55
Version 17
Safe-E-
Stop™
User Guide
12.2 MSD Maintenance
The MSD must remain in good physical condition and must be operated within its specified limits. The enclosure it
is mounted within must be rated for the environment and the inside of this enclosure kept free of condensation.
Cable and conduit entry points must be kept in good condition.
If the MSD is damaged or faulty, return it to Cattron or an authorized service agent for repair.
If the enclosure housing the MSD is damaged, it should be repaired to prevent damage to the MSD.
The MSD should not need cleaning if it has been installed in a secondary enclosure according to this manual.
Dust may be removed with a dry cloth or by the use of a light air jet or vacuum.
If the MSD fails to power on (No LEDs or display), verify that the incoming supply is correct on the 24V incoming
connector first. If this is correct there should be 24Vdc between P4 terminals 7+8 and 9+10. If missing, F3
adjacent to the incoming power terminal may be faulty. As the MSD may have more than one source of power on
its terminals, isolate if necessary. After removing power from the MSD, F3 can be removed by carefully pulling the
fuse straight out using tweezers or needle nose pliers. Replacement is the reverse of the removal procedure. F3
is a 1.5A, 125V slow blow ceramic fuse, Cattron part number PRT-0001852.
No further maintenance of the MSD is possible.
12.3 Spare MSD
A configured spare MSD may be included in an installation for rapid recovery in case of a problem, if so, it is
critical that only one MSD can be powered at any time, this could be achieved with a power change over Key-
switch.
The outputs and reset inputs can normally be wired in parallel.
Note that the Antenna system will also either need to be duplicated on the spare, or the coaxial cable switched to
the operating unit.