NEVOD - Wireless ISM-band telemetry modem::
PDF Datasheet, 375K 
Features::
- Frequency range 433,92+/-0,2% - License free ISM band (in some countries)
- Fixed-channel version and synthesized multiple-channel version
- Built-in repeater capability for extended distributed telemetry networks
- Baud rate 1200 bits per second (in the air)
- Interfaces RS-232 and RS-485 to communicate with data terminal equipment, data rates 1200-38400 bps, 9600 bps default, user-selectable
- 3 antenna types, including directed, omni directional standard, and omni directional vandal-proof
- Easy configurable by PC terminal via RS-232 link
- Supports networks with complicated topologies
- Built-in beacon feature
- Scalable radio networks
- DIN-rail mountable
- Industrial temperature range
- Cost efficient
Description::
Geolink's Nevod is a user - friendly intelligent integrated wireless telemetry modem that provides advanced features without complicated system setup and is designed for DIN-rail mounting. It's a perfect choice for today's demanding automation and control applications. Workingin the license free ISM band, Nevod offers the most popular features required for telemetry and SCADA systems and allows connecting to virtually any remote site equipment.
Nevod provides virtually real-time transparent data transfer. Data being transmitted is packetized internally by the transmitting modem, and reconstructed by receivingmodem, thus allowing fully transparent transmission. Packetscan travel rather complicated routes, passing a numberof intermediate Nevod modems, allowing complexradio network structures. Addressing and routing setup iseasily programmable via the PC terminal or notebookconnected to RS-232 interface.
Data-activated transmission feature allows to configure modem to start the transmission after one or several of the data-dependentconditions arise, such as required number of bytes are in transmit buffer, or required character encountered in data, or required number of milliseconds passed after the last character was placed to transmit buffer.
Digital error correction and CRC-test allow error-free data transmission, invalid data never comes to or from remote sites.
Nevod employs narrow-band transmission, allowing achievingbeyond competitor connection ranges with relatively low output power.
Nevod's flexibility and cost efficiency makes it a perfect choice for most popular applications.
Geolink offers customized versions of Nevod telemetry modem based on customer's specifications, and complete turn-key SCADA telemetry systems based on Nevod technology.
Applications::
- General wireless data acquisition and telemetry systems with central site, and multiple remote sites
- Water management and monitoring systems - leak and burst detection via pressure and flow monitoring, water reservoir and well monitoring, water quality monitoring
- Automated remote meter reading (AMR) applications
- Oil industry - remote control over oil wells
- Agriculture - control and monitoring over the irrigation systems
- Environment monitoring
- Factory automation
- Security systems - alarms transmission from remote sites
- Vehicle identification applications
- Merchant applications - logistics
Recommended antennas::
- ASH-433: standard omni directional antenna 433 MHz
- AN2-433: directed 2-element antenna
- AN5-433: directed 5-element antenna
- AG-433: omni directional vandal-proof antenna
Typical network configurations::
Basic radio network configutations include "star", "chain" and "tree" (see pictures below).
For advanced and large-scale applications, special custom versions of Nevod are available, allowing very complex micro-cell town-wide, city-wide and region-wide telemetry networks.
Specifications::
| Modem | |
| Frequency Range | 433,92 +/- 0,2% MHz |
| Number of channels Fixed frequency version Synthesized version |
1 up to 100 |
| Channel Bandwidth | 12.5 kHz |
| Data rate | 1200 bps |
| Modulation | FSK |
| Output power | 10 / 100 mWatts |
| Point-to-point range | Up to 10 km, depending on landscape |
| Antenna impedance | 50 Ohm |
| Serial port | |
| Interface | RS-232, with optional RTS/CTS, RS-485, jumper-selectable |
| Data Rate | 1200-38400 bps, 9600 bps default |
| Transmit buffer size | 2.5 kbytes |
| Receive buffer size | 2.5 kbytes |
| Protocol | Transparent, 8 data bits |
| Data Format | Binary, ASCII for setup |
| General | |
| Temperature range | -30..+70œC |
| Size | 118 x 70 x 50 mm |
| Operating Voltage | 10..25 VDC |
| Current Drain Transmit @ 12 VDC Receive @ 12 VDC |
150 mA 80 mA |
| Mounting | DIN-rail, 35 x 7.5 mm |
| Weight | <0.2 kg |