VRD-485 forecourt RFID reader

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VRD-485 RFID reader with RS-485 interface is intended for reading RFID contactless identifiers (cards, tags, others) and sending it over RS-485 interface.

VRD-485 reader provides reading of the identifier from distance from 10 to 90 mm (depending on the conditions). Reader allows to configure buzzer and 2 color LEDs for indication (green and red).

Price: 100 USD  

Technical characteristics #

PARAMETER VALUE
Type of contactless identifiers read EM-Marine (optionally Mifare + EM-Marine)
Power supply voltage 8…14 V DC
Average consumed current 40 mA
Peak consumed current 80 mA
Communication interface RS-485
Communication protocol Modbus
Maximal possible length of communication cable 1200 m
Dimensions 95 x 68 x 20 mm
Weight 0.1 kg
Operation temperature range -20…+85 deg. C

Example of reader installation near fuel dispenser #

 
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Control over reader #

Data transmission is performed through the RS-485 interface in asynchronous mode at a baud rates from 2400 to 115200 bit/s. Port setting are: 1 start bit, 8 data bits, parity can be configured, 1 stop bit. Communication exchange is organized in packets according to the ‘Master-Slave’ principle. Command packets are transmitted from the control device. Reply packets are sent from the reader to the control device.

The reader control protocol is Modbus, but it is also possible to operate the reader in a simplified mode, in which it transmits the code of the read RFID identifier without following the Modbus protocol immediately upon reading the card. This is done to simplify the work of programmers when a complex solution to a simple problem is not required.

Order information #

VRD-E card reader for internal installation with power supply from USB-port (EM-Marine contactless identifiers) VRD-485 reader for internal installation (EM-Marine contactless identifiers)
Order code: VRD485-INT-001
 
VRD-E card reader for external installation in waterproof casing (EM-Marine contactless identifiers) VRD-485 reader for external installation in waterproof casing (EM-Marine contactless identifiers)
Order code: VRD485-EXT-001
 
VRD-E card readerfor internal installation with power supply from USB-port (EM-Marine + Mifare contactless identifiers) VRD-485 reader for internal installation (EM-Marine + Mifare contactless identifiers)
Order code: VRD485-INT-002
 
VRD-E card reader for external installation in waterproof casing (EM-Marine + Mifare contactless identifiers) VRD-485 reader for external installation in waterproof casing (EM-Marine + Mifare contactless identifiers)
Order code: VRD485-EXT-002

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