ABB 07KR91 GJR5250000R0303 Advant Controller 31 Basic Units
Description:
07KR91 is belong to ABB Advant Controller 31 system. It works either as 
· bus master in the decentralized automation system Advant Controller 31 or as
· slave (remote processor) in the decentralized automation system Advant Controller 31 or as
· stand-alone basic unit.
The module is provided in two versions with supply voltages of 24 V DC and 115/ 230 V AC:
07 KR 91 R303: (same functions as R202)
The device has a 115/230 V AC power supply voltage. It provides a 24 V output voltage for the supply of its own digital inputs.
07 KR 91 R353: (same functions as R252)
The device has a 24 V DC power supply voltage. It is provided with an additional interface for connecting communication modules (e.g. 07 KP 90).
Both versions have the following main features:
· 20 digital inputs
· 12 digital relay outputs
· 1 counting input for counting frequencies up to 10 kHz
· 1 CS31 system bus interface for system expansion.
· Serial interface COM1
 is set as programming interface
 can be set as an ASCII interface for connecting peripheral devices (e.g. MMC devices)
Real-time clock
· LEDs for displaying the digital input and output signals as well as operating conditions and error messages
· Detachable screw-type terminal blocks
· Fastening by screws or by snapping the device onto a DIN rail
· Lithium battery 07 LE 90 can be put into the battery compartment in order to
store and back-up the user program in the RAM
store and back-up data which is additionally contained in the RAM, e.g. the status of flags
back-up the time and date (real-time clock)
RUN/STOP switch for starting and aborting the program execution
· Extensive diagnosis functions
 Self-diagnosis of the basic unit
 Diagnosis of the CS31 system bus and the connected modules