Nexus 21 A1557 technical specifications Operation and is

Device type	Type	Condition	Panel response	Analogue Value	Status bits	Output bits		Default cause	Comments
	Code				(210)			and effect
XP95 heat	6	Quiescent	None	AV = 8 to 44	Echo	0	= remote LED	Bit 0 and bit 2	See note 1.
detector high		Fire	Fire	AV = 55 to 127	output bits	1	= self test	set when device
		Alert	Alert	AV = 45 to 54		2	= LED	is in fire
		Fault	Data fault	AV = 0 to 7
Series 90	7	Quiescent	None	AV = 16	L10	0	= remote LED	Bit 2 set when	Input bit 2
callpoint/		Alarm	Fire	AV = 64	L01	1	= self test	in fire	confirms LED
callpoint monitor		Fault	Fault	AV = 4	L10	2	= LED		operation and is
									represented by L
XP95 callpoint	7	Quiescent	None	AV = 16	L10	0	= remote LED	Bit 2 set when	Input bit 2
		Alarm	Fire	AV = 64	L01	1	= self test	in fire	confirms LED
		Fault	Fault	AV = 4	L10	2	= LED		operation
XP95 Mini	7	Quiescent	None	AV = 16	L10	0	= remote LED	Bit 2 set when	Input bit 2
switch monitor		Alarm	Fire	AV = 64	L01	1	= self test	in fire	confirms LED
with interrupt		Fault	Fault	AV = 4	L10	2	= LED		operation
XP95 USA mini	7	Quiescent	None	AV = 16	L10	0	= remote LED	Bit 2 set when	Input bit 2
priority switch		Alarm	Fire	AV = 64	L01	1	= self test	in fire	confirms LED
monitor		Fault	Fault	AV = 4	L10	2	= LED		operation

Notes:

The analogue thresholds for analogue detectors can be changed for both fire and alert. See the installation and commissioning manual for details.

On the S90 3-way analogue unit, either the analogue value or logic inputs can raise alarms. The analogue thresholds can also be changed for fire and alert on this device. See the installation and commissioning manual for details.

The number of devices with LEDs operated is limited to eight per loop.

If a device has more than one condition active then only the highest level event will be reported although lower level alarms may be present on the display. For example, if a smoke detector enters an alert condition this will be indicated on the panel. If the device subsequently enters a fire condition the alert will clear but the alert LED will become steady to indicate the event occurred.

Document Ref: Nex8inst.doc/Rev0 09.07.00 Page 30 of 30 Originator MC Checked by AC__