89 Amended: Sept 21The MPU 424 is designed to accept 4 conventional sounder circuits with a total rating of 3.2A spreadequally over the 4 outputs. This unit takes 1 address on the DF6 system and has its own powersupply and battery backup.Version 2, CSC354CPR has been reduced to 1.6 A loading but is now an approved itemEach individual circuit can have the same programming as a single loop sounder output.The only criteria being that a delay can ONLY be programmed on stage 1 of channel 1,however, version 2 has a jumper to force outputs 2,3 and 4 to follow output 1.MARDF6Because the loop output devices cannot be programmed for fault, the MARDF6 was designed toprovide a fault relay with dry contacts for use with an Autodialler or Redcare that requires a fire andfault signal.This unit connects across the FRE or FPE outputs and the Fault output. The internal 24v supply in thepanel powers the unit.Spur Isolator- MSI850This unit is designed to accommodate a Spur of addressable devices but does not take an addressitself. If the unit is installed at the outset the panel autolearns up to this device autolearns the spur andthen carries on with the remainder of the loop. The spur isolator can also be added after the panel hasbeen autolearned but any devices on the spur MUST be added ONE AT A TIME.If all devices are run off a number of Spur isolators, then one single device MUST be fitted onthe loop between the last isolator and the return run to the panel. (If this is not done then‘Short circuit far’ will be displayed on the panel)Beam Detector MAB50/100RThe reflective beam detector uses one address on the system. Initially the unit is auto learned andthen aligned using the Dill switches on the rear of the unit.The device mode switch is set to run mode by default and the detector will not learn to thepanel if set to any other position.Set the 3-position switch is set to position 1 ‘Prism target Mode’ align to the prism using thethumbscrews. Once the prism has been correctly targeted the prism MUST be covered to ensure thedevice is not receiving reflections from other sources.Set the switch to position 2 ‘Alignment Mode’ and fine-tune the alignment using the thumbscrews.Finally, once fully aligned, set the switch to position 3 ‘Run Mode’ and reset the fire panelRepeatersRepeater panels are Loop connected taking one address in the number sequence.This repeater has functionality limited to sound/silence alarms or reset the system. The internalbuzzer can now be muted from the main panel. The supervisor access code (2214) can be disabledor changed using the engineer menu (2132).The Loop repeater must have the same text downloaded into it as the main panel to which it isconnected. The site installer needs to know what type of repeater is installed, which must be done