IC232485S - Uncategorized StarTech.com - Free user manual and instructions
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| Product Type | RS-232 to RS-485 Serial Converter |
| Brand | StarTech.com |
| Model | IC232485S |
| RS-232 Connector | 1 x DB9 Female |
| RS-485 Connector | 4-pin screw terminal (A, B, GND, GND) |
| Data Rate | Up to 115.2 kbps |
| Transmission Distance | Up to 1200 m (RS-485) |
| Power Supply | Powered from RS-232 port (5V) |
| Power Consumption | 0.5 W typical |
| Surge Protection | 15 kV ESD protection on all serial lines |
| Termination & Bias | 3-position DIP switch (120Ω termination, biasing) |
| Operating Temperature | -40°C to 85°C (-40°F to 185°F) |
| Storage Temperature | -55°C to 125°C (-67°F to 257°F) |
| Humidity | 5% to 95% RH non-condensing |
| Enclosure Material | Aluminum metal case |
| Dimensions (W x D x H) | 58 x 37 x 18 mm (2.3 x 1.5 x 0.7 in) |
| Weight | 25 g (0.9 oz) |
| Certifications | CE, RoHS, WEEE |
| Warranty & Support | 1-year warranty, free lifetime technical support |
| Maintenance & Cleaning | No regular maintenance; wipe with a dry cloth |
| Safety & Repairability | Fully enclosed metal case; no user-serviceable parts |
Frequently Asked Questions - IC232485S StarTech.com
Does the IC232485S require an external power supply?
No, the IC232485S is powered directly from the RS-232 port using the DTR and RTS lines, so no external power adapter is needed. This simplifies installation in industrial environments.
How do I wire the RS-485 screw terminals?
Connect the A terminal to the corresponding A signal of your RS-485 device, B to B, and optionally connect GND to ground. For half-duplex communication, use a twisted pair cable and keep the shielding connected to GND at one end.
What is the maximum data rate supported?
The converter supports data rates up to 115.2 kbps, which is sufficient for most industrial monitoring and control applications. At lower baud rates, the transmission distance can reach up to 1200 meters.
How do I set the DIP switches for termination and biasing?
The 3-position DIP switch controls 120Ω termination and fail-safe biasing. For a point-to-point link, set switch 1 to ON to enable termination. For multi-drop RS-485 networks, enable termination only at the two physical endpoints.
Can I use this converter to extend RS-232 communication distance?
Yes. By converting RS-232 to RS-485 differential signaling, you can extend communication distances up to 1200 meters, compared to the standard 15 meters for native RS-232.
Is the IC232485S suitable for harsh industrial environments?
Absolutely. It features an industrial temperature range from -40°C to 85°C, a rugged metal case, and 15 kV ESD protection, making it ideal for factory floors and outdoor installations.
Does it work with 3.3V or 5V TTL signals?
The RS-232 side accepts standard RS-232 voltage levels (up to ±12V), and the RS-485 side uses standard differential signals. For TTL interfaces, use an appropriate level shifter or a dedicated TTL-to-RS485 converter.
What do the LED indicators show?
The converter typically has power and TX/RX LEDs that show communication activity. A lit power LED indicates the RS-232 port is providing power, while flashing TX/RX LEDs confirm data transmission.
Is the converter hot-swappable?
Yes, the IC232485S is hot-swappable because it has built-in ESD protection and does not disrupt serial standards. However, always ensure your system is properly grounded before connecting.
How can I get technical support for this product?
StarTech.com provides free lifetime technical support and a 1-year warranty. You can contact them via phone, email, or online chat. The manual can be downloaded from the product page for wiring diagrams and troubleshooting.
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USER MANUAL IC232485S StarTech.com
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Product information
Brand : StarTech.com
Model : IC232485S
Category : Uncategorized