Compatibility with Power Supplies:
3.3V: Perfectly compatible
5.0V: Perfectly compatible
Compatibility with Signal Levels:
3.3V Signals: Perfectly compatible
5.0V Signals: Perfectly compatible
Chip and Design Quality:
Chip: Original imported chip
Design: Industrial-grade with strong anti-interference capability
Lightning Protection: Enhanced 485 lightning protection design
Environmental Tolerance:
Operating Temperature Range: -40℃ to +85℃
Transmission Distance: Up to 1 kilometer (tested with 850m of 2*1.5 cable, optimal within 800 meters)
Physical Design:
Board Process: Half-hole process
Board Thickness: 0.8mm
Usage: Suitable as a composite board or for terminal welding
Indicators:
RXD and TXD Signal Lights: To monitor transmission and reception status
Lightning Protection and Anti-Interference:
For Outdoor Use: Connect the "Earth" terminal to the ground for improved lightning protection and anti-interference
For Indoor Use: No need to connect to the ground
Connectivity and Integration:
Pin Spacing: Standard 2.54mm for ease of secondary development
Matching Resistance: 120Ω, can be enabled by shorting R0, especially recommended for long distances
Multi-Device Communication: Supports connection to a bus with up to 128 devices
Hot Swap Capability:
Hot Plugging: Module supports hot swapping without the signal jamming issue common in other 485 chips
Signal Integrity:
Copper Layering: Large area copper layering to prevent signal interference
Communication Mode:
Half-Duplex Communication: Allows bidirectional communication but not simultaneously; must alternate directions
Supported Baud Rates: