HN-291D
The Serial Adapter Box
The HopNet radio remotes interface with the user’s hardware through a serial adapter
box. The interface adapter supplies power and signal to the remote unit. The
interface to the remote unit is a RS-232 male DB-9 serial interface. To have all
functions of the HopNet radio available, including configuration and hardware flow
control, the eight signal lines must be connected.
CONFIG Mode
When the RUN/CONFIG switch is in the CONFIG position, the HopNet radio data
connector is set up as a DCE device. This allows communication with a PC using the
straight-through, serial cable provided with the HopNet radio. The switch must be in
the CONFIG position to run the HN Wizard.
RUN Mode
When the RUN/CONFIG switch is in the RUN position, the HopNet radio data
connector is set up as a DTE device. The switch must be in the RUN position to
operate with a PLC configured as a DCE device.
3 Wire Operation
If configuration and hardware flow control is not necessary, the HopNet radio can be
used in 3-wire mode. In this mode, only Ground, Receive Data and Transmit data are
connected. The connector pinout is provided below.
©
2000- 2004 Cirronet
™
Inc
8
M-0910-0002 Rev B
