RE400 Transparent Radio Modem

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RE400 Transparent Radio Modem

RE400 Transparent Radio ModemRE400 is the "easiest" radio modem in RACOM product range. It gets very close to being a true Plug-and-play device, as close as ever possible in private radio networks. The minimum settings necessary are all accessible from one simple web browser screen.

RE400 works as a standard IP network bridge, i.e. it is fully transparent. Every unit can serve as the central master or as a remote terminal and it can also simultaneously operate as a repeater.

The modern digital solution of the radio part (Software Defined Radio) of the RE400 radio modem allows for a wide frequency range a SW configurable channel spacing. 

  • 400 MHz
  • 6.25, 12.5, 25 kHz
  • 11 kbps / 25 kHz
  • 2W
  • 1x ETH, 1x RS232
  • PoE or 10 – 30 V DC
  • Transparent bridge
  • Plug and play


  • Polling type networks
  • Water
  • Oil & Gas
  • Electricity
  • Smart grid POS &ATM
  • Lottery
  • Weather

Fully transparent

  • Standard IP network bridge functionality is implemented in the RE400 radio modem, i.e. the ETH interfaces of all the radiomodems in a network are interconnected according to bridge principles.
  • When a COM interface is used, every frame received over a COM is simply broadcast to COM interfaces of all units in the network.

 Easy to configure and maintain

  • Web interface
  • All configuration parameters within one page
  • Basic IP knowledge is sufficient
  • CLI via SSH


  • Licensed radio bands
  • FEC, interleaving, proprietary data compression
  • CRC32 data integrity control on Radio channel
  • Password-protected access, https web interface


  • 400 MHz band
  • Line ofsight is not required
  • Carrier output power adjustable 0,5 or 2W
  • Exceptional data sensitivity
  • High resistance to multipath propagation and interference
  • Any unit can work simultaneously as a repeater


  • Every single unit tested in a climatic chamber as well as in real traffic
  • Military or industrial components
  • Industrial rugged die-cast aluminum case 


  • Local and remote diagnostics
  • DIN rail mounting
  • L-bracket, flat-bracket, direct mounting
  • CE approval

RE400 Transparent Radio Modem FrontRE400 Transparent Radio Modem Rear

RE400 - Transparent Radio Modem

RE400 Transparent Radio Modem Settings


Technical parameters

Radio parameters
Frequency bands 373.25–484 MHz
Models: 373-402; 400-420; 417-447; 435-466; 462-484 MHz
Channel spacing 6.25 / 12.5 / 25 kHz
Frequency stability +/- 1.0 ppm
Modulation 2CPFSK
RF Data rate 10.4 kbps / 25.0 kHz
5.2 kbps / 12.5 kHz
2.6 kbps / 6.25 kHz
FEC (Forward Error Correction) No
Carrier Output power 0.5 or 2 W
Duty cycle 50%
Rx to Tx Time < 1.5 ms
Sensitivity better than -107 dBm
Primary power 10.8 - 30 V DC or PoE (38 - 57 V DC)
Rx 430 mA; 145 mA/48 V
Tx 0.5 W: 700 mA/13.8V; 230 mA/48V 
2.0 W: 950 mA/13.8V; 310 mA/48V
Sleep mode No
Ethernet 10/100 Base-T Auto MDI/MDIX RJ45
DB9F 300-115200 bps
Antenna 50 Ohms SMA female
LED panel Power, Tx, Rx, ETH, 232, Status
Operating temperature -25°C to +55°C
Humidity 5 to 95% non-condensing
Storage temperature -35°C to +85°C
Casing Hard aluminium
Dimensions 31 H x 96 W x 137 D mm
Weight 0.3kg Mounting DIN rail, flat-bracket
Operating modes Bridge
Data integrity control CRC32
Encryption No
Diagnostic and Management
Radio link testing Ping + RSS
Radio CE
ETSI EN 300 113-1 V 1.6.2 (2009-11)
EMC (electromagnetic compatibility) ETSI EN 301 489-1 V 1.6.1
Electrical Safety EN 60950-1 ed. 2:2006

RE400 - Transparent Radio Modem