Rtd/Ma Inputs/Ma Outputs; Function Blocks; Functionality - ABB RELION REX640 Technical Manual

1MRS759142 F
Figure 64: Internal fault signal output IRF
3.15

RTD/mA inputs/mA outputs

3.15.1

Function blocks

Figure 65: Function block for mA channel
Figure 66: Function block for RTD channel
3.15.2

Functionality

The Slot#-mA#/RTD# function is an interface function between the relay's mA/RTD
hardware channels. The function is split into separate function blocks for each
hardware channel.
The mA function block works as an interface for the mA current channel. The channel
can be defined either as a measuring input or a controllable output.
The RTD function block works as an interface for the RTD measuring channel that
supports various types of RTD sensors.
Both function blocks have limit supervision alarm outputs and an output for sensor
fault.
REX640
Technical Manual
Basic functions
169