21
RX connected to TX, TX to RX, and GND to GND. The communication
speed is fixed at 9600bps, with 8 data bits, 1 stop bit, and no parity bit.
Fig. 6.1 Wiring Method for the Instrument's RS232 Interface
Signal
Abbreviation
Corresponding Pin
Transmit
TXD
2
Receive
RXT
3
Ground
GND
5
Table 6.1 Corresponding Pin Connection Table
4.2.2 RS485 Interface (Optional)
The RS485 standard defines the electrical characteristics of drivers
and receivers in balanced digital multipoint systems, as defined by the
Telecommunications Industry Association and the Electronic Industries
Alliance. RS-485 offers both two-wire and four-wire configurations, with
this product opting for the two-wire configuration.
The wiring method for the instrument's RS485 interface is as shown
in the diagram below, with communication cables directly connected