnect point is recommended to allow the RTMS to be detached from the transmission
line without disruption of communications with other sensors on the line. See Connecting
RTMS to External Modems for details.
2-8
Figure 2.6. RS-485 Wiring Diagram
© 2009 ISS Canada.
Chapter 2
G4 User Manual
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