

Product Specifications
Manufacturer: KUNBUS GmbH
Part Number: RevPi Flat S
Product Type: DIN Rail Soft PLC
Core Module: Raspberry Pi CM4S
Integrated I/O: 1 DO + 1 AI + 1 AO
Communication: 4×Ethernet, 2×Isolated RS485
Power Supply: 24 V DC
Operating Temperature: -20 … +55 °C
Product Description
The KUNBUS RevPi Flat S is a robust, non-modular DIN rail industrial PC designed for IIoT and automation projects. It combines the flexibility of the Raspberry Pi ecosystem with industrial-grade hardware, making it ideal for building automation, energy management, and edge computing applications.
At its heart is the Raspberry Pi Compute Module 4S with a 1.5GHz quad-core processor, 1GB RAM, and 32GB eMMC flash memory. The device features 4×10/100Mbps Ethernet ports with support for 2 or 4 separate MAC addresses, 2×galvanically isolated RS485 ports, 2×USB 2.0 ports, and 1×Micro USB port for image transfer.
The RevPi Flat S includes integrated I/O: 1 digital output, 1 analog input, and 1 analog output, eliminating the need for additional modules in many basic applications. It supports a wide range of programming languages and environments including Python, C/C++, Node-RED, and CODESYS, allowing developers to use the tools they are most familiar with.
The unit operates on 24V DC power supply and withstands an industrial temperature range of -20°C to +55°C. Typical applications include building automation, energy monitoring, data logging, and IoT gateways.
Technical Specifications
| Parameter | Value |
|---|---|
| Manufacturer | KUNBUS GmbH |
| Part Number | RevPi Flat S (100371) |
| Product Type | DIN Rail Industrial PC / Soft PLC |
| Core Module | Raspberry Pi Compute Module 4S |
| Processor | Broadcom BCM2711, Quad-core Cortex-A72, 1.5GHz |
| RAM | 1GB LPDDR4 |
| Storage | 32GB eMMC |
| Ethernet | 4×10/100Mbps, 2/4 separate MAC addresses |
| RS485 | 2×galvanically isolated, max. 500kbps |
| USB | 2×USB 2.0 A, 1×Micro USB (image transfer only) |
| Integrated I/O | 1 DO, 1 AI (0-10V), 1 AO (0-10V) |
| Power Supply | 24V DC (12.0…28.8V DC), max. 15W |
| Operating Temperature | -20 … +55 °C |
| Storage Temperature | -40 … +85 °C |
| Protection Degree | IP20 |
| Mounting | 35mm DIN rail (EN 50022-35) |
| Dimensions | 140 × 93.6 × 22.5 mm (W × H × D) |
KUNBUS RevPi Flat S DIN Rail PLC, Based on Raspberry Pi CM4S, 4×Ethernet, 2×RS485
Product Specifications
Manufacturer: KUNBUS GmbH
Part Number: RevPi Flat S
Product Type: DIN Rail Soft PLC
Core Module: Raspberry Pi CM4S
Integrated I/O: 1 DO + 1 AI + 1 AO
Communication: 4×Ethernet, 2×Isolated RS485
Power Supply: 24 V DC
Operating Temperature: -20 … +55 °C









