PCF8574 I2C 8 Channel SPDT 10 Amp Electromagnetic Power Relay Module, with Direct Control Switches, DIN Rail Mount

Datasheet:
3D STEP file:

FEATURES:
1, PCF8574 I2C 8 Channel SPDT 10 Amp Electromagnetic Power Relay Module, with Direct Control Switches, DIN Rail Mount. Supports control by Raspberry-Pi, Arduino, ESP32, STM32, MCU, DSP, PLC etc.
2, This control interface is based on the NXP PCF8574 IC I2C protocol (not the PCF8574A). Please familiarize yourself with the IC's datasheet before purchasing. If you do not understand how to use the I2C protocol, I suggest you do not purchase it. 
3, By configuring the DIP switches, the PCF8574 I2C device slave address (A0, A1, A2) can be set, thereby supporting up to 8 relay modules. It is also possible to configure whether 4.7kΩ pull-up resistors are required for the I2C SCL and SDA lines. Furthermore, the I2C interface voltage can be configured to either 3.3V or 5V—for instance, the Raspberry Pi I2C operates at 3.3V, whereas the Arduino UNO requires 5V.
4, Each channel has a direct control switch. Even without a controller, the relay can be controlled by these toggle switches. When the switch is set to ON, the relay action. When the switch is set to AUTO, the relay no action. If an external controller is connected, setting the switch to AUTO will accept GPIO control from the external controller.
5, Each channel has a relay status indicator light, and the green PWR indicator light indicates the power supply VCC. This module must be connected to the power supply VCC (DC5V or DC6-36V), otherwise any control will be invalid.
6, Terminal blocks: Pitch 5.0mm/0.197", Wire range 26AWG - 12AWG / 2.5mm square. Rated current 16 Amp. Strip length 7mm. Screws M2.5
7, High quality fireproof nylon material DIN rail mount carrier, can support width 35mm, 32mm or 15mm rail. 
8, Aluminum top cover and laser marking. If you buy in bulk, we can support marking custom logo and other content.
9, UL CE CQC certified terminal blocks. UL 94-V0 certified PCB, and UL CE certified DIN rail mount carrier.

Characteristic Parameters:
Operating Volage: DC5V or DC6 – 36V, only one of the terminals may be selected for connection.
Operating Current:
    7mA / all relay off, 730mA / all relay on, at DC5V
    3mA / all relay off, 270mA / all relay on, at DC12V
    2mA / all relay off, 142mA / all relay on, at DC24V
I2C Interface Voltage: 3.3V or 5V, DIP switch selectable
I2C SCL SDA Pull-up resistor Configuration: Yes or No, DIP switch selectable
Relay Output Switch Contact Rating:
    For AC, Rated voltage 277V. Rated current 10Amp (N/O), 5Amp (N/C)
    For DC, Rated voltage 28V. Rated current 10Amp (N/O), 5Amp (N/C)
Terminal Block:
Pitch 5.0mm/0.197" screw terminal block. 
Wire range 24AWG - 12AWG / 2.5 Square millimeter. Strip length 7mm. 
Screws - M2.5, steel, Cr3+ Zn plated. Pin header and Cage - Brass.