Name: Relay Modular Module
Type: Adpater Board
Version: 1.0.0
Author: Dubravko Penezic
Copyright: Creative Commons BY-NC-SA v 3.0
Implemented function:

• Selectable power source on both side
• Selectable polarity on both side
• LED signaling
• Transistor for transforming digital signal for control relay
• Multi connection solution

PCB Top & Bottom image:

Schematic: