4 - 4 VM600 MPS hardware manual (standard version) MAMPS-HW/E
Edition 17 - February 2018
General block diagram
MPC4 / IOC4T CARD PAIR
4.2 General block diagram
A block diagram of the MPC4, IOC4T, RLC16 and IRC4 cards is shown in Figure 4-2. This
shows schematically the backplane, which physically divides the ABE04x rack into a front
card cage and a rear card cage.
The MPC4 (shown on the left of Figure 4-2) is mounted in the front card cage. This card
effects the signal processing functions for the MPS. Its panel contains BNC connectors to
output the raw measurement signals (for example, corresponding to vibration or dynamic
pressure) and speed signals. An LED indicator (DIAG/STATUS) shows the hardware status
of the MPC4 / IOC4T card pair. Additional LED indicators are present to provide information
on the status of each individual channel (such as signal valid or the presence of alarms). The
panel also has a 9-pin D-sub connector for configuring an MPC4 card used in a stand-alone
rack, that is, one not containing a CPUM card.
Each MPC4 card is necessarily connected (via the backplane) to an IOC4T input/output card
mounted in the rear card cage. The IOC4T card's panel (rear of rack) has screw terminals for
connecting the signal transmission lines coming from the transducers (for example, from
vibration and speed transducers). Other screw terminals are used to output raw signals as
well as processed signal values (0 to 10 V or 4 to 20 mA).
The IOC4T contains 4 local relays with outputs available on the screw terminal strip. In
applications needing more than the four relays provided by the IOC4T, an RLC16 relay card
or an IRC4 intelligent relay card can be installed in the rack.
The RLC16 card contains 16 relays and has a terminal strip with 48 screw terminals (3 strips
each having 16 terminals).
The IRC4 card contains 8 relays that can be combined as 4 DPDT or 8 SPDT and has a
terminal strip with 32 screw terminals (2 strips each having 16 terminals).
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