SteveInNorCal
Active Member
Hello Coccoon Elk M1G experts. Can you help me figure out the best design to drive an exterior speaker with attached strobe, interior speakers, and interior screamers? The strobe should have different timing and condition logic than the exterior speaker. The interior screamers should have different timing and condition logic than the interior speakers and exterior speaker.
Here’s the design I came up with to drive all four. What do you think? Will this work?
The components:

The approach:
I'm concerned about the RB relay board. It is normally driven from jack J16 on the Elk M1, but I can't use J16 to drive the RB because I have to use it to drive the TWA via its jack J4.
But the TWA DOES have a pass-through from J4 to J3 to expand the bus. Can I successfully daisy-chain the TWA to the RB relay board by connecting J3 on TWA to J1 on RB? If I daisy-chain, can I address the RB correctly through the TWA?
Is there any other way for an RB to co-exist with a TWA on the Elk M1G?
[sharedmedia=gallery:images:711]
[sharedmedia=gallery:images:712]
NOTE: I cross-posted this from Forum "Home Automation/Microcontrollers" which doesn't seem to have much traffic. I want to delete it there and keep it here.
Thanks in advance,
Steve
Here’s the design I came up with to drive all four. What do you think? Will this work?
The components:
- 1 x Elk 1RT Outdoor Speaker (exterior on garage)
- 1 x Elk SL1 Strobe (attached to 1RT) (exterior on garage)
- 3 x Elk TWSF Flush Mount Speaker/Microphone (interior)
- 1 x Elk RB Relay Board (main can with M1)
- 1 x Elk TWA Amplified Two Way Listen In Interface (main can with M1)
- 5 x Moose/Sentrol/Interlogix MPI-47E Piezo Screamer Sirens (interior)
- 1 x Altronix eFlow4NX auxiliary power supply with Elk 1280 battery.
- Elk: 1.3 A Peak, 52% of rating. Powers the Elk M1 chassis; M1KP2 keypad; M1XIN 16 zone expander; M1XSP serial expander for Uplink radio; 1RT speaker; SL1 strobe; M1PCSPIM UPB Interface; 3 x Bosch ISC-BDL2-WP12G Blue Line.
- Altronix: 2.6 A Peak, 65% of rating. Powers the M1XRWTW wireless transceiver; M1TWA; M1XEP ethernet interface; glass breaks; screamers; Uplink 4500ez.

The approach:
- Output 1 is unused. The TWA drives the speakers instead of Output 1.
- Output 2 drives Elk 1RT Speaker
- Output 3 (dry contact relay) drives Elk SL1 Strobe with power from Elk VAUX.
- Relay Board, Relay 1 NO contact drives Screamers with power from Altronix aux supply.
- Interior speakers and microphones are driven from the TWA Amplified Two-Way Listen In Interface.
I'm concerned about the RB relay board. It is normally driven from jack J16 on the Elk M1, but I can't use J16 to drive the RB because I have to use it to drive the TWA via its jack J4.
But the TWA DOES have a pass-through from J4 to J3 to expand the bus. Can I successfully daisy-chain the TWA to the RB relay board by connecting J3 on TWA to J1 on RB? If I daisy-chain, can I address the RB correctly through the TWA?
Is there any other way for an RB to co-exist with a TWA on the Elk M1G?
[sharedmedia=gallery:images:711]
[sharedmedia=gallery:images:712]
NOTE: I cross-posted this from Forum "Home Automation/Microcontrollers" which doesn't seem to have much traffic. I want to delete it there and keep it here.
Thanks in advance,
Steve