Bộ chuyển đổi tín hiệu USB sang RS-485/TTL Geokon 8020-38
The Model 8020-38 Addressable Bus Converter provides the means to interface GEOKON Addressable Sensor Strings with a variety of systems, including personal computers, programmable logic controllers and dataloggers.
The Addressable Bus Converter acts as a bridge between USB- or TTL-capable readers and GEOKON RS-485-enabled sensor strings. The Model 8020-38 is placed in-line with the system and provides bidirectional signal conversion between USB and RS-485 or between TTL and RS-485.
Communication is performed over a half-duplex RS-485 connection using the Modbus® RTU protocol. The Model 8020-38 has user-resettable baud rates between 9600 bits per second and 115.2 kilobits per second (the default factory setting)
TTL: 12 Volts DC 500 mA
USB 1.0 to USB 3.1;
5 V TTL (single-ended);
5 V TTL (single-ended, inverted)