| with positive and negative 15KV ESD protection. |
| the chip has a slew rate of the driver, to minimize EMI, and reduce signal reflections from improper termination caused the cable so that no error signal transmission rate of up to 500Kbps. |
| with the receiver input impedance 1/4 unit load, supporting multi-machine communication, allowing access up to 128 devices on a bus. |
| industrial chip temperature can reach -40 °C to + 85 °C. |
| the modules can be hot-swappable, hot-swap does not occur other 485 chip signal appears dead bolt phenomenon. |
| Power chip tantalum electrolytic capacitors, and high frequency using a dual power supply filter capacitor. |
| using a dual transient suppression diodes, overvoltage better performance. |
| using 10Ω current protection resistors, chip design improves signal integrity 485. |
| 10, with terminals and welding wire holes to facilitate debugging and final finalize wiring, welding wire can improve signal reliability. |
| 11. RS485. TTL signal all-sided alignment and ensure signal quality, improve signal integrity. |
| 12. a large area of ??copper to prevent signal interference. |
| 13. with a 2.54 pitch tunnel plate welded holes to facilitate your secondary development. |
| 14. has now quite common M3 screw holes for easy installation and reliable. |
| 15. with a 120Ω termination resistor shorted to enable the termination resistor R16. |
| 16. with power and RXD, TXD signal lights, send and receive status panoramic view. |
| 17. angled pin leads, easy to test. |
| 18. support 3.3V and 5V signal control, compatibility stronger. |
|
This module is a joint service shop hardware engineers, product development based on a wealth of practical experience in design, production, and each module are strictly tested to ensure support 500Kbps baud and below flawlessly (Shenma current mainstream 2400bps, 4800bps, 9600bps, 19200bps, 38400bps, 57600bps, 115200bps, 128000bps, 256000bps etc perfect autonomy recognize and automatically select the appropriate communication speed mode), and must not use an external controller chip.
|
