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Document: LT0273 MX4428 MXP Engineering / Technical Manual
Device Information and Programming
Issue 1.5 24 March 2006 Page 3-19
3.9 814PH PHOTOELECTRIC SMOKE & HEAT
DETECTOR & 814P PHOTOELECTRIC SMOKE
ONLY DETECTOR
3.9.1 GENERAL
The 814PH is a photoelectric smoke detector which also includes a temperature sensor. The
detector senses the amount of smoke present and the temperature and sends these values
to the MXP. The MXP makes any decisions as to whether this is an alarm, fault, normal or
whatever, based on the smoke level, temperature, or rate of rise of temperature, and/or a
combination of these. The integral LED is turned on by the MXP when an alarm is detected.
Refer to the specifications of the 814H for more details on the heat sensing element of the
814PH.
The 814P is the same as the 814PH, except that it has no
temperature sensor.
The remote LED and functional base outputs are programmable for their functionality (refer
to section
3.3).
3.9.2 814PH & 814P SPECIFICATIONS
Line Connections L(–), L1(+)
Supply Voltage 20Vdc - 40Vdc
Supply Current 275uA (typical quiescent)
Alarm Current 3.0mA (typical)
Remote LED Current 7mA (Tyco E500Mk2)
Dimensions 110mm (diameter) x 55mm (including MUB base)
Weight 76g
Base MUB, 5B, 5BI, 814RB, 814SB, or MkII Sounder Base
3.9.3 MX4428 PROGRAMMING OPTIONS - 814PH/814P
In the MX4428 programming there are two different device types that use the 814PH/814P
detector. Type 16 814PH is used when the 814PH is used with the SmartSense algorithm
and type 27 814PHFL is used when the FastLogic algorithm is required. These different
device types allow the MX4428 to have separate sensitivity settings for the algorithms and
for the sensitivities to be displayed correctly.
However, the mode value actually defines to the MXP which algorithm is to be used.
Mode values 0 – 7 must only be used with a device type of 814PH, and mode values 8 – 15
must only be used with a device type of 814PHFL. Do not use an incorrect mode, as the
values displayed at the MX4428 will not match those being used or generated at the MXP.
The 814P must be programmed as an 814PH, with no heat. I.e. only modes 7 and 13 are
allowed. The MX4428 will display the point type as 814PH.
The programmable values for the 814PH and 814P are described in the following tables.