Switching Relays

Switching Relay - 8
- How can I tell if the Switching Relay 8 is the new and improved version?
Switching Relay - 4
- How can I tell if the Switching Relay 4 is the new improved version?
- How do I update the firmware if the firmware is 3.6.2 or older? (Only relevant for products bought before August 2015)
Switching Relay - 1
- Switching Relay - Sharing the power supply with a control system
- How do I control the Switching Relay - 1?