RS232 TO RS485 (D)
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Overview
The RS232 TO RS485 (D) is an industrial-grade DIN-rail active opto-isolated RS232 to RS485 converter.
Features
- Compatible with RS232/RS485, convert RS232 signal to balanced and differential RS485 signal.
- Stable transmission rate with a stable speed of 300~115200bps
- Onboard unibody power isolation, provides stable isolation voltage, and there is no external power supply for the isolated terminal.
- Onboard unibody digital isolation, provides signal isolation with high reliability, strong anti-interference and low power consumption.
- Onboard TVS (Transient Voltage Suppressor), effectively resists the surge voltage and transient peak voltage in the circuit and provides lightninggproof and ESD protection.
- Onboard self-recovery fuse and protection diodes, ensure stable output of current and voltage, overcurrent and overvoltage protection, improves anti-shock capability.
- Onboard RS485 output terminal 120R, switch via jumper caps.
- Onboard power supply screw terminal, support 5V~36V DC wide-voltage range power input.
- Industrial grade ABS eco-friendly case, compact size, easy to install and cost-effective.
Version Options
Specification
| Model | Galvanic isolated RS232 to RS485 serial port converter | |
|---|---|---|
| Power port | Supply voltage | 5V ~ 36V |
| Protection | Anti-reverse | |
| Reliable Baudrate | 300~115200bps | |
| Device Interface | Compatible with RS232/RS485 standard | |
| RS232 | Interface | Screw terminal |
| Protection | ESD tube protection, anti-surge and ESD protection | |
| Transmission Distance | about 15m | |
| Transmission Mode | Point to point | |
| RS485 | Interface | Screw terminal |
| Direction Control | Hardware automatic control | |
| Protection | Provide 600W lightningproof, anti-surge and 15KV ESD protection | |
| Transmission Distance | about 1200m | |
| Transmission mode | Point-to-multi-point (up to 32 nodes, add the relay for up to 16 nodes) | |
| Indicator | PWR | Power indicator, connect to the power port, the red indicator is on when the voltage is detected |
| TXD | TX indicator, the green indicator is on when data is sent from RS232 interface | |
| RXD | RX indicator, the blue indicator is on when data is received from RS232 interface | |
| Appearance | Case | Rail-mount ABS eco-friendly case, suitable for 35mm DIN rail |
| Dimensions | 91.6 × 58.7 × 23.3mm | |
Application Topology
Onboard Interface
| TOP SIDE SCREW TERMINAL | BOTTOM SIDE SCREW TERMINAL | ||
|---|---|---|---|
| VCC | Power input DC 5V ~ 36V Power Supply |
120R | 120R Enable Pin Header |
| GND | Ground/ RS232 Signal Ground | SGND | RS485 Signal Ground |
| TXD | RS232 Signal Transmitting Pin | A+ | RS485 Differential Signal A+ |
| RXD | RS232 Signal Receiving Pin | B- | RS485 Differential Signal B- |
Communication Connection Diagram
RS232 to RS485 Interface Conversion, Point-to-Point, Half-Duplex Communication for Interface Conversion
RS232 to RS485 Interface Conversion, Point-to-Multipoint, Half-duplex Communication, Suitable for Expanding Communication Nodes
Point-to-point, Half-duplex Communication via Two RS232 to RS485 Interface Conversions, Suitable for Extending RS232 Communication Distance
Dimensions
Note: RS232 TO RS485 (B) and RS232 TO RS485 (D) are based on the same case mold and have the same outline dimensions, while model D has additional indicator holes.
Hardware Test
Test Description
Test environment: PC (Windows OS)
Test hardware:
- RS232 TO RS485 (D)
- USB TO RS485
- PC (If the computer does not have an RS232 interface, you can choose USB to RS232 (female connector male plug) to test the adapter.)
Test Hardware Connection
The RS232 interface of RS232 TO RS485 (D) connects to the PC with a serial extension cable or USB TO RS232 cable (female connector male plug). The RS485 interface is connected to RS232 TO RS485 (D). The USB interface of USB TO RS485 connects to the same PC and automatically tests. The hardware connection diagram is shown as below:
Note:The RS485 interface of this product also comes with 120R switch, and it is switched off by default. Users can switch it on/off through jumper wires; if you want the signals to isolate the ground, you should connect to the GND.
- On the PC, open two SSCOMs, open the corresponding port number, set the same baud rate, and click on the timing send, you can send and receive normally, the software test screenshot is as follows:
Resource
Software
Support
Technical Support
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