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SEL Mirrored Bit Radio, FGR-115MB 
900 MHz Spread Spectrum Wireless Radios
Designed and optimized for use with Schweitzer Engineering Laboratories Mirrored Bits™ communications protocol, the FGR-115MB provides robust, reliable, error-free communications for electric power protective relay applications.
This product is ideal for point to point line of sight communications of up to 25 miles with clear line of sight, and provides significant cost and time savings over the installation of a fiber optic link.
The FGR-115MB's unique, fast frequency hopping technology provides maximum availability. This ensures reliable Mirrored Bits communications, even in the presence of noise, interference, and high-level electrical fields found in electrical substations. Features - Mirrored bits protocol (hops 500 times per second!)
- High Speed - 115.2 Kbps continuous throughput
- Error Free Communications - 32 bit CRC with automatic retransmission
- Secure - Proprietary spread spectrum technology prevents detection and unauthorized access
- Versatile - A single radio can operate simultaneously as a Slave and as a Repeater
- High Noise Immunity - Superior Performance in noise congested environments
- Industrial Grade Specifications - 100% tested for full performance from -40°C - +75°C
- Rugged enclosure
- Operating voltages - 6 to 30 VDC
Specifications | Radio link: | | Frequency Range | 902-928 MHz | | Method | Frequency hopping spread spectrum | | Hopping Patterns | 15 user selectable | | Hopping Channels | 50 to 112, user selectable | | Hopping bands | 7, user selectable | | Range, Line-of-sight | 25 miles | | Occupied Bandwidth | 230 KHz | | Modulation | GFSK, 120 ~ 170 Kbps | | RF Connector | Type N female | | Transmitter: | | Output Power | <100 mw to 1 watt (+30 dBm) | | Receiver: | | Sensitivity | -110 dBm for 10-6 BER | | Data Transmission: | | Error Detection | 32 bit CRC, retransmit on error | | Data Encryption | Substitution, dynamic key | | Data Latency | 1 ms typical | | Link Throughput** | 115 Kbps max | | ** Uncompressed , measured assuming 75% frequency availability | | Data Interface: | | Protocol | RS232/RS422/RS485,
115.2 KBaud, DCE | | Connector | DB9-female | | Power Requirements: | | Voltage | 6 to 30 Vdc
| | Transmit Current | 500 mA peak at 12 Vdc | | Receive Current | 86 mA at 12 Vdc | | Idle Current | 21 mA at 12 Vdc | | Environment and mechanical: | | Operating tempertature | -40 °C - +75 °C | | Enclosure | Extruded Aluminum | | Dimensions | 6.5 L x 2.93 W x 2.23 H ["]
165 L x 74.4 W x 56.6 H [mm] | | Weight | 441 g / 15.5 oz |
Ordering Info
| Model | Supply Voltage |
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| FGR-115MB | 6 to 30 Vdc |
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