
Access Control Installation and Operation
150963 3-3
3.1.1 Model 4421 Connection to the 4821
The 4421 Interface connects to the 4821 panel via the SBUS. Connect the 4421 to the panel as
shown in Figure 3-2. See Section 4 for complete information about SBUS device connections.
Figure 3-2 Wiring Diagram 4421of N to the Control Panel
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