User`s guide

HopNet RS-232 Serial ModBus Radio

Remote Pin-Out, RS-232

Pin Number Signal Type Description

1 DCD Output Data Carrier Detect. For remotes, DCD indicates

that the remote has successfully acquired the

hopping pattern.

2 RXD

(CONFIG)

Output Output for Received Serial data.

2 TXD

(RUN)

Input Input Serial Data to be transmitted

3 TXD

(CONFIG)

Input Input Serial Data to be transmitted

3 RXD

(RUN)

Output Output for Received Serial data.

4 DTR Input Data Terminal Ready. Sleep/ wakes radio

transceiver.

5 GND - Signal and Chassis Ground

6 DSR Output Data Set Ready. Response to DTR.

7 RTS Input Request to Send. Gates the flow of receive data

from the radio to the user on or off. In normal

operation signal should be asserted.

8 CTS Output Clear to Send. Used to control transmit flow from

the user to the user to the radio. The WIT 2410

radio module supports hardware flow control

only and does not support software flow control

(e.g. Xon-Xoff).

9 Not Used - Not Used

NOTE: When the HopNet radios are used as three wire serial devices, DTR and RTS do not

have to be used.