Wiring Description 232 end:R and T:RS232 bus receive and transmit, and other RS232 module connection needs to cross and, that is, RX connected to TX. G is the ground of 232 terminal, connect to external negative pole. V:Positive terminal of module's power supply, connect to the positive terminal of external power supply. 485 terminal: A and B: RS485 bus DATA + (A) and DATA - (B), 485 need to A to A, B to B; G:RS485 reference ground, generally can be left unconnected.
Additional Features
- 7, the use of transient suppression TVS 600W diode, over-voltage protection performance is better: 9, the use of 10Q current protection resistor, chip design to improve the integrity of the 485 signal; 10, RS485, TTL signals, all single-sided routing, to ensure signal quality, improve signal integrity; 11, a large area of copper paving, to prevent the hot plugging phenomenon of copper.
