MSA SUPREMA - Reset Terminal (Reset Latching Alarms); Acknowledge Terminal (Reset Horn Relay); LOCR Terminal; Password Terminal

REV 0, June 2005Page 154
Operation Manual SUPREMA
5. Installation
5.10.5 Reset Terminal (Reset Latching Alarms)
Latching alarms can be released via terminals 7 and 8 by closing a contact (key, etc.) (same
function as the RESET key on the front panel).
MST Terminal 8 : RES
MST Terminal 7 : GND
5.10.6 Acknowledge Terminal (Reset Horn Relay)
The horn relay can be reset via terminals 5 and 6 by closing a contact (key, etc.) (same function
as the ACKNL key on the front panel).
MST Terminal 6 : HACK
MST Terminal 5 : GND
5.10.7 LOCR Terminal
The relay inhibit for the MRO-8 module (common alarms) on the rear of the rack can be activated
via terminals 3 and 4 by closing a contact (key, etc.). All 8 modules are inhibited as a block.
This terminal has no effect on the MRO-8-TS modules. These modules are inhibited via the
LOCK terminal on the MRC-TS module
(see section 5.7.2.1 Relay Inhibit).
MST Terminal 4 : LOCR
MST Terminal 3 : GND
Note: If the voltage supply for the MIB module is interrupted, the inhibiting
function of the MRO-8 modules is no longer active.
5.10.8 Password Terminal
The password input can be replaced via terminals 1 and 2 by closing a contact (key switch). If
the current password has been forgotten, this terminal can be used to enter a new password
(see section 7.5 Changing the password).
MST Terminal 2 : PSW
MST Terminal 1 : GND
5.11 Connection for the System Power Supply
Before beginning installation, make sure that section 3.7 System Power Supply , has been
read and understood. Care must also be taken to ensure that the complete system, including
the sensors and relay modules, does not exceed the maximum load of the selected supply
voltage. If an external power supply or a battery is used, the supply voltages must operated via
an appropriate EMC filter. The requirements of the EMC and Low Voltage Directive must be
complied with.
5.11.1 Calculation of the Required Power Supply
The power consumption for supplying the sensors is based on the number and types of
connected sensors and on the resistance of the cables used.