The brand new RevPi Connect 4 is a modular, open-source device based on the Raspberry Pi CM4, powered by a Broadcom BCM2711 processor. It has up to 32 GB eMMC memory, optional WLAN/Bluetooth, and can be expanded with up to ten I/O modules. It has multiple interfaces, an integrated RTC, hardware watchdog, and HAT EEPROM. The pre-installed Raspberry Pi OS is customized and supports Modbus RTU/TCP, MQTT, and OPC UA protocols. Custom app development is possible with Node-RED, Python, and C. The modular design allows for easy expansion with digital/analog I/Os, fieldbus gateways, and radio modules.
New features:
- Faster processor (Broadcom BCM2711)
- WLAN and Bluetooth support (optional)
- Easier I/O expansion with plug-and-play GUI
- Real-time clock (RTC) now battery-buffered
For a detailed comparison of the technical distinctions among the different RevPi Connect variants, please refer to this page.
- Based on Raspberry Pi Compute Module 4 (CM4)
- Processor: Broadcom BCM2711 a 64-bit quad-core Arm Cortex-A72
- DIN rail housing for easy mounting in industrial environments
- 2 x RJ45 GBit Ethernet interfaces for high-speed connections
- 2 x USB 3.2 Gen1 interfaces
- 1 x RS485 interface
- 1 x Micro-HDMI interface for connecting a monitor or display
- 1 x Micro-USB port
- 1 x RP-SMA socket for connecting an external WLAN/BT antenna (2.4/ 5 GHz), not available on Article No. 100376 and 100378
- 2 x PiBridge (expandable with up to 10 I/O modules)
- WLAN and Bluetooth connectivity via the internal antenna or optionally through an external antenna connected to the new SMA socket
- HAT EEPROM for storing device information such as type, serial number, and MAC address
- Real-time clock (RTC) stored by using an integrated battery
- Hardware watchdog
- Six RGB LEDs on the front panel (five individually programmable)
- Pre-installed customized 64-Bit Raspberry Pi OS with real-time patch and process image
- Default support for Modbus RTU and Modbus TCP with client and server functionalities
- User-specific control and HMI software can be optionally used
- Supports protocols like MQTT and OPC UA
- Simplifies programming of custom applications with Node-RED, Python, and C
Housing dimensions (HxWxD) | 96 x 45 x 110.5 mm |
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Housing type | DIN rail housing (for DIN rail version EN 50022) |
Housing material | Polycarbonate |
Weight | approx. 197 g / 224 g (incl. connectors) |
IP Code | IP20 |
Power supply | 10.8 ... 28.8 V DC |
Max. power consumption | 20 W (incl. 2 x 900 mA USB load) |
Operating temperature | -25 °C to +55 °C |
Storage temperature | -40 °C to +85 °C |
Humidity (40 °C) | up to 93 % (non-condensing) |
Interfaces | 2 x USB A 3.2 Gen 1 2 x RJ45 10/100 Ethernet (using separate MAC addresses) 1 x RS485 screw-type terminal 1 x Micro-USB (solely for image transfer to eMMC) 1 x Micro HDMI 2.0a (4K) 2 x PiBridge system bus |
Connectors |
3 x 4-pole screw-type terminals for RS485, power and relay contact /signal output |
Processor | Broadcom BCM2711, quad-core Arm Cortex-A72 |
Clock rate | 1.5 GHz |
Processor cooling | Passive with heat sink |
RAM | 2 GB LPDDR4 (Article No.: 100376, 100377), 4 GB LPDDR4 (Article No.: 100378, 100379), 8 GB LPDDR4 (Article No.: 100380) |
Flash memory | 8 GB (Article No.: 100376, 100377), 32 GB (Article No.: 100378, 100379, 100380) |
Number of digital input channels | 1 |
Input Type | 24 V control voltage (e.g. for power-good signal of a UPS) |
Input Threshold | approx. 10 V DC (0 -> 1) resp. 7 V DC (1 -> 0); input current 2.4 mA (according to IEC 61131-2) |
Number of digital output channels | 1 |
Output type | opto-decoupled solid state relay, normally open, max. 30 V, 300 mA DC, any polarity |
Software interface for input and output | Via GPIOs and process image. |
Hardware watchdog functionality | Watchdog in RTC device, freely configurable watchdog character device |
Compatible modules for system expansion | All RevPi IO modules can be connected via the PiBridge system bus. Up to 5 modules can be connected on each side of the device. |
EMC interference emission | according to IEC 61000-6-4 Emission standard for industrial environments |
EMC immunity | according to IEC 61000-6-2 Immunity standard for industrial environments |
RTC Buffer | CR2032 lithium battery, lifetime approx. 10 years |
Optical indicator | 6 status LEDs; 5 x red/green/blue, freely programmable, 1 x red/green |
RoHS conformity | Yes |
CE conformity | Yes |
Technical Data Sheet |
RevPi Connect 4 Technical Data Sheet |