PMM840 Loop Power Booster
The PMM840 board provides extra loop power to
an XLM800 loop expansion board, fitted in an MZX
fire alarm control panel.
The PMM840 takes an unused 24 V feed from the
existing power supply and converts this to 40 V for
powering the loop. The PMM840 can provide up to
1.2 A at 40 V.
(The XLM800 does not necessarily need to be
powered by an PMM840. The PMM840 is only required if there is a higher loop power demand on
The PMM840 stacks on top of the existing
PMM800 board. The PMM 840 is based on the
PMM800 board, but with fewer components.