ABB DSAI133 57120001-PS Analog Input 32 Channels
Description:
DSAI133 57120001-PS is designed as ABB Advant Master Process Control System board. DSAI 133 is a 32 channel analog input board, which can also be used in pairs, for a redundant connection. It is used with DSTA 002A and DSTK 152.
DSAI 133 has an internal board processor which controls the A/D conversioncyclically. Automatic adjustment of both zero point and gain are also performed with the help ofthe board processor. For all other boards, the zero point and gain must be adjusted manually orby the controller software.
The S100 I/O system consists of I/O boards with 4 to 32 channels, depending on type. 
The sub-racks are mounted in cabinets and are fitted with guide bars for I/O boards and other plug-in units. Each board is connected to the back plane of the rack. One or several connection units with screw terminal blocks for connection of the process cables are provided for each I/O board. The connection units are connected with the I/O board via standard cables and are normally mounted in the rear part of the cabinet.
The analog input signals are protected against over-voltage and hf-filtering by the connection unit. A low-pass filtering amplifier with programmable gain and A/D conversion is handled on the AI-board. The amplifier can be programmed to handle a wide range of voltage and current inputs, 4-20mA, 2-10mA, 0-±10mA, 0-10V, 0-±10V, 0-5V, 0-±5V and so on depending of type of I/O-board and connection unit. For some of the digital input boards local time tagging on the input board are available for process events, thus providing a very good time resolution. I/O boards can be exchanged while the system is running. New boards and functions can be added while the system is in operation.