Campbell Scientific RF401-series and RF430-series Spread Spectrum Data Radios/Modems - Manual (Page 96)

Appendix I. Phone to RF401 Series
FIGURE I-4. Enter 250 for the Maximum Packet Size.
4. HARDWARE
After configuring LoggerNet and the RF401s you are ready to set up
hardware. The A100 null-modem connectors connect via SC12 cables to
the COM220 and the base RF401 CS I/O port. Connect the site phone
line to COM220. Connect power to the PS100. Connect antenna to
RF401. When you turn on the PS100 supply, the RF401 receives 12V
power and you will see the LEDs light in their power-up sequence.
Remote RF401s normally connect to datalogger CS I/O ports via SC12
cables. Powering up the datalogger will start the RF401 operating. Install
an antenna (or antenna cable and yagi or collinear) and you are ready to
collect data.
I-6