MSA SUPREMATouch - Page 91

SUPREMATouch
90
Maintenance and Service
MSA
US
- The presetting of the MAI module [Chapter 11.3] must be performed again.
- The type of MPI must correspond to the type of connected sensor [→ Installation and Start-Up
Guide].
NOTE: When replacing MPI modules, always electrically separate the connected sensor to pre-
vent damage as a result of uncompensated sensor current.
When replacing MCI modules, it is not necessary to repeat the adjustment steps, but it is neces-
sary to make sure that the modules are configured correctly [→ Installation and Start-Up Guide].
Replacement of the MGO Module
It is necessary to turn off the system to replace the MGO module. To prevent alarms and malfunc-
tion messages, the relays must be inhibited directly on the MRC TS module [→ Installation and
Start-Up Guide].
Replacement of the MAO Module
It is necessary to turn off the system to replace the MAO module. The failure message can be pre-
vented from being sent any farther by inhibiting the relays on the MST module [MRO-8 module]
or on the MRC TS module [MRO 8 TS module] [→ Installation and Start-Up Guide].
Replacement of the MBC Module
It is necessary to turn off the system to replace the MBC module. To prevent alarms and malfunc-
tion messages, the relays must be inhibited directly on the MRC TS module [→ Installation and
Start-Up Guide].
Connection Modules
Replacement of MAT/MAT TS, MUT, and MGT 40 TS Modules
These modules can be replaced without turning off the system, although the function in question
[sensor input, relay driver or analogue output] is not available during the replacement.
When the modules which implement sensor connections are replaced, the assigned measure
points must be locked to prevent alarms or failure messages [→ Installation and Start-Up Guide].
When it is necessary to replace a MUT module to which an MRC TS module is connected, the
connected relays can be locked by using the LOCR connection on the MRC TS module, provided
that the MRC TS module has a voltage supply separate from the system [→ Installation and Start-
Up Guide]
Replacement of MRO 8/MRO 8 TS Modules
It is not necessary to turn off the system to replace MRO 8/MRO 8 TS modules. Alarm devices
which are connected to the modules must be deactivated, however [especially when the relays
are operating Normally energised].