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Document: LT0273 MX4428 MXP Engineering / Technical Manual
Device Information and Programming
Issue 1.5 24 March 2006 Page 3-31
3.15 MKII SOUNDER BASE
3.15.1 GENERAL
The MkII Sounder Base is a range of detector bases which are designed as low cost warning
devices, some of which are loop powered and others are externally powered. The sounder is
controlled by the detector which is plugged into the base, but the operation of the sounder
can be quite separate from the operation of the detector. (Refer to section
3.3.)
The MkII Sounder Bases cannot be plugged into other bases. They must be mounted
directly on the ceiling or wall.
At the time of writing, the MkII Sounder Bases are not SSL approved to AS4428. However
they may be used for supplementary local sounders.
3.15.2 SPECIFICATIONS
Line Connections L(–), L1(+)
Remote LED Connection R(–), L1(+)
Supply Voltage 20Vdc - 40Vdc
Quiescent Supply Current 200uA (ex MX loop)
Dimensions 110mm (diameter) x 37mm (excluding detector)
Weight 186g
802SB 901SB 812SB 912SB
Power Source Loop 24VDC Loop 24VDC
Adjustable volume Yes No
Volume 68-90dBA 100dBA
Minimum Volume Current
Consumption
1.2mA (loop) 1.2mA (ext
supply)
N/A
Maximum Volume Current
Consumption
6.8mA (loop) 6.8mA (ext
supply)
21mA (loop) 21mA (ext
Supply)
Tone 1 Dutch Slow Sweep (AS2220 Evacuate)
Tone 2 Temporal 4
Tone 3 Slow Sweep
Tone 4 March Time Beep
Tone 5 Fast Sweep
Tone 6 Temporal 3 (ISO8201 Evacuate)
Tone 7 Alternating
Tone 8 Continuous
3.15.3 WIRING
Wiring for the 802SB and 812SB is the same as the MUB, refer to Figure 3.1. The 901SB
and 912SB wiring is similar, but they also require a 24V connection. Refer to the installation
sheet supplied with these bases.
For the 901SB and 912SB, it is recommended that the external supply covers only one zone,
or the power wiring be arranged so that an open circuit in the power feed cannot affect more
than one zone. A loop arrangement with supervision and a reverse-feed relay can be used to
achieve this - refer to Product Bulletin PBF0200.