Wireless interface converter RFC

PURPOSE

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Various wired interfaces are often applied for communication exchange between electronic devices at petrol station: RS-232, RS-485, RS-422, current loop, others. These interfaces have many benefits, but all of them have a common disadvantage – they are wired, so require putting of cabling for connection. As a rule wires are put in underground pipes, which requires excavation (removing the top layer of asphalt or other cover, digging of trenches, laying of cables, etc.).

Wireless communication is an alternative to wired connection, it simplifies the whole process and eliminates a necessity of placing cabling – electronic devices are able to communicate, but communication is done over-the-air instead of wired cabling. RFC converter serves for establishing of wireless communication between the devices and have advantages as quick of mounting, flexibility of settings, high noise immunity and others.

Wireless interface converter RFC for petrol stations is appointed for establishing of wireless communication between devices having interfaces RS-232 and RS-485. RFC converter does not bring any changes to exchanged data between devices, thus RFC converter is a complete analogue to wired cabling connection with the only exception of 35 ms delay at start of data transmission. Data is encrypted during transmission using keys (changing at each data packet transfer), which set the final user can program in the RFC converters at configuration.

RFC interface converter board:

RFC interface converter in mounting box:

EXAMPLE OF APPLICATION ON PETROL STATION

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Application of RFC converter allows to minimize wires placing on petrol station and fasten installation:

TECHNICAL CHARACTERISTICS

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Specification:

Nominal power supply voltage	12 V DC
Power supply voltage range	9 … 18 V DC
Wired interfaces	RS-232/RS-485
Temperature range	from -20°C to +60°C
Weight	45 g
Overall dimensions	85 x 58 x 25 mm

Wireless communication parameters:

Transmission frequency	433 MHz
Modulation type	GFSK
Output power	not more than 10 mW
Baud rate	10000 bits/sec
Delay at transmission	35 ms
Encryption at transmission	RTEA using user-configurable encryption table

Wired communication parameters:

Communication protocol	any
Baud rate	1200 … 115200
Data format	- 5 … 8 data bits - 1 stop bit - odd/even/none parity control
Data length	up to 270 bytes
Sign of data end	delay of more than 3.5 bytes

CONNECTION SCHEME

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ORDER INFORMATION

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		RFC interface converter PCB board with terminal blocks Order code: RFC-PCB-001
		RFC interface converter board in mounting box Order code: RFC-BOX-001
		RFC interface converter board in mounting box together with PTS controller over fuel dispensers and ATG systems Order code: RFC-PTS-001