> **Source:** Core Electronics is an Australian maker-electronics retailer and manufacturer based in Newcastle, NSW, run by a team of makers and educators. We design and manufacture our own product lines (PiicoDev, CE originals) and are official retailers for iconic maker and industrial brands including Raspberry Pi, Arduino, Adafruit, SparkFun and DFRobot. Orders ship Australia-wide from our Newcastle warehouse. Prices are in AUD and include GST. Pricing, stock and dispatch on this page are generated from the store's live catalog. Full machine-readable index: https://core-electronics.com.au/llms.txt

# RS-232 to RS-485 Converter

**Type:** Product page · **SKU:** TEL0038 · **Brand:** [DFRobot](https://core-electronics.com.au/brands/dfrobot-australia)
**Page:** https://core-electronics.com.au/rs-232-to-rs-485-converter.html ([markdown](https://core-electronics.com.au/rs-232-to-rs-485-converter.html.md))

This is a simple RS232 to RS485 converter that is self powered using the TX, RX or RTS, CTS signals for power. The RS232 is DB9 female connector, and the RS485 side is a DB9 male or 4 position terminal block.

## Pricing

- **Price:** $10.90 (inc GST) — $9.91 AUD, exc GST
- **Quantity discounts:** 6+ $9.42 (exc GST) · 12+ $9.02 (exc GST)

## Availability & dispatch

- In stock, ships same business day if ordered before 2PM (Australia/Sydney).
- We can dispatch 1 today, and up to 120 more in 8–12 days.

## How to buy

- **Build a cart:** compose `https://core-electronics.com.au/cart/link?items=TEL0038:1` (comma-separated SKU:qty pairs) and share the link. Opening it shows a confirmation page with live pricing and stock before anything is added to the cart.
- **Verify the cart first:** fetch `https://core-electronics.com.au/cart/link/TEL0038:1.md` for live line prices (inc & exc GST, quantity discounts applied), stock and dispatch estimates, and totals. Append `/to/{AU-postcode}` (or `/to/{country-code}:{postcode}`) before `.md` for delivery options and prices to that destination. Unknown, retired, or out-of-stock SKUs are flagged. (Query form `cart/link.md?items=...` also works but some robots parsers refuse query strings here.)
- **Checkout** is completed on-site and includes a captcha at the payment step. Share the cart link; checkout takes it from there.
- **Search the catalogue:** `https://core-electronics.com.au/search/{query}.md` (URL-encode the query; pages 2-3 at `search/{query}/{page}.md`; `search.md?q=` also works)
- **Payment methods, purchase orders, policies and contact details:** https://core-electronics.com.au/llms.txt
## Description

This is a simple RS232 to RS485 converter that is self powered using the TX, RX or RTS, CTS signals for power. The RS232 is DB9 female connector, and the RS485 side is a DB9 male or 4 position terminal block.

It is able to convert RS232 signal to RS485 balanced differential signal and extend the communication distance to 1.2km,

It is passive and doesn't require external power.

It is compatible with DFRobot's [URM04 ultrasonic sensor](https://core-electronics.com.au/urm04-v2-0-ultrasonic-sensor.html).

### Specification

- Opto isolation
- Lighting & surge protectors
- Compatible withEIA/TIA RS232 Standard and RS485 Standard
- Working Mode:Asynchronous, Half-duplex, Differential Transmission
- Transmission Media:Twisted Pair or Shielded Twisted Pair
- Transmission Rate:300bps -115.2K bps
- Transmission Distance:1200m(RS485), 5m(RS232)
- Working Environment:25 -70 degree (Temperature) , 5% - 95% (Humidity)
- Dimension:89mm x 33.3mm x 17mm(L \* W \* T)
- Net Weight: 36g
- CE/FCC/Rohs Compliant

## Images

- [Product image 1](https://core-electronics.com.au/media/catalog/product/t/e/tel0038-1.jpg)