Raspberry Pi Compute Module 4 IO Board With PoE Feature (Type B), for all Variants of CM4

SKU: 20157
Part Number: Compute Module 4 PoE Board (B)
Brand: Waveshare


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Raspberry Pi Compute Module 4 IO Board with PoE Feature (Type B), for all Variants of CM4
Compute Module 4 PoE Board (B)

suitable for evaluating the Raspberry Pi CM4 or being integrated into end products

PoE Base Board for all Compute Module 4 Variants

What's the differences
CM4 IO Board
mini Base

Dual Gigabit ETH

PoE Base (B)

PoE Base

Raspberry Pi official
Lite Ver. Full Ver.
PoE N/A integrates 802.3af-compliant PoE circuit (5V/2.5A) PoE header only
USB USB 2.0 × 2
USB 2.0 × 2 (via FFC connector)
USB 3.2 Gen1 × 3 USB 2.0 × 4 USB 3.2 Gen1 × 4 USB 2.0 × 4
(2x via pin header)
GPIO Raspberry Pi 40PIN GPIO × 1
Header M.2 slot × 1 N/A RS485 × 1
RS232 × 1
PCIe Gen 2 × 1
N/A PCIe Gen 2 × 1
(1x via FFC connector)
supports 4K 30fps output
HDMI × 2
supports 4K 30fps output
DSI Display MIPI DSI × 1
(15pin 1.0mm FPC)
(15pin 1.0mm FPC)
(22pin 0.5mm FPC)
CSI Camera MIPI CSI-2 × 2
(15pin 1.0mm FPC)
MIPI CSI-2 × 2
(22pin 0.5mm FPC)
Power Input 5V 7V~36V 5V 7V~36V 12V
Fan 5V 5V / 12V 12V
no fan control allows speed adjustment and measurement
RTC N/A Real-time clock with battery socket and ability to wake Compute Module 4
RJ45 Ethernet Gigabit Ethernet Dual Gigabit Ethernet Gigabit Ethernet
CM4 Socket suitable for all variants of Compute Module 4
SD Card Slot MicroSD card socket for Compute Module 4 Lite (without eMMC) variants
Dimensions (mm) 85.0 × 56.0 109.0 × 91.5 124.50 × 108.80 160 × 90
Connecting with Compute Module 4

standard CM4 socket and color-coded Raspberry Pi 40PIN GPIO header
suitable for all variants of Compute Module 4

Rich peripheral connectors

onboard connectors including CSI/DSI/HDMI/USB/ETH/PCIe/RS232/RS485

What's On Board
  1. CM4 socket
    suitable for all variants of Compute Module 4
  2. 40PIN GPIO header
  3. BOOT selection
    ON: CM4 would be booted from USB-C interface
    OFF: CM4 would be booted from eMMC or Micro SD card
  4. Misc functional pins
  5. USB Type-C power supply / programming
    5V/2.5A power supply,
    also allows burning system image into Compute Module 4 eMMC variants
  6. Status indicators
    ACT: Raspberry Pi operating status indicator
    PWR: Raspberry Pi power indicator
  7. DISP
    2x MIPI DSI display port
  8. CAM
    2x MIPI CSI camera ports
  9. USB2.0 ports
    4x USB2.0 ports, for connecting sorts of USB devices
  1. HDMI ports
    2x HDMI ports, supports dual 4K 30fps output
  2. RTC battery holder
    supports CR1220 button cell
  3. FAN header
    for connecting cooling fan, allows speed adjustment and measurement
  4. PCIe Gen 2 × 1 socket
    forconnecting PCIe Gen 2 × 1 modules
  5. Gigabit Ethernet connector
    Gigabit Ethernet RJ45 with PoE support, 10/100/1000M compatible
  6. DC 5V output
  7. RS485
    with 600W lightningproof, anti-surge, and 15KV ESD protection,
    reversed optional 120R balancing resistor jumper
  8. RS232
    with TVS diode, anti-surge, and ESD protection
  9. Buzzer
  10. FAN_VDD/PoE selection
    cooling fan driving voltage: 12V or 5V
    PoE: enable (EN) or disable (DIS)
  1. FE1.1S
    USB expansion chip
  2. PCF52063ATL
    RTC chip
  3. RTC/FAN
    I2C bus switch,
    SDA0/SCL0: I2C-10 is shared with CSI/DSI
    GPIO3/2: I2C-1 is shared with 40PIN header
  4. IO logic level selection
    set the CM4 IO logic level as 3.3V or 1.8V
  1. RTC interruption configuration
    PI-RUN: CM4 will reboot on RTC interruption
    GN-EN: CM4 powerdown on RTC interruption
    D4: D4 pin is triggered on RTC interruption
  2. Micro SD card slot
    insert a Micro SD card with pre-burnt system, to start up Compute Module 4 Lite
Outline dimensions
Application example

suitable for PoE Powered Raspberry Pi Projects, Or Other Industrial Context

for reference only, CM4, display, and cameras are NOT included.
Resources & Services

* Resources for different product may vary, please check the wiki page to confirm the actually provided resources.

Weight: 0.106 kg

Quick Overview

  1. Compute Module 4 PoE Board (B) x1