Finder 8A.04.9.024.8300 8A Series – OPTA Arduino Programmable Logic Relay
The Finder 8A.04.9.024.8300 is the OPTA Lite programmable logic relay (PLR) that blends compact size with industrial capability. It offers 8 configurable inputs (digital or 0â10 V analogue), 4 relay outputs rated for real-world loads, built-in Ethernet and USB-C for programming and diagnostics, and DIN-rail mounting for quick panel integration.
Why Choose the Finder 8A.04.9.024.8300 OPTA LITE Programmable Logic Relay [8A.04.9.024.8300]?
The Finder 8A.04.9.024.8300 is the OPTA LITE programmable logic relay from the 8A series – a compact, Arduino-compatible controller for industrial and building automation. It combines flexible I/O with relay outputs in a DIN-rail housing.
The LITE version provides USB Type-C for programming and an RJ45 Ethernet port (Modbus TCP/IP). Like all OPTA models it can be programmed both with traditional IEC 61131-3 languages (Ladder, FBD, etc.) and with the open-source Arduino IDE.
Key Features
OPTA LITE programmable logic relay
8 digital/analog inputs (0–10 V, 0–24 V)
4 NO relay outputs, 10 A
USB Type-C for programming and data
RJ45 Ethernet / Modbus TCP/IP
IEC 61131-3 and Arduino IDE programmable
Applications
Pump and control panel automation
Compact machine control
Building automation
Edge and IIoT projects
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Technical Specifications
Current
8 A
Manufacturer
Finder
Series
8A Series – OPTA
Model
8A.04.9.024.8300 (LITE)
Supply Voltage
12–24 V DC
Inputs
8 digital/analog (0–10 V, 0–24 V)
Outputs
4 x NO relay, 10 A
Programming
USB Type-C
Connectivity
Ethernet / Modbus TCP/IP
Frequently Asked Questions
How is the OPTA programmed?
It can be programmed with standard IEC 61131-3 languages (Ladder, FBD, etc.) and with the open-source Arduino IDE.
What connectivity does the LITE version offer?
The LITE version (8300) provides USB Type-C and an RJ45 Ethernet port for Modbus TCP/IP.
What I/O is available?
8 digital/analog inputs (0–10 V, 0–24 V) and 4 NO relay outputs rated 10 A.
What is the product code for this item?
The product SKU / order code is 8A.04.9.024.8300.
Where can I find standards and approvals?
Please refer to the manufacturer's data sheet for full standards, approvals and detailed specifications.
Current
8 A
Manufacturer
Finder
Series
8A Series – OPTA
Model
8A.04.9.024.8300 (LITE)
Supply Voltage
12–24 V DC
Inputs
8 digital/analog (0–10 V, 0–24 V)
Outputs
4 x NO relay, 10 A
Programming
USB Type-C
Connectivity
Ethernet / Modbus TCP/IP
No documents available for this product.
Delivery
We offer fast UK delivery on all stocked items. Orders placed before 3pm Monday to Friday are eligible for next-day delivery.
Standard delivery: 2–3 working days
Next-day delivery: available on in-stock items when ordered before 3pm
Express options available — contact us for details
Returns
If you need to return an item, please contact our sales team within 30 days of receipt. Items must be returned unused in their original packaging.
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LED Controls is a specialist distributor of factory automation and industrial controls, supplying OEMs, machine builders, panel builders and end users throughout the UK and worldwide. As a trusted UK distributor for many of the world’s leading automation manufacturers, we provide industrial control products, technical expertise and bespoke automation solutions backed by outstanding customer service.
2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...
2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...