Acquire and transmit encrypted hydrometeorological measurements
Overview
The AL205E is a low-power ALERT2 encoder/transmitter with one radio output port for data transmission (TX only). With its two serial ports, input from several devices is possible—including from a data logger. Connection to a data logger enables the acquisition and transmission of hydrometeorological measurements. Local administration is possible through the micro USB console. The GPS functionality provides the required time synchronization needed for TDMA transmissions, and the LEDs offer status and activity indications. The AL205E is firmware-upgradeable.
Note: ALERT2 is a trademark of the National Hydrologic Warning Council.
Benefits and Features
- ALERT2 flood warning network compatible
- Forward error correction (FEC)
- 250 ms TDMA slotting
- Low power
- Selectable modulation output power levels
- Works easily with Maxon and Ritron radios
- Meets published ALERT2 Working Group Standards
Images
Specifications
| Operating Temperature Range | -40° to +80°C |
| Power Connector | 2 pin, spring clip |
| Power Supply | 9 to 17 Vdc (reverse polarity protected) |
| Current Drain at 12 Vdc |
|
| TX Radio Modulation Voltage |
|
| Clock Synchronization | GPS |
| Clock Drift |
|
| RS-232 |
|
| LEDs | 5 status LEDs for Serial 2, Serial 1, GPS On, Clock Sync, Transmit, TX Radio On |
| Active GPS Antenna | SMA, female |
| TX Radio | 5 pin, spring clip (power, ground, push-to-talk, data, channel select) |
| Certifications | FCC Part 15 Class A certified |
| Dimensions | 19.05 x 10.16 x 3.18 cm (7.5 x 4 x 1.25 in.) |
| Weight | 600 g (1.3 lb) |
Compatibility
The AL205E is compatible with NHWC ALERT2 AirLink v1.1, MANT v1.1, and API v1.0. It supports ALERT2 API input, as well as ALERT2 API and ASCII output. The AL205E implements ALERT2 data concentration and ALERT2 IND interface. The encoder also implements proposed protocol extensions for Configurable Forward Error Correction. Flexible addressing support either assigns an address to the whole device or enables the customization of a specific AL205E serial port with a unique address.