ABB DSRF185 3BSE004382R1 Rack

 

 

The S100 I/O system consists of I/O boards with 4 to 32 channels, depending on type. The boards are placed in I/O sub-racks with the following dimensions:

Width: 482,6mm (19")

Height: 347mm (13.7") (including cable duct)

Depth: 335mm (13.2")

 

 

 

 

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 connection units have additional terminals for power distribution to sensors and actuators. For analog inputs the connection units also include current shunts. This feature makes it possible to exchange analog input boards without breaking any current loops. Digital I/O boards have LED indicators showing the status of each channel. Analog input units have a LED indicating completion of each A/D conversion. Diagnostic functions are executed for all I/O boards at system start-up and during normal operation. Any fault detected is indicated by a LED on the I/O boards face plate, and by a system error message reported to Advant Station 500 Series Operator Stations or to Advant Station 100 Series Engineering Stations connected to the controller concerned. 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.