1.Description:
It is a TTL mutual conversion RS422 module.This module is suitable for 3.3V TTL and RS422 signal interconversion,with overvoltage and overcurrent protection circuit to protect RS422 level signal in real time,to ensure the normal operation of SP3490 chip.

2.Parameter:
1).Product Name:TTL Mutual Conversion RS422 Module
2).Input Voltage:DC 3.3V
3).Clip: SP3490
4).Work Temperature:-25℃~85℃
5).Work Humidity: 5%~95%RH
6).Size:50.7*26.9*10mm

3.Interface Definition:
1).Module 4P terminal side:
1.1).VCC: 3.3V
1.2).TXD:The TTL (UART) transmission of this module is connected to the RXD receiving pin of the microcontroller
1.3).RXD:The TTL (UART) receiving of this module is connected to the TXD sending pin of the microcontroller
1.4).GND:The ground wire of this module (this ground wire must be connected to the ground of the microcontroller system)
2).Module 5P terminal side:
2.1).R+/A:The A pin of this module needs to be connected to the T+/Y pin of other 422 modules
2.2).R-/B:The B pin of this module needs to be connected to the T-/Z pins of other 422 modules
2.3).T-/Z:The Z pin of this module needs to be connected to the R-/B pin of other 422 modules
2.4).T+/Y:The Y pin of this module needs to be connected to the R+/A pin of other 422 modules
2.5).GND:The ground wire of this module.If some conditions allow,the ground wire can be drawn out as the return path of the common mode signal of the signal.Of course,this wire can not be used when the conditions do not allow it.

4.Package:
1pcs TTL Mutual Conversion RS422 Module