Figure 18: Slot for Expansion Board Attachment
When adding an expansion board to the expansion slot of the AC-825IP panel, make sure the power to the
control panel is off.
The system can support up to 12 expansion boards via OSDP.
Each ME-1515 is self-powered.
Use a daisy chain connection when multiple expansions are needed.
3.6.1. Daisy Chain System
OSDP peripheral devices such as expansion boards and readers must be connected to the AC-825IP in a daisy chain
wiring scheme in which multiple devices are wired together in sequence or in a ring.
Figure 19: Daisy Chain Setup shows an example daisy chain setup for a network of one AC-825IP access control
panel plus 6 expansion boards using four ME-1515 enclosures. The same connectivity is applicable also for OSDP
readers.
AC-825IP Installation & User Guide
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