Programming 15088:K 3/21/01
3-17
Optional Latching for More Devices
• The control panel will latch up to 99 devices, subject to the limitations outlined below.
• All devices in the system must be of the R4 variety (see below).
• No RA-400 Remote LEDs can be installed on any device, excluding the DHX-501 Duct Detectors.
• Due to a finite amount of 24 VDC power available for devices on each SLC Loop, illumination of only
a certain quantity of LEDs will actually be visible under conditions where large numbers of LEDs have
been latched on. Note that remote LEDs off of DHX-501 Duct Detectors will always illuminate since they
are powered from a source other than the SLC Loop.
• Under primary (AC) power, 99 devices can be latched.
• Detectors have priority over modules. After 99 devices have been latched, detectors that come into
alarm will assume LED-latch priority over previously-latched module LEDs.
• Under secondary (DC) power, only intelligent detectors (including DHX-501 Duct Detectors) will be
latched.
• Due to a finite amount of 24 VDC power available for devices on each SLC Loop, illumination of only a certain quantity
of LEDs will actually be visible under conditions where large numbers of LEDs have been latched on. Note that
remote LEDs off of DHX-501 Duct Detectors will always illuminate since they are powered from a source other than
the SLC Loop.
MORE LED latching can only be employed if
ALL
installed addressable
devices were purchased from the Notifier factory after April 1, 1991.
Use of this feature under any other circumstances can cause the SLC
Loops to shut down. Devices compatible with more LED latching will
have the code R4 stamped on the product marking label. SDX-551/751
Photoelectric detectors can also have an H code after the model number.
NOTES
• Modules refer to monitor and control modules, and XP Transponder circuits. Devices are defined as
intelligent detectors and modules.
• Software Type IDs PWRC, NCMN, SCON and NOA will never latch under Default Latching.
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