Description
My name is CM4-ETH-RS485-BASE-B, which is an expansion board that can be used with Raspberry Pi Compute Module 4, and supports 7-36V DC power supply and 5V DC DC power supply of Typc-C interface. Onboard four isolated RS485 interfaces, 100M+1000M dual network ports, HDMI interface, two CSI interfaces and two USB interfaces, etc…
Applications:
Suitable For Raspberry Pi Applications Requiring Multi-Channel RS485 Communication Or Other Industrial Context
Features:
- Do not plug and unplug any device except USB and HDMI when it is powered on
- Confirm the fan voltage before connecting, only support 5V
- The Type C interface can be used as a power supply or as a USB interface to burn the image (need to use the DIP switch to switch)
- In order to ensure the normal power supply of CM4, please do not connect other devices when using the Type C interface to burn the image.
- When CM4 is in normal use, it needs to provide 5V 2A power supply for CM4. Otherwise, there may be problems such as automatic shutdown, frequency reduction and so on.
- USB2.0 is closed by default, if you need to open it, you need to add dtoverlay=dwc2,dr_mode=host in config.txt
Specification:
- Power Input: 7-36V
- CM4 Socket: suitable for all variants of Compute Module 4
- Networking: Gigabit Ethernet RJ45 connector, 100M Ethernet RJ45 connector
- Connector: Isolated RS485 × 4, Power screw terminal × 1
- USB: USB 2.0 Type A × 2
- Camera: MIPI CSI-2 port × 2 (15pin 1.0mm FPC connector)
- Video: HDMI port × 1, supports 4K 30fps output
- RTC: Real-time clock with battery socket and ability to wake Compute Module 4
- Storage: MicroSD card socket for Compute Module 4 Lite (without eMMC) variants
- Fan Heater: allows speed adjustment, 5V
- Indicator: Power indicator × 1, CM4 status indicator × 1, User LED × 2, RS485 communication indicator × 8
Packages Includes:
1 x Waveshare Dual ETH Quad RS485 Base Board (B) for Raspberry Pi Compute Module 4, Gigabit Ethernet, 4CH Isolated RS485
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