User's Manual

27
THE DIOS PIU AND PICCOLO-XR
UNITS
PIU Overview
The PIU unit (see Figure 18) is comprised of the following:
• Internal radio interfaces and a radio modem
• A logic board
• Communication ports
24V AC
Pwr IN
PGND/
DC Switch
RS485 Adaptor
Port
RS232
LEDs
Figure 18
PIU Unit General View