20 REFERENCE & INSTALLATION MANUAL
5.7 ZONE DOUBLING (ATZ)
SECTION [504]: OPTION [8]
Enabling the ATZ feature allows you to install two detection
devices per hardwired input terminal. Each detection device will
have its own zone, display its zone status on the keypad and send
separate alarm codes for each zone. The extra zones are
recognized as described in Figure 5-5. For information on how to
connect the detection devices, please refer to Double Zone
Connections in section 3.12. Please note that Fire Zones cannot be
doubled.
Figure 5-5: ATZ Input Terminal Recognition
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