Mounting and cutout
- Housing
- plastic
- Dimensions
- 71 × 33 × 16.5 mm
- Weight
- 30 g
SW485A
SW485A RS-232 to RS-485 Converter
The 3onedata SW485A is a passive pocket converter for bidirectional communication between one RS-232 port and one RS-485 port. Its official datasheet lists DB9 female RS-232, a 4-pin 5.08 mm RS-485 terminal block, up to 1,200 m on RS-485, 600 W surge and 15 kV electrostatic protection, -40 to +80 °C operation, and serial-port power with no external supply. System fit is subject to engineering review.
- Serial conversion
- 1 × RS-232 ↔ 1 × RS-485
- Connectors
- DB9 female · 4-pin terminal
- Published RS-485 reach
- Up to 1,200 m
- Power and temperature
- Port-powered · -40 to +80 °C
Lead time confirmed within 1 business day
1business day first reply
Replacement and compatibility
Protocols and drivers
- Serial Ports
- 1 × RS-232; 1 × RS-485
Application evidence
| Model | SW485A |
|---|---|
| Standards | EIA RS-232C; EIA RS-485 |
| Serial Ports | 1 × RS-232; 1 × RS-485 |
| Rs 232 Signals | TXD, RXD, GND |
| Rs 485 Signals | D+, D-, GND |
| Connectors | RS-232: DB9 female; RS-485: 4-pin 5.08 mm terminal block |
| Published Transmission Distance | RS-232: 15 m; RS-485: 1200 m |
| Direction Control | automatic RS-485 data-flow direction control |
| Published Load Capacity | 32-point RS-485 polling environment; 128-point option is customized |
| Interface Protection | 600 W surge protection; 15 kV electrostatic protection |
| Power Requirement | no external supply; powered from RS-232 TXD, RTS and DTR signals |
| Power Consumption | static ≤10 mA; dynamic mean ≤40 mA |
| Operating Temperature | -40 to +80 °C |
| Storage Temperature | -40 to +85 °C |
| Humidity | 5%–95% RH, non-condensing |
| Housing | plastic |
| Dimensions | 71 × 33 × 16.5 mm |
| Weight | 30 g |
| Certifications | CE, FCC, RoHS |
| Warranty | 3 years |
| Model number | SW485A |
|---|---|
| Brand | 3onedata |
| Category | Communication Modules |
| Certification | CE, FCC, RoHS |
| Availability | Availability confirmed at RFQ |
Frequently asked
Does the SW485A need an external power supply?
No external supply is listed. The official datasheet says SW485A obtains power from the RS-232 TXD, RTS and DTR signal lines. The host port and signal behavior still need to be checked during engineering review.
What connectors does the SW485A use for RS-232 and RS-485?
The RS-232 side uses a female DB9 connector. The RS-485 side uses a 4-pin terminal block with 5.08 mm pitch for D+, D- and GND.
How far can the SW485A transmit over RS-485?
The official datasheet publishes 1,200 m for RS-485 and 15 m for RS-232. Actual reach depends on cable, grounding, topology, termination, baud rate and electrical noise, and remains subject to engineering review.
Request quotation
Send the application, quantity and target date. We will check fit and availability.
What we check
We check the ports, topology, protocol map, timing and management needs before selecting the SW485A.
Power is taken from the host RS-232 TXD, RTS and DTR signals, so the host serial-port electrical behavior must be reviewed
The published 15 m RS-232 and 1,200 m RS-485 distances are not guarantees for every cable, topology or noise environment
The standard published load is a 32-point RS-485 polling environment
the stated 128-point option is customized, not the base model
The official datasheet does not state galvanic isolation, so isolation must not be assumed
Application fit is subject to engineering review
availability and lead time are confirmed at RFQ