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© 2009 Active Research Limited
Connecting to a Personal Computer RS232 port
It is possible to connect the USG-1-485 to a PC’s serial
communications (RS232) port, however, the resulting PC
connection would not be bidirectional - as communication
can only work one-way (either receive only, or transmit
only, but not both).
It is therefore, highly recommend to use an Actisense
USG-1-422 model instead, using the RS232 connections
detailed in that user manual. This method will allow full bi-
directional isolated connection to a PC RS232 port.
Connecting to a 3-pin RS485 Listener or Talker (IEC 61162-2)
Figure 3 – RS485 / IEC 61162-2 port connections
The USG-1 transceiver can be connected to an IEC61162-2
Listener, and / or Talker that requires a differential drive
plus ground as shown in figure 3, The USG-1 serial port
will default automatically to listen mode when no data is
being sent (from an ‘RS485 Talker’) to the virtual serial
port representing the USG-1-485 on the PC.
RS485 Listener
and / or Talker
A/+
GND
B/-
Summary of Contents for USG-1-B-485
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