REV 0, June 2005 Page 139
Operation Manual SUPREMA
5. Installation
Note: To ensure a save relay contact operation the relay output must be fused to
get a overload protection. To calculate the fuse rating, multiply the maximal
allowed nominal current by factor 0,6.
5.7.1 MRO-8 Module Relay Output Unit Common Alarms
This module is used only when relays are required for common alarms and installation is to be
done directly on the rack. The module offers 8 common alarm relays and can be plugged
directly into the rear of the rack. Each relay has a changeover contact, which is connected to
terminals. The common alarm relays can be inhibited by connecting a switch to the LOCR
contact of the MST module
(see section 5.10.7 LOCR Terminal). As standard practice, the
common alarm relays are normally energised (i.e. a relay is energised – no alarm. The relay is
de-energised when an alarm is triggered at one or more inputs.).
Note: The MRO-8 module must be installed in POS 9 only! It is impossible to be
use more than one MRO-8 module in one rack.
MRO-8 Module Relay Assignment
Relay No. Assignment
11st Alarm
2 2nd Alarm
33rd Alarm
4 4th Alarm
5 Signal Failure (Sensor)
6Horn
7 Inhibit
8 Power Supply Failure
Table 5-24: MRO-8-Module, Relay Assignment
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