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🔌General Home Automation => Automating Your House => Troubleshooting Automation Problems => Topic started by: vantech on October 18, 2010, 08:50:33 PM

Title: ms14a and TM751
Post by: vantech on October 18, 2010, 08:50:33 PM

hey guys,

Does each ms14a need a separate tm751 or can you use the same one for multiple ms14a's


Thanks in advance,
Jeff van tassel    >!

Title: Re: ms14a and TM751
Post by: HA Dave on October 18, 2010, 09:21:24 PM

Quote from: vantech on October 18, 2010, 08:50:33 PM

Does each ms14a need a separate tm751 or can you use the same one for multiple ms14a's

The TM751 can transceive the RF signal to a PLC (Power Line Command) for ANY number of MS14A.... as long as the PLC's are all on the same house code/address (the letter). But the TM751 does transceive all 16 of the unit (number) addresses.

Title: Re: ms14a and TM751
Post by: vantech on October 18, 2010, 09:24:59 PM

So then basically i can have 16 ms14a's on one tm751  >!   Great Thanks..... :)       -:)

Title: Re: ms14a and TM751
Post by: HA Dave on October 18, 2010, 09:34:21 PM

Quote from: vantech on October 18, 2010, 09:24:59 PM

So then basically i can have 16 ms14a's on one tm751  >!   Great Thanks..... :)       -:)

Well.... if the purpose of the MS14A's was to turn on a light... or chime a chime. And the address of the light(s) and chime(s) was the same.... you could have as many of the motion sensors as you could crowd into range of the TM751.

Title: Re: ms14a and TM751
Post by: Brian H on October 19, 2010, 06:15:54 AM

No more like 8 if you don't want the Dusk Dawn sensor in the motion sensor to step on an adjacent address.
The MS14A has a dusk dawn sensor in it. It sends an on at dusk and a off at dawn. uses the next highest unit code for this function.
So motion on M1 would send an on at dusk and an off at dawn on M2.

Also the unit one address will also turn the TM751 on and off.

Title: Re: ms14a and TM751
Post by: HA Dave on October 19, 2010, 10:25:56 AM

Quote from: Brian H on October 19, 2010, 06:15:54 AM

No more like 8 if you don't want the Dusk Dawn sensor in the motion sensor to step on an adjacent address.

Well.... maybe I wasn't real clear.

If the goal is to monitor an area and then be warned by a light or chime (or even an email or cell phone text). A user could plaster an area with motion sensors.... all set to the same address. The TM751 doesn't see individual units... it just receives the RF signal. So any number of sensors could be used... using the same House/Unit address.

A completely different thread:  Of course... that pesky dusk-dawn sensor does need to be considered. I open the sensors and tape over the photocell (I don't use the dusk-dawn from those sensors). I use one PR511 dusk-dawn sensor... and build that sensors signal into my macros.

Title: Re: ms14a and TM751
Post by: Brian H on October 19, 2010, 11:04:24 AM

Or I may have read it incorrectly.
16 different unit codes could be a problem.
Unlimited ones on the same unit code could be possible, but I would think at some point. They would step on each others signals if more than one tripped at the same time.

Title: Re: ms14a and TM751
Post by: HA Dave on October 19, 2010, 12:05:34 PM

Quote from: Brian H on October 19, 2010, 11:04:24 AM

..... I would think at some point. They would step on each others signals if more than one tripped at the same time.

True.... likely they would.
I just thought... based on the OP's question.. he was thinking in linear terms. [Does each ms14a need a separate tm751 or can you use the same one for multiple ms14a's] And I was trying to point out that the TM751 could not only handle multiple sensors... but also that multiple sensors could use the same H/U address.