REV 0, June 2005Page 156
Operation Manual SUPREMA
5. Installation
5.11.2 Connection of the DC-Voltage Supply (MIB Module)
The system is supplied with 24 VDC (19.2 ... 32 VDC). There are 3 pairs of connection terminals
on the MIB module, so that the supply can originate from 3 different sources (redundancy). The
supplies are functionally equivalent, but the order in which the power is drawn is prioritised: 1
st
= EXT, 2
nd
= INT, 3
rd
= BAT. The changeover from one power source to another is accomplished
on the system modules.
Warning: The input voltage range (19.2 … 32 VDC) must not be exceeded! Higher
voltage values can lead to the destruction of the unit!
Figure 5-45: MIB module, supply voltage terminals
When an external power supply or a battery is used, the supply voltages must be
operated via an appropriate EMC filter. The requirements of the EMC and Low
Voltage Directive must be complied with. The external power supply must be a
SELV, limited energy source.
EXT Connection (External Power Supply Unit, 24 VDC)
• Connection for external power to supply all assemblies of a rack.
• Required when a redundant power supply is to be provided or when the internal rack
power supply unit is unable to supply all the sensors.
• Maximum supply current of 20 A for one rack.
INT Connection (Rack Power Supply Unit, 24 VDC, 150 Watts)
• Connection for an internal rack power supply or an external power supply.
• Power supplied to all the rack units and sensors.
• If the rack power supply cannot supply sufficient current, the sensors, module cards or
relays must be supplied by external units.
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