Elk 150RT & SL1

[Hightower]

Longtime reader here.  I've searched topics but haven't been able to find an answer so decided to register and ask it
 
First, as I understand it:

• The Elk M1 Gold "Output 2" is 1.0A
• The 150RT draws 1.2A
• The SL1 draws 210mA
• "Millimiser" wiring reduces the draw of the 150RT to 700mA

Questions:

1. Does this mean that I have to use millimiser wiring to run the 150RT off of output 2?
2. The 150RT is rated at 118db.  How much does millimiser reduce the volume?
3. If I run the millimiser wiring, can I run the SL1 off of output 2 as well (700mA + 210mA < 1.0A)?
4. If so, do I run them in parallel or series?

I know folks will recommend that the SL1 be run seperately so that it can continue flashing until the alarm is disabled, and I may do that long term, but for now I'm hoping to run them off of the same circuit without an external power source (if that's possible.)
 
Thanks to all for the great information you've shared over the years.  This is a great site!

 

[Azcrum]

What is your millimiser wiring please. Can't find anything on this other than how-to's on how to reduce amperage. but not being an electrical guy, do not know what i'll be doing for sure.
Thanks

 

[RAL]

What is your millimiser wiring please. Can't find anything on this other than how-to's on how to reduce amperage. but not being an electrical guy, do not know what i'll be doing for sure.
Thanks

 
The instructions for older 150RT's (circa 2002) gave the procedure below for reducing the current draw.  The latest instructions have dropped all mention of "millimiser mode" so it's possible that the siren driver changed and can't be modified as the old one was.
 
MILLIMISER NOTE:
The Siren is factory set for maximum loudness and current draw.  To
change the unit for lower current draw and loudness, remove the four screws
and cover from the back of the siren. Find the Red speaker wire and follow it
to where it solders to the circuit board. Cut this Red wire approx. 3" back from
the board.  Find the unused Yellow wire that is soldered to the circuit board.
Using the provided wire nut, splice the Red wire from the speaker to the
Yellow wire going to the board.

 

[Azcrum]

wow! would have never guessed. Thank you for this... very much appreciated !!!