AC-425 Panel Setup
AC-425 Hardware Installation and User Manual 19
Figure 8: Reader Wiring
3.7 MD-IO84
The MD-IO84 is an optional I/O expansion board that adds 4 relay outputs and
8 supervised inputs to the Access Control Panel. Attach the MD-IO84 to the
AC-425's expansion slot, as marked in red in Figure 9). For more information,
see the MD-IO84 Installation and User Guide.
3.8 MD-D04
The MD-D04 is an optional reader expansion board that adds 4 readers, 4 relay
outputs and 4 supervised inputs to the Access Control Panel. Attach the MD-
D04 to the AC-425's expansion slot, as marked in red in Figure 9. For more
information, see the MD-D04 Installation and User Guide.
Figure 9: Connector Location for MD-IO84 or MD-D04 Expansions
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