ABB DSAI133A 3BSE018290R1 Analog Input Board 32 Channels
Description:
DSAI133A 3BSE018290R1 is designed as ABB Advant Master Process Control System board. DSAI133A is based on the DSAI 133 for the standard S100 I/O system. The connection units are made with dual connections. The DSAI 133N board is used with connection unit DSTA N040 (shunt resistor 2x125 ohm in series) which includes logic board DSTA N041. 
The AI-board database configuration is equal to DSAI 133. Channel 32 is used by the SAI software for test values to indicate if field values or test values are applied on the other 31 channels. 
The loop signals are connected to the connection unit. This unit contains:
 • Terminals for connection of 31 single ended analog input signals. Power distribution for field devices.
 • The logic board is equipped with circuits for generation of test signals, as well as logic which controls the sequential alternation between field values and test values. 
The input board DSAI 133N contains: 
• The hardware used is based upon a standard DSAI 133 board, with 32 channels. The AIboard starts to synchronize with the input channel test sequence as soon as the start-up phase is finished. When it is synchronized with the connection unit, cyclic diagnostics will be executed.
 • Software to distinguish between test values and field values. The field values are updated every 248 ms. The operation of the analog input board is monitored. The monitoring task executes with a cycle of one second.