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RFU-400/RFU-433
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| 429 MHz RS-232/RS-485 Wireless Modem |
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The RFU-400 is an RS-232/RS-485 to 429 MHz radio modem that can be used to convert data from an RS-232/RS-485 device to an RF message that can then be transmitted in transparent mode via the 429 MHz ISM frequency band. The RFU-400 provides a maximum line of sight (LOS) transmission distance of 1000 meters (1 km) at an RF Baud Rate of 9600 bps. In order to overcome the interference that may be encountered in harsh environments, the RFU-400 allows the RF transmission Baud Rate to be configured to a minimum of 650 bps, enhancing the capability of the modem to resist noise and other interference. Additionally, the RF channels and Group IDs are adjustable, which is helpful when attempting to avoid interference encountered when two RFU-400 networks are adjacent. The 16 RF channels and 8 Group IDs can be configured in order to distinguish and control the different RFU-400 networks. The majority of these configuration parameters can be adjusted using a combination of the Rotary and DIP switches, thereby providing a simple method of maintaining the system if the RFU-400 modem needs to be replaced.
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Description
Applications
Features
- 429/433 MHz Radio Frequency
- 16 RF Channels
- 4 RF Baud Rates
- Includes a PA switch that can be used to enhance the RF power
- Wireless line of sight (LOS) transmission range of up to 1000 meters at an RF Baud Rate of 9600 bps
- Transparent transmission mode
- Provides Baud Rates from 1200 to 115200 bps for both the RS-232 and RS-485 interfaces
- ESD Protection: Contact +/-4 kV
- Isolation: 3000 VDC for DC-to-DC, 2500 Vrms using a photocoupler
- DIN-Rail Mountable
- Operating Temperatures, -25 °C ~ +75 °C
Hardware Specifications
| Models | RFU-400 | RFU-433 |
| RF Interface | ||
| Radio Frequency | 429.1750 ~ 429.9250 MHz 433.1000 ~ 434.6000 MHz |
433.1000 ~ 434.6000 MHz |
| Baud Rate | 115200 bps ~ 650 bps | 57600 bps ~ 650 bps |
| Transmission Power | Max 19 dBm | Default 10 dBm, Max 19 dBm |
| Antenna | 0 dBi Omni directional | |
| Transmission Distance (LoS) | 1000 m (at 9600 bps RF Rate and 19 dBm Tx Power) | 500 m (at 9600 bps RF Rate and 10 dBm Tx Power) |
| Group ID | 0 ~ 7 | |
| Protocols | Transparent transmit | |
| Temporary Buffer Size | 512 Bytes | |
| Configuration | Rotary and DIP switch | |
| Repeater Mode | Support 1 hop | |
| COM Port Interface | ||
| RS-232 | TxD, RxD and GND | |
| RS-485 | D+, D- ; 3000 VDC for DC-to-DC | |
| Baud Rate (bps) | 1200 ~ 115200 | |
| Data Format | N81, E81, O81 | |
| LED Indicators | ||
| RF_Tx | Green | |
| RF_Rx | Yellow | |
| PWR | Red | |
| Isolation | ||
| Intra-module Isolation | 2500 Vrms for photocoupler (RS-485/RS-232 side) | |
| EMS Protection | ||
| ESD | +/- 4 kV Contact | |
| EFT | +/- 1 kV | |
| Surge | +/- 1 kV | |
| Power | ||
| Input Voltage Range | +10 VDC ~ +30 VDC | |
| Power Consumption | 1 W (Max.) | |
| Mechanical | ||
| Flammability | Fire Retardant Materials | |
| Dimensions (W x L x H) | 108 mm x 84 mm x 33 mm ( not include antenna ) | |
| Antenna Dimensions (L x Ø) | 108 mm x 10 mm | |
| Installation | DIN-Rail | |
| Environment | ||
| Operating Temperature | -25 °C ~ +75 °C | |
| Storage Temperature | -30 °C ~ +80 °C | |
| Relative Humidity | 10 ~ 90% RH, Non-condensing | |
Ordering Informations
| RFU-400 CR | RS-232/RS-485 to 429 MHz Radio Modem (RoHS) |
| RFU-433 CR | RS-232/RS-485 to 433 MHz Radio Modem (RoHS) |
