Murata Electronics Corporation 32 6/2/2021
7.2. Serial Connector Pinouts
The HN-510 is wired as a DTE device and as such can be connected to DTE devices such as
PCs with a straight-through cable. When connecting a HN-510 to a DCE device, a “null
modem” cable is required. To effect a null modem cable, cross-wire TXD and RXD and
connect ground. The HN-510 can operate with just these three wires connected. However,
as the WIT2420 does not support software flow control, there will be no flow control in this
mode. If the DCE device fails to respond, connect DCD from the HN-510 to the DTR and
RTS inputs to activate the DCE device whenever the WIT2420 asserts carrier.
When connecting to the WIT2420M/S, make sure that all of the inputs (TXD, CFG, RTS and
SLEEP) are terminated for proper operation.
7.3. Approved Antennas
The WIT2420M/S is designed to ensure that no antenna other than the one fitted shall be
used with the device. The end user must permanently affix the antenna by using an adhesive
on the coupling such as Loctite, or ensure the antenna has a unique coupling. The table
below lists the antennas which can be purchased directly from MurataCorporation. Contact
DWC Technical Support with any questions.
Mobile Mark Corner
Reflector
7.4. Technical Support
For technical support call MurataCorporation at (678) 684-2009 between the hours of
8:30AM and 5:30PM Eastern Time.
Note: The WIT2420M is the
standard part number and has
the serial connector pins
pointing down allowing
connection to a mother board
without using a cable. WIT2420S
has the serial connector pins
pointing up.
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