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Visonic MCR-308 and MCX-8 Expander
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 Posted: Wednesday Apr 26th, 2017 08:09 am
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caravanboy
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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

Attachment: Visonic Expander.JPG (Downloaded 16 times)



 Posted: Wednesday Apr 26th, 2017 12:03 pm
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slychiu
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I beleive this should work since the grounds are common



 Posted: Wednesday Apr 26th, 2017 12:17 pm
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caravanboy
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Great, thanks for the speedy reply.



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