To integrate your existing ButterflyMX video intercom system with Openpath(Not the Avigilon Alta Video Intercom Reader Pro) with Avigilon Alta, connect a dry contact relay from each intercom touchscreen to a REX input on the Openpath Avigilon Alta ACU. Twisted pair wiring is recommended. For new installations, note that 18 AWG wire is recommended for ButterflyMX power connections.
Additionally, you can wire a REX sensor in parallel with the intercom (figure figures 1 and 2) or directly to your locking hardware (figure 2figures 3 and 4), depending on the door location and building code requirements.
Option 1: Wiring REX in parallel with the intercom
Figure 1: Wiring ButterflyMX intercom with optional in-parallel REX to 4-Door Controller
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Figure 2: Wiring intercom with optional in-parallel REX to 4-Door Controller.
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Option 2: Wiring REX to locking hardware
Figure 3: Wiring ButterflyMX intercom with optional REX to mag lock on 4-Door Controller
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Figure 4: Wiring intercom with optional REX to mag lock on 4-Door Controller.
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Note on using ButterflyMX the intercom for access:
If you plan on using the
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intercom’s card reader for access (without an
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Avigilon Alta Smart Reader), run the W0, W1, and GND signals from the
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intercom to a Wiegand input on the 4-Door Controller or any I/O pair on the 4-Port, 8-Port, or 16 I/O Elevator Board. The
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intercom power supply and the ACU power supply should share a common ground. See How to wire Wiegand devices to Core Series hardware.
If you are installing an
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Avigilon Alta Smart Reader at the same entry as the
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intercom, connect the Wiegand W0 and W1 signals from the
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intercom directly to the WD0 (Green) and WD1 (White) wires on the Smart Reader pigtail.
The REX signal can also pass back to the ACU in the same cable bundle as the Smart Reader wires if there is a spare twisted pair available. Run power for the
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intercom separately, since it
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may require heavier gauge wires.
Additional resources