Murata Electronics North America 910M Manual Do Utilizador

 
 

 

GND 1 

5 

TXD 2  3 
RXD 3 

2 

CFG 4 

- 

RTS 5  7 
SLEEP 6 

4 

DCD 7 

1 

CTS 8  8 

 
The HN-591 is wired as a DCE device and as such can be connected to DTE devices such 
as PCs with a straight-through cable.  When connecting a HN-591 to a DTE device, a 
“null modem” cable is required.  To effect a null modem cable, cross-wire TXD and 
RXD and connect ground.  The HN-591 can operate with just these three wires 
connected.  However, as the WIT910 does not support software flow control, there will 
be no flow control in this mode.  If the DTE device fails to respond, connect DCD from 
the HN-591 to the DTR and RTS inputs to activate the DCE device whenever the 
WIT910 asserts carrier.   
 
When connecting to the WIT910, make sure that all of the inputs (TXD, CFG, RTS and 
SLEEP) are terminated for proper operation. 
 
 

The WIT910 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 Cirronet.  Contact Cirronet 
Technical Support with any questions. 
 

9dB Yagi Directional 

9dB 

YAGI099 

Male Rev TNC 

6dB Yagi Directional 

6dB 

YAGI096 

Male Rev TNC 

5dB Omnidirectional 

5dB 

OMNI095 

Male Rev TNC 

2dB Omnidirectional 

2dB 

OMNI092 

Male Rev TNC 

 

 

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