Remote Data Frontend

The right solution for a total control

RDF3-ETH (Remote Data Frontend with embedded Ethernet port) is the data collection equipment installed inside transmission and reception sites where you have a DSL connection available. It’s the heart and the hands of the Garda remote control system. Uncompromised reliability, versatility and modular structure are RDF3-ETH main characteristics. RDF3-ETH is the ideal solution whenever you have a DSL connection and a lot of mixed analog and digital data and controls to manage. RDF3-ETH can be expanded to manage an incredible amount of data, both physical and software:

- Up to 256 analog inputs (8, 10, 12 or 16 bit resolution), up to 248 digital inputs (on off), up to 256 relays (digital output) and up to 32 x 10bit resolution analog outputs. They are configurable, both locally and remotely, and are programmable to generate alarms or run simple routines, called macros. Furthermore, the I/O state can be read, both on site and remotely, at any time.
- Direct RS485 SW connection with third party equipment
- Analog inputs have 6 programmable thresholds: 2 alarms, 2 pre-alarms and 2 record thresholds for historical recording.
Contact closure inputs can be set as open or closed. The optically isolated RS485 interface, together with I/O expanders and ANT universal protocol bridge, can connect practically any kind of third party equipment, making RDF3-ETH the ideal partner of broadcasters, where many kind of old and new equipments are used without de facto any interface standard. Alarms are sent immediately to the control center software, the NetPOD, which will activate warning procedures via SMS, phone calls, and e-mail according to timelines, responsibility, area,  etc. Should the control center not be momentary in reach of the remote system, RDF3-ETH main memory will store a queue of 500 alarms to grant the RDF3-ETH with a long off-line autonomy.

The connection to the control center will use the DSL connection, while an optional backup media can be set in active standby, and automatically switched to in case of failure of the main communication media.

The right solution for a total control

  • TCP/IP Ethernet 10/100
  • RS232 half/full duplex up to 57kbaud
  • GSM modem (M2M)
  • GPRS modem
  • CDMA modem
  • PSTN modem
  • Wireless UHF with “store and forward” mode
  • Wireless VHF with “store and forward” mode
  • Dedicated audio channel, mono and bidirectional (radio links)
  • Modem baseband (4 wires)

Base unit characteristics

  • 1 TCP/IP Ethernet 10/100
  • 1 RS232 for PC connection
  • 1 RS485 optically isolated port for equipment communication
  • 8 analog inputs w/ 8 or 10 bit resolution, input voltages from 0 to 5 VDC
  • 8 optically isolated contact inputs 5mA (max 24V) w/ selectable polarity
  • 8 single state output relays, max current 1A @ 24 VCC.
  • 2 internal inputs for auto diagnostic purposes


Additional 1RU expansion units connected via RS485 optoisolated ports allow to add up to:

  • Nr. 256 analog inputs (8 or 10 bit resolution, others available upon equest)
  • Nr. 248 contact inputs
  • Nr. 256 relay outputs
  • Nr. 32 analog outputs (10 bit resolution)

I/O Connections

Contact Output: 16-pin female Weidmuller 3.5 connector
Contact Input: 16-pin female Weidmuller 3.5 connector
Analog Input: 25-pin female connector
AUX Power Supply: Auxiliary Power Supply 2-pin female Weidmuller 3.5 connector

There are available 1U rack baskets with other kind of connection

Power supply

Power: 110 or 230VAC ± 10% 30VA
UPS: Internal #2 x 6V 3.0Ah gel battery, charged by the RDF.

(In the Wireless UHF/VHF configuration, a 40 Ah external battery is used)


RDF3-ETH Remote Data Frontend RS232/485 + Ethernet
RDF3-G-ETH Remote Data Frontend with a GSM/GPRS + ethernet link
RDF3-U-ETH Remote Data Frontend with a 403/470 MHz + Ethernet link
RDF3-V-ETH Remote Data Frontend with a 136/174 MHz + Ethernet link