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+--- Forum: Wireless Security (https://www.comfortforums.com/forum-95.html)
+--- Thread: Visonic MCR-308 and MCX-8 Expander (/thread-4681.html)
- caravanboy - 04-26-2017
Hi,
I\'ve nearly finished commissioning my Comfort system. I have used a Visonic MCR-308 receiver for wireless elements - I used Visonic kit years ago, they\'re very reliable and great.
Anyway, I have a Comfort panel and a SEP panel but they\'re not located near to each other and I can\'t easily run extra cables between them and I only have a few spare wires.
The main wireless receiver is connected to the SEP but I\'ve changed plans and need to add more wireless zones. So, I\'ve got a Visonic MCX-8 expander on order. I need to connect the MCR-308 and MCX-8 to each other with 4 wires (for Visonic\'s own bus - 0v, 12v and 2 x data lines). I don\'t have enough spare zones on the SEP so the expander\'s outputs will have to connect to the main Comfort panel.
My query is... am I okay connecting the Open Collector outputs of the expander direct to Comfort zones when the 12v supply on that expander unit is coming from a different power supply? The MCX-8 is powered by the SEP but it\'s outputs will be connected to the zones on the main Comfort panel. All units have the same common/0v so I think I\'m okay, but can anyone confirm?
The attached diagram should make it really clear.
Thanks
- slychiu - 04-26-2017
I beleive this should work since the grounds are common
- caravanboy - 04-26-2017
Great, thanks for the speedy reply.