2.1mm Power Jack 12V DC (Center Positive) 500ma 5VDC Switcher ...

I/O Connectors

GND GP7

GP6

GND GP5 GP4

GND GP3 GP2

Relay Status LEDs

Arduino Nano Port

GND

SPST Relay Port

+5V 400ma

I²C Output to Next Device

SDA SCL

12V DC Power Connector

2.1mm Power Jack 12V DC (Center Positive)

Power LED

Address Jumper

500ma 5VDC Switcher Power Supply

CONNECTOR PINOUTS FOR 30A SPST RELAY Relay Warranty Rating: 30A@250VAC 30A@30VDC Coil: 12VDC