SILENT KNIGHT 4821 - 4205 Touchpad Connection to 4421

Model 4821/4820 Control/Communicator Installation Manual
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3.1.2 4205 Touchpad Connection to 4421
The 4205 Access Control Touchpad is connected to the 4421 as shown in Figure 3-3.
Figure 3-3 Model 4421 to 4205 Connection
Note: The Model 4205 is not UL listed for access control.