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DATAFORTH LDM485 Fully Isolated RS-232/485 Converter
DATAFORTH LDM485 Fully Isolated RS-232/485 Converter
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The LDM485 is a compact RS-232 to RS-485 converter which features a complete electrical isolation barrier and heavy duty electrical surge protectors. These devices feature a rugged aluminum enclosure small enough to mount on the back panel of typical computer equipment, saving valuable desk and floor space. Isolation is provided by optical couplers and a DC-to-DC converter. The RS-232 connection is through male or female EIA 25-pin connectors. The RS-485 connections are made through convenient solderless screw terminals.
The LDM485 series is designed for full duplex operation over two-wire pairs. Outputs are tri-state, allowing multidropping of up to 64 units. Hardware handshake is available over two separate wire pairs. Data rates are DC to 57.6k baud. Six diagnostic LED indicators are provided (see Figure 1) for installation guidance and system troubleshooting. The RS-232 interface supports Request To Send, Clear To Send, Data Set Ready, Received Line Signal Detect, and Data Terminal Ready. A convenient null modem switch is provided for the data lines. Also, a line termination switch connects a line termination resistor and line bias resistors to the RS-485 receive lines. The RS-485 interface supports Request To Send and Clear To Send on separate wire pairs. The LDM485 may be used to convert two sets of send and receive channels by using RTS and CTS circuits as the second data channels. Data rates are the same. The units use 12VAC from a wall-mounted transformer to screw terminals 1 and 2 on the RS-485 connector. Alternately, they can use ±12VDC to pins 9 (+) and 10 (-) of the RS-232 connector.
Features
- Complete Isolation with Optical Couplers and Power DC-to-DC Converter
- Industrial Surge Protection Devices
- Six LED Diagnostic Indicators
- 19.2K Baud at 3 Miles (5km), 57.6K Baud at 0.5 Miles (0.8 km)
- Request-To-Send, Clear-To-Send Handshake
- Tri-state Outputs for Multidrop Applications, Up to 64 Devices
- Selection of Connectors
- Wide Operating Temperature Range
- Solderless Screw Terminal Field Connections
- CE Compliant
Block Diagram
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We help businesses, engineers, and tech enthusiasts access premium products at a fraction of the original price — always tested and verified.
Every item undergoes a thorough functionality check before shipping.
That means you get “as-new” performance for up to 70% less than retail price. Then it is difficult to justify the purchase of a brand new HMI, IoT or Measurement device.
- Always tested and verified.
- Always fast delivery.
- Always warranty & 30-day return policy.
Sustainability & Social Impact
Most of a product’s environmental footprint is created during manufacturing — from CO₂ emissions to water consumption and raw material waste. By giving surplus and demo units a second life, you help cut e-waste, reduce emissions, and save valuable resources.
But impact goes beyond the environment. Each year we proudly donate a portion of our revenue to Stockholm Stadsmission, supporting people in need. With every purchase, you make a choice that’s better for the planet — and better for society.
Everything You Need to Know Before Buying from Outlecta
FAQs
What kind of products does Outlecta offer?
We specialize in surplus and demo units within HMI, IoT, and measurement technology from trusted industrial brands. All items are fully tested and verified.
Are the products new or used?
Most items are surplus stock, demo equipment, or unused overstock from manufacturers and integrators. They perform like new but come at outlet pricing.
Do products come with a warranty?
Yes — all Outlecta products include a 12-month warranty and a 30-day return policy for peace of mind.
How much can I save compared to buying new?
Customers typically save 30–70% compared to original retail prices, while still getting full industrial quality and performance.
How does buying from Outlecta help the environment?
Extending the lifetime of technology reduces CO₂ emissions, raw material extraction, and e-waste. Every purchase contributes to a more sustainable industry.
Do you provide shipping internationally?
Yes, Outlecta ships worldwide. Delivery times and shipping costs vary depending on location, but we always ensure fast and secure handling.
Can companies sell surplus hardware to Outlecta?
Absolutely. We actively buy surplus and overstock from businesses. Contact us to discuss how we can help you free up capital and reduce waste.
How do I know if a product will fit my application?
Our product descriptions include detailed specifications. If you need support, our team can guide you to the right HMI, IoT, or measurement solution.
What payment options do you offer?
We support major credit cards, PayPal, and international transfers. For B2B customers, invoice and custom arrangements are also possible.
Does Outlecta give back to society?
Yes — every Christmas, a portion of our revenue is donated through our parent company, Telac Elektronik, to Stockholm Stadsmission in support of children in vulnerable situations.
By choosing Outlecta, you help us give technology a second life and bring joy to those who need it most.