SILENT KNIGHT 4821 Manuel d'installation Page 79

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Control Panel Description and Installation
150964 4-35
4.22 DACT Compliant Wiring
The following sections contain diagrams and information necessary for installations to com-
ply with UL 864 and NFPA 72 (Chapter 4) fire alarm systems for central station services.
4.22.1 Trouble Output Relay
A trouble output relay for each power supply, must be connected to a zone input on the 4821/
4820 Control Panel (see Figure 4-26). The “Zone Type” should be selected as Tamper and the
response characteristics as follows:
Figure 4-26 Wiring Diagram For a Power Supply Trouble Fault Relay
Table 4-7: Trouble Output Relay Response Characteristics
Disarmed Response Armed Response
Short
Trouble Trouble
EOL
Ready Ready
Open
Trouble Trouble
Model 7628
EOL Resistor
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