ABB 23BE21 1KGT004900R5012 Binary Input Board
Description:
23BE21 is designed as ABB Remote Terminal Unit RTU560 system I/O board. 23BE21 is a 16 input channels galvanic isolated and grouped in 2 groups of 8 signals 24 … 60 V DC input.
The data processing functions of the communication interface are described in the documentation of the respective communication protocol. The process data acquisition functions for indications processed by the RTU560 can be split into functions handled by the 23BE21.

23BE21 functions: 
• Reading input register (every millisecond) 
• Digital filter (contact bouncing) 
• Oscillation suppression (signal chattering) 
• Signal inversion 
• Time out monitoring for DPI intermediate position 
• Store events in FIFO with time stamp 
On 23BE21 board it is possible to mix any type of binary inputs. E.g. inputs not assigned to DPI or SPI may be configured as pulse counter indications as, digital measured values on bit-string inputs. Digital measured values and bit-string inputs must be configured such to start with bit position 1/9.  

Related items:
23AE21
23BA20
23NG23
23WT21
23ZG21