IC-485AI is a bidirectional isolated converter that complies with the limits for a Class A digital device pursuant to Part 15 of the FCC Rules. It is designed for use in a commercial environment to provide reasonable protection against harmful interference. The equipment generates, uses, and can radiate radio frequency energy. If not installed and used in accordance with the instruction manual, it may cause harmful interference to radio communications. Operating this equipment in a residential area is likely to cause harmful interference, and the user will be required to correct the interference at their own expense. This manual provides installation and operation procedures to prevent any damage to the unit and connected devices.
The IC-485AI is a bidirectional isolated converter that translates RS‑232 signals to RS‑422/RS‑485 (and vice versa), supporting point‑to‑point, multidrop, and simplex modes over distances up to 1200 m (4000 ft). It features built‑in optocouplers, transformer isolation, and protection against surges up to 2000 V.
This manual covers safety notices, packing contents, hardware overview, DIP‑switch settings, installation diagrams, wiring connections, specifications, troubleshooting steps, and warranty information to help users set up and maintain the device correctly.
| Power Consumption | DC 9V; 900 mW (max.) |
|---|---|
| Data Rate | Up to 115.2 Kbps under 1200 m (4000 ft.) |
| Connectors | 1 × DB‑25 female (RS‑232); 1 × 4‑post terminal block (RS‑422/RS‑485); 1 × grounding tab |
| Cable Distance | Up to 1200 m (4000 ft.) |
| Operating Temperature | 0 ~ 50 °C |
| Storage Temperature | -20 ~ 60 °C |
| Humidity | 0 ~ 80 % RH |
| Weight | 60 g |
| Dimensions (L × W × H) | 54 × 74.5 × 18.5 mm |
The IC-485AI can transmit data over a cable distance of up to 1200 m (4000 ft.).
The default baud rate is 9600 bps.
Use the DCE/DTE selection switch on the unit; set it to DCE when connecting to a DTE device and to DTE when connecting to a DCE device.