RTU-LP is a Low Power RTU/dataloggers family for remote control and data collection of unattended remote sites. The RTU-LP-ST version integrates a Quad Band GSM/GPRS 850/900/1800/1800 MHz modem, 8 I/O channels (4 galvanically isolated digital inputs with 4 totalizers, 2 analog inputs in voltage/current, 2 relay outputs 30 Vdc) and 2 MB Flash memory for data collection. The module can supply power to external sensors (max 100 mA) with automatic pre-ignition and can operate independently for up to 3 years with the standard Li-Ion 13,000 mA/h @10.8 V batteries supplied.
The operating modes include data transmission on an event or on request (via SMS or FTP Server), temporary switch-on for receiving and/or sending messages and temporary switch-on on an event. When purchasing a product (RTU-LP-ST, RTU-LP-ST1 or RTU-LP-ST2), the A-GSM antenna accessory is also supplied (as shown in the product image).
The IP65 external housing is also available for harsh environment applications.

Connections - DB9-Female connector: interface V.24 RS232
SMA Connector: for external antennas
I/O's connectors: M6 removable terminals
Modem - GSM/GPRS Quad band
Features - I/O's acquisition and data logging
Transmission
Data connection / SMS
Dedicated Functions
Automatic daily data sent
Communication ports - 1 UART GSM port
1 V24-RS232 serial port, half-duplex, local link, settable speed: 1.200.. 115.200 baud rate
Supported protocols - ModBUS RTU, FTP client, SMS
Digital Input - N° 4 channels galvanically insulated 1.500 Vac, minimum input pulse duration >1s for detection and counting purposes
Analog Input - N° 2 channels with protections against surges
Range: ±2 V, ±20 V, ±50 V, ±20 mA

Parameter Name	Parameter Value
Type	GPRS GSM Modbus RTU
Port	RS-232
Other characteristics	battery-operated modem