150963 3-1
Section 3
Access Control Installation and Operation
This section of the manual describes the installation of access control hardware manufactured
by Silent Knight and applies to the 4821 control panel only. Section 4 of this manual describes
installation of other required or optional hardware devices.
3.1 Model 4421 Installation
Figure 3-1 shows the layout of the 4421 board. Table 3-1 (next page) is a terminal strip
description.
Figure 3-1 Model 4421 Board Layout
IMPORTANT!
All circuits are power limited, Class II.
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