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Robust Secure Reliable Industrial Radio Telemetry I/O PLC SCADA 458MHz 868MHz

455U-D Wireless Serial Data Modem

ELPRO wireless serial modems allow RS232 and/or RS485 serial host devices to communicate transparently. Messages are routed between devices as broadcast (simultaneous transmission of same message) or controlled mode (i.e., specific unit addressing).

455U-D has three available models in terms of functionality:

  • Bell 202 or V23 functionality (455U-B).

  • 405U-D end of life compatibility mode (455U-C).

  • Full functionality RS232/485 modem, addressed/broadcast modes/ Optimal Path Routing for Modbus RTU, DF1 and DNP-3 (455U-D).



Data logger communications, Agriculture sprayer control, Water/ waste water systems, SCADA networks



  • Licensed/license-free radio channels, suitable for most countries

  • (150, 220, 360-512MHz, 10mW – 5W RF power option availability).

  • Wireless data rates up to 19.2Kbps.

  • Diagnostics/Configuration via RS232 port.

  • Separate RS232 and RS485 ports.

  • Remote configuration via wireless channel.

  • 128 bit AES security encryption.

  • Configurable, redundancy, repeater networking.


Spotcom Catalog Numbers: 

ELR24    EL-455U-D-H-60-N           Serial Modem: Modbus RTU, DF1, DNP-3

ELR22    EL-455U-D-H-460-N         Serial Modem: Modbus RTU, DF1, DNP-3

ELR23    EL-455U-D-H-460-W         Serial Modem: Modbus RTU, DF1, DNP-3

Other Variants are available.

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