RS232 TO RS485/422
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Overview
RS232 TO RS485/422, an industrial grade RS232 to RS485/422 isolated converter, boasts industrial grade rail-mount case design and protection circuits such as the built-in power isolation, ADI magnetical isolation, and TVS diode. It is easy to operate RS232 TO RS485/422 as it features zero-delay automatic transmission conversion, faster communication speed, stability, reliability, and safety, which is applicable for scenarios with high communication requirements.
Features
- Onboard SP3232EEN and SP485EEN chips. Fast communication, stable and reliable, better compatibility.
- Stable transmission at the rate of 300~921600bps.
- Onboard unibody power supply isolation, provides stable isolated voltage and needs no extra power supply for the isolated terminal.
- Onboard unibody digital isolation, allows signal isolation, high reliability, strong anti-interference, and low power consumption.
- Onboard TVS (Transient Voltage Suppressor), effectively suppresses surge voltage and transient spike voltage in the circuit, lightning-proof & anti-electrostatic.
- Onboard self-recovery fuse and protection diodes, ensure the current/voltage stable outputs, provide over-current/over-voltage proof, and improve shockproof performance.
- Onboard 15KV ESD isolation protection and 600W lightning proof & anti-surge protection.
- Onboard 120R terminal resistor on the RS485/RS422 interface, disabled by default, configurable by jumper.
- Onboard power supply screw terminal, allows 5V~36V DC wide-range input.
- 3 LEDs for indicating the power and transceiver status.
- Industrial rail-mount ABS case design, small in size, easy to install, and cost-effective.
Version Selection
Parameters
| PRODUCT TYPE | Active digital isolated RS232 to RS485/422 serial converter | |
| BAUD RATE | 300bps ~ 921600bps | |
| HOST PORT | RS232 | |
| DEVICE PORT | RS485/422 | |
| RS232 | Connector | DB9 male/female |
| RS485/422 | Connector | Screw terminal |
| RS485 | A+, B-, GND | |
| RS422 | TA, TB, RA, RB, GND | |
| Direction control | Hardware automatic control | |
| Protection | 600W lightningproof and surge-suppress, 15KV ESD protection (Onboard 120ohm balancing resistor) | |
| Transmission distance | About 1200m (in low-speed scenario) | |
| Transmission Mode | Point-to-multipoint (up to 32 nodes, it is recommended to use repeaters for 16 nodes or more) | |
| Indicator | PWR | Red power indicator, lights up when the voltage is detected |
| TXD | Green TX indicator, lights up when the RS232 port sends data | |
| RXD | Blue RX indicator, lights up when the device ports send data back to RS232 | |
| ENVIRONMENT REQUIREMENTS | Temperature Range | -40℃ ~85℃ |
| Appearance | Case | Rail-mount ABS case, suitable for 35mm DIN rail |
| Dimensions | 81.9 × 54.0 × 32.0mm | |
Onboard Interface
Dimensions
Function Test
Here we take USB TO 4CH Serial Converter as the example:
RS232 TO RS485 Test
Hardware Connection
RS232 TO RS485/422 USB TO 4CH Serial Converter RS485 - A+ Port C - TA RS485 - B- Port C - TB RS485 - GND Port C - GND RS232 - RXD Port D - TXD RS232 - TXD Port D - RXD RS232 - GND Port D - GND
Software Operation
- Open two SSCOM interfaces.
- Select the COM port corresponding to Port C and Port D of the USB TO 4CH Serial Converter respectively.
- Input the characters to be sent, select "Show Time and Packet" to view it more intuitively, and then click on "Open COM".
- Both select the 100ms of the SSCOM, and you can see the effect.
RS232 TO RS422 Test
Hardware Connection
| RS232 TO RS485/422 | USB TO 4CH Serial Converter |
| RS422 - TA | Port C - RA |
| RS422 - TB | Port C - RB |
| RS422 - RA | Port C - TA |
| RS422 - RB | Port C - TB |
| RS422 - GND | Port C - GND |
| RS232 - RXD | Port D - TXD |
| RS232 - TXD | Port D - RXD |
| RS232 - GND | Port D - GND |
Software Operation
- Open two SSCOM interfaces.
- Select the COM port corresponding to Port C and Port D of the USB TO 4CH Serial Converter respectively.
- Input the characters to be sent, select "Show Time and Packet" to view it more intuitively, and then click on "Open COM".
- Both select the 100ms of the SSCOM, and you can see the effect.
Resource
Datasheet
FAQ
Yes, if the 120R matching resistor must be modified, move the jumper cap to the 120R position on the RS485/422 terminal.
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Move the jumper cap of RS485/422 to the 120 ohm position.
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Remove the two 120Ω termination matching resistors of RS485/422 and jump the jumper cap to NC.
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Support
Technical Support
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