Muib2 - Mcsu-4 User Interface Board (Type2); System Setup Requirement; Main Features Of Muib2; Muib2 Connections - Rectifier RT9- 24V Installation, Operation And Technical Manual

Installation, Operation and Technical Manual

4.4 MUIB2 - MCSU-4 User Interface Board (type2)

The MUIB2 is an optional module that may be used in place of the MUIB to allow
monitoring of a total of four battery currents and to directly measure one load current. The
MUIB2, like MUIB provides basic interfacing between the MCSU-4 and the system
environment. Use of this board also requires a specific MCSU-4 software version.
The addition of the load current transducer input allows the MCSU-4 to sense the load
current directly. This provides better resolution of the load current than the calculated
current determined from the reported individual rectifier output currents. This is because
there is an inherent resolution limit for each rectifier current measurement that can
significantly degrade the load current resolution when a system contains a large number of
rectifiers. Another use of the load current transducers is when non-RTP rectifiers are used
with a MCSU-4, and these rectifiers do not signal their current to the MCSU-4.
The current transducers are standard 4V full scale. Accuracy of signal conditioning for the
current signals is typically 1%.

4.4.1 System setup requirement

The MCSU-4 software needs to be a version with an MUIB2 option. This board needs to
be enabled from the front panel of the MCSU-4 or PC running WinCSU-2 program. The
load transducer also needs to be enabled or disabled as necessary. The full scale value
of battery and load transducers then needs to be entered.

4.4.2 Main features of MUIB2

The principal features of the MUIB2 are as follows:
 Each battery current input accepts input range of -4V to +4V full scale. The maximum allowed input is 
5V
 The load current input range is from 0V to +4V. The maximum allowed input is 0 to +5V.
 The battery and load full scale currents are separated so different transducers for battery and load
currents can be used.
 Signal conditioning accuracy for the battery and load currents is typically 1%.
 Actual number of batteries used can be programmed via MCSU-4 front panel or WinCSU-2 remotely.
 Load transducer can be switched on or off via MCSU-4 front panel or WinCSU-2 remotely.
 When the load transducer is switched off, MCSU-4 automatically reverts back to calculating load current
using SMR and battery currents.
 There are 5 relay outputs, 4 digital inputs, LVDS interface, CB trip input and Battery switch input.
 Ambient and battery temperature sensors can be connected to this board.
 The MUIB2 also provides power to the MCSU-4, this board can be connected to the bus and battery at
the same time.
 Two spare analog inputs are available (input range: 0 to +5V).

4.4.3 MUIB2 Connections

The MUIB2 connector wiring diagram is shown in the table of Figure 4.9, followed by the
connection diagram and connector legend in Figure 4.12.
4.4.3.1 Relay Contact Outputs
There are 5 relays with normally open (N/O) and normally closed (N/C) contacts available
on the MUIB2, connector X2. In standard RTP system three of the relays are for remote
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Rectifier Technologies
19-Feb-14