User's Manual
Table Of Contents
- DISTRIBUTED I/O SYSTEM
- CONTENTS
- INTRODUCTION
- INSTALLATION
- THE DIOS PIU AND PICCOLO-XR UNITS
- APPENDIX A: PIU and PICCOLO-XR SPECIFICATIONS
- APPENDIX B: MODELS and ACCESSORIES
- APPENDIX C: ANTENNA
- APPENDIX D: PIU/PICCOLO–XR MOUNTING TEMPLATES
The DIOS PIU and Piccolo-XR Units
29
PIU Connectors
The PIU connectors (see Figure 18):
• RS232 (RJ45, 8 pin)
• RS485 (RJ10, 4 pin)
• Adapter port (RJ10, 4 pin)
• PGND And Power Switch (TB 3 pin)
• 24 V AC PWR IN (2 pin)
• 6, 9, 12 V DC Battery Input (2 pin)
PIU LED Operation
Three software programmable LED indicators are located on
the PIU enclosure (see Figure 18). These indicators can be used
for diagnostics purposes.
• Radio TX/RX (RED): ON – a valid fram
e is received
by the internal DPSK modem or the PIU transmits a
frame.
• RS232/RS485 RX/TX (ORANGE): ON – a valid
frame is received or transmitted through the
RS232/RS485 port (UART1).
• Adapter port TX/RX (GREEN): ON – a valid frame is
received or transmitted through the adapter port
(UART2), or the Radio is being programmed.