SKU:WSAL21666

Dual ETH Quad RS485 Base Board (B) for Raspberry Pi Compute Module 4, Gigabit Ethernet, 4CH Isolated RS485

Name: Dual ETH Quad RS485 Base Board (B) for Raspberry Pi Compute Module 4, Gigabit Ethernet, 4CH Isolated RS485
Brand: WaveShare
SKU: WSAL21666
Price: 26183.72 HUF
Availability: InStock

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Kurzbeschreibung: Dual ETH Quad RS485 Base Board (B) For Raspberry Pi Compute Module 4, Gigabit Ethernet, 4CH Isolated RS485, USB2.0

Dual ETH Quad RS485 Base Board (B) for Raspberry Pi Compute Module 4, Gigabit Ethernet, 4CH Isolated RS485, USB2.0

Dual ETH Quad RS485 Base Board for CM4

Designed For Raspberry Pi Compute Module 4

Specifications

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 header	allows speed adjustment, 5V
Indicator	Power indicator × 1, CM4 status indicator × 1, User LED × 2, RS485 communication indicator × 8
Power input	7-36V
Dimensions	93.6 × 108.8mm

Connecting with Compute Module 4

standard CM4 socket and suitable for all variants of Compute Module 4

More Rich Interfaces

Various Interfaces Including: Dual ETH / RS485 / CSI / FAN / HDMI / Micro SD / USB

Application Examples

Suitable For Raspberry Pi Applications requiring Multi-Channel RS485 Communication Or Other Industrial Context

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

What's On Board

CM4 socket suitable for all variants of Compute Module 4
IO-VREF Set the CM4 IO logic level as 3.3V (default) or 1.8V
RTC-12C: 12C bus selection for RTC Can choose SDA0 & SCLO (default) or GPIO2 & GPIO3
RTC INT: RTC interrupt pin select D16: Use GPIO16 to receive interrupt signal when RTC interruption (default) GL-EN: CM4 powerdown on RTC interruption PI-RUN: CM4 will reboot on RTC interruption
SYSTEM: System function configuration WP-DIS: Prevent EEPROM from being overwritten BT-DIS: Disable Bluetooth function, for CM4 with antenna variant ONLY WIFI-DIS: Disable WiFi function, for CM4 with antenna variant ONLY
Boot ON: CM4 will be booted from USB-C interfaceOFF: CM4 will be booted from eMMC or Micro SD card
PWR & USB When the BOOT switch is "ON", can be used as the USB programming or DC power supply port When the BOOT switch is "OFF", only used as the DC power supply port
HDMI0 HDMI port, supports 4K 30fps output
USB 2x USB 2.0, for connecting sorts of USB devices
ETHERNET0 CM4 original Gigabit RJ45 ETH
ETHERNET1 USB extended 100M ETH
CAM0 & CAM1 2x MIPI CSI camera ports
Buzzer GPIO22 control

FAN 4-pin FAN header, only supports 5V FAN, allows PWM speed adjustment (GPIO18 control, speed measurement is not supported)
RTC battery socket Supports CR1220 button cell
RS485 TX/RX indicator TXn: TX indicator for channel n RXn: RX indicator for channel n
User LED USER0: GPIO20 control USER1: GPIO26 control
PWR Raspberry Pi power indicator
ACT Raspberry Pi working status indicator
DC 7~36V DC power supply interface
Power input terminal DC power supply terminal, supports 7~36V wide range power input
RS485 terminal 4 x Isolated RS485 terminal with a spacing of 5.08mm
Jumper 120R Balance Resistor Selection Jumper
RS485 operating mode selection Full-auto: automatic mode, easy for program operation but the load capacity is weakSemi-auto: semi-automatic mode, which requires manual TX/RX switching, with high reliability and strong load capacity
Encryption chip ATSHA204 encryption chip, providing multiple encryption to ensure data security and reliability
Micro SD card slot for connecting a Micro SD card with pre-burnt image (Lite variant ONLY)

Outline dimensions

What's the differences

CM4 Base Board	Interface count and specifications
CM4 Base Board	PoE	Gigabit ETH	40PIN GPIO	PCIe	USB①	DSI	HDMI	CSI	RTC	Fan Header	Power Input	Features
NANO A			√		2.0×1			×1			5V	CM4 sized
NANO B		×1	√		2.0×1	×1	×1	×1			5V	CM4 sized
NANO C			√		2.0×1	×1	×1	×1			5V	Onboard Camera
mini Base A		×1	√	M.2 M	2.0×4	×1	×2	×2		5V	5V	mini size
mini Base B		×1	√	M.2 M	2.0×4	×1	×2	×2	√	5V	5V	mini size
mini Base C		×1	√	M.2 M	2.0×2		×1	×2	√	5V	5V	Dedicated 40PIN LCD Connector
Touch screen		×1		M.2 M	2.0×4		×1	×1			5V	IPS screen
Mini Dual Gigabit		×2	√		2.0×1					5V SH1.0	5V	dual ETH
Binocular camera		×1	√	M.2 M	2.0×4		×2				5V	dual 8MP cameras
4CH RS485		×1			2.0×2		×1	×2	×1	5V	7-36V	dual ETH
WIFI6 DUAL ETH		×1	√	M.2 E	2.0×3	×1	×2	×2	×1	5/12V	7-36V	WIFI6 dual ETH
Dual Gigabit ETH		×2	√		3.0×3	×1	×2	×2	√	5/12V	7-36V
IoT Dual Gigabit ETH		×2	√		3.0×2	×1	×2	×2	√	5/12V	5V	5G/4G support
IoT Base	√	×1		Gen2×1	2.0×2	×2	×2	×2	√	5/12V	7-36V	5G/4G supportRS232RS485ADC
PoE Base (B)	√	×1	√	Gen2×1	2.0×4	×2	×2	×2	√	5/12V	5V	RS232RS485
PoE UPS Base	√	×1	√	M.2 M	2.0×4	×1	×2	×2	√	5/12V	7-36V	UPS
PoE Base	√	×1	√		3.0×4	×2	×2	×2	√	5/12V	7-36V
Raspberry Pi official	②	×1	√	Gen2×1	2.0×4	×2	×2	×2	√	12V	12V
Wireless base		×1		M.2 B / Mini-PCIe	2.0×3		×1	×1	√	5/12V	5V or 7-36V	5G/4G support RS485 CAN rail-mount
UPS Wireless base		×1		M.2 B	2.0×3		×1	×1	√	5/12V	5V or 7-36V	With UPS 5G/4G support RS485 CAN rail-mount
NAS Mini Computer		×2	√	M.2 M×2/ Mini-PCIe	3.0×2		×2	×2	√		5V	dual M.2 M KEY slots
5″ touch screen	②	×1	√	M.2 M	2.0×4		×1	×2	√	5/12V	5V
7″ all-in-one		×1		M.2 M	2.0×4	used	×1	used	√	5/12V used	7-36V	touch screen camera speaker
13.3″ all-in-one		×1			2.0×2						12V	HD touch screen
13.3″ Magic Mirror		×1			2.0×2						12V	HD screen, Speech Assistant
Note	① USB 3.0 is equivalent to USB 3.2 Gen1 ② There's PoE header only on the Raspberry Pi official IO board without PoE circuit, that means additional PoE module is required for the official IO board to enable PoE feature. Unless otherwise specified, the PoE feature here stands for integrating 802.3af-compliant PoE circuit (5V/2.5A).