07KR51-W3.9 1SBP260010R1001 ABB

An internal 24 V d.c. power supply is available on 120 / 230 V a.c. versions. This power supply 

feeds the binary inputs of the unit and its extensions This internal power supply is protected 

against short circuits and overloads. In the case of a short circuit or overload it is available 10 

seconds after the fault elimination. 

The ICMK14F1-M and ICMK14N1-M are remote units for MODBUS®

 system bus and they are 

used in order to decentralise inputs and outputs via a RS485 twisted pair connection. 

The ICMK14F1-M and ICMK14N1-M possess the MODICON MODBUS RTU protocol and are 

compatible with most of MODBUS master devices. They can accept and recognize 

automatically different speed baud rates up to 187Kbauds depending of the MODBUS master 

connected. 

In addition, they have large input / output capacity and can manage from 14 to 200 inputs / 

outputs with additional extensions. The extensions used to increase the number of inputs / 

outputs on ICMK14F1-M and ICMK14N1-M can be binary or analog types. These extensions 

are the same used with AC31 series 40 and 50 (see references inside technical documentation 

– 1SBC260400R1001) 

The ICMK14F1-M and ICMK14N1-M give a complete access to their inputs and outputs to 

MODBUS master without a specific configuration action, It will just be necessary to the 

MODBUS master to read or write the correct MODBUS addresses corresponding to inputs 

and outputs of ICMK14F1-M and ICMK14N1-M. 

Diagnosis on ICMK14F1-M and ICMK14N1-M is available and accessible through the 

MODBUS master. It allows to identify if there is a bus extension error or one extension is 

disconnected and also if there are some output errors (Overload and short-circuit) 

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