RD55 Data Logger


RD 55 is a data logger - transmitter designed to satisfy the needs of data processing, logging and transmitting environmental data from any setting.

Conceived mainly for the acquisition of serial digital inputs , has the option of installing an interface board for data acquisition from : frequency, pulses and analog sensors.


Serial inputs can be: RS232, RS485, SDI 12 ; the built in protocols satisfy most manufacturers. Supports NTCIP, DGT and AEMET in Spain and third party Web Services.
The kind of hardware and embedded operating system let the RD 55 incorporate any other proprietary protocol as well as any processing algorithm to satisfy the customer needs.
The collected data are stored in an internal memory of 8 GB corresponding to intervals from 1 second to hours.
Built in 3G/GPRS modem for transmitting from most remote locations without infrastructure
RD 55 has Ethernet interface to be connected to the user IP network.
A serial RS232 output is supplied for any other way of transmission ( radio, satellite, etc. )
Built in GPS for time synchronization.
A 4.3” touch screen colour display is supplied for parameter visualization and set up and maintenance tasks.
A Web server is also included to carry out these tasks from a remote terminal.


RD55 Technical Data

Optional Inputs


Voltage Mode
- 4 single-ended
- 2 differential
Resistor mode
- 2 inputs (e.g. PT100)
Current Mode
- 4 inputs (e.g. 4-20 mA)


3 Inputs:

       - 2 frequency/counter

       - 1 8-bits parallel / synchronous serial

Range, Resolution and Accuracy





0¸2.4 V

50 mV

500 mV

0¸70 mV

10 mV

100 mV

Digital frequency

10 KHz

1 Hz

1 Hz



1 pulse

1 pulse

Measurement Processing

Processing time levels

Capture, Sampling and Integration


1 second~12 hours

Data presentation

E.g. -30ºC~70ºC, 4-20mA, etc.

Real-Time Clock


dd/mm/yyyy - hh:mm:ss

Resolution & Drift

1 second - 10 ppm


By internal GPS or SNTP (IP)

Serial Communication
Ethernet 1 port
RS232 2 ports
RS485                               2 ports
SDI-12                               1 port
Display & Keypad
Display 4.3” touch screen display
Digital outputs
Outputs 4
Power Supply Features
Power supply 8~32VDC
Max power consumption 1.5W  
Operating temperature range -40ºC ~60ºC
Processor & OS
Processor ARM Cortex A5
Operating System Windows embedded
Case Painted Aluminium
Length 170 mm
Width 130 mm
Height 60 mm
Weight: 560 gr