TrojanHorse
Active Member
So I’ve been confused on the details of adding a supplementary power supply. As I’ve been exploring this and searching the forums I think I found most of my answers, but I would greatly appreciate if the community can chime in and give me a sanity check.
I ran the ELK power consumption spreadsheet and it says that I’m over the 1 amp limit so I plan to add an additional power supply. I’m surprised by this fact and didn’t expect it when I began since my install doesn’t seem that big (see list below), but regardless, I’ve ordered the ELK P212S and plan to install it in the enclosure. This should give me some headroom as well as I continue to find new things I want to incorporate into my system. In my case, the spreadsheet shows I’m drawing about 2.6 amps including the speaker and siren, and 1.6 excluding (and the keypad menu shows that standby is drawing about 0.5 amps).
First, I’d appreciate help with sizing. Appendix F of the installation manual says that the 1 amp limit for the M1G is for +SAUX, +VAUX, +VKP AND J16.
Second, I have the following questions on the install:
Third (and maybe OT), this is going to force me to re-wire my enclosure, which I want to do the right way.
Thanks in advance guys.
ELK System components:
ELK M1G
M1XEP
M1RB
M1DBH
1 M1XRFTW wireless expander
3 of M1KP2 keypads
3 of Bosch BDL2-WP12G motion sensors
6 of COSMO2W (smoke / CO)
1 of COSMOD2W
Ipdatatell cell dialer
S73 speaker
S15 siren
Glass break detector
I ran the ELK power consumption spreadsheet and it says that I’m over the 1 amp limit so I plan to add an additional power supply. I’m surprised by this fact and didn’t expect it when I began since my install doesn’t seem that big (see list below), but regardless, I’ve ordered the ELK P212S and plan to install it in the enclosure. This should give me some headroom as well as I continue to find new things I want to incorporate into my system. In my case, the spreadsheet shows I’m drawing about 2.6 amps including the speaker and siren, and 1.6 excluding (and the keypad menu shows that standby is drawing about 0.5 amps).
First, I’d appreciate help with sizing. Appendix F of the installation manual says that the 1 amp limit for the M1G is for +SAUX, +VAUX, +VKP AND J16.
- Can someone confirm if this means that if I run a speaker (ELK 73) on output 1 and a siren on output 2 (ELK 15) that the draw of those components does not count toward the 1 amp limit? Page 7 of the manual and a response by Spanky in another thread suggests that’s the case. (http://cocoontech.com/forums/topic/9373-confused-about-speakerssirens-and-ul-listed/).
- As an aside, is this in part the reason why the M1G kit came with a 45VA 16.5 VAC transformer (ELK TRG-1640) that can power ~2.7 amps?
Second, I have the following questions on the install:
- I am going to add a battery to the P212S – can / should this be connected in parallel with the battery I already have for the M1G, or do I keep them separate (and deal with the different standby times)?
- I plan to shed almost everything to the P212S and use the M1G only for SAUX and siren / speaker outputs (edit: and M1RB) – does that make sense?
- Back to my first comment on sizing, do people typically include the sirens and speakers in current draw / standby time calculations?
- What battery size(s) would you recommend? Elk’s power spreadsheet (including sirens) suggests the 12Ah battery for the entire system – am I correct to assume that the M1G or P212S can adequately charge that battery?
- I plan to put this into the large enclosure with the M1G. Is there a single transformer I could use or do I need to use 2?
- What’s the best way to have the main power switch on the M1G control the P212S so that if I turn off/on the main power switch on M1G the P212S will do the same? (not essential but might be nice)
Third (and maybe OT), this is going to force me to re-wire my enclosure, which I want to do the right way.
- Can someone please point me to a resource of “best practices” when wiring in an enclosure?
- I’ve seen pictures posted to FB by ELK and some posts here that give me guidance, but I’m wondering things like how long of a service loop to leave, the best way to manage the service loops, etc. I’ve read the “wiring your new house” 101-103, which is helpful but doesn’t talk much about the enclosure itself. I’ve also watched a structured wiring video from ELK on youtube that didn’t give me quite the detail I wanted. I can start a new thread on this (and maybe post pictures) but was wondering if there’s a resource someone can point me to before I ask for specific suggestions on cleaning up my particular install.
Thanks in advance guys.
ELK System components:
ELK M1G
M1XEP
M1RB
M1DBH
1 M1XRFTW wireless expander
3 of M1KP2 keypads
3 of Bosch BDL2-WP12G motion sensors
6 of COSMO2W (smoke / CO)
1 of COSMOD2W
Ipdatatell cell dialer
S73 speaker
S15 siren
Glass break detector