Analog Sources And Digital Input/Output Sources; Analog Sources; Digital Output Sources; Digital Input Sources - ABB AWT420 Operating Instruction

AW T4 2 0 | U N I V E R S A L 4 - W I R E , D U A L- I N P U T T R A N S M I T T E R | O I/A W T4 2 0 - E N R E V. B

Analog sources and digital input/output sources

Analog sources

Source name*
S1 (to 2)
Temperature 1 (to 2)
S1 (to 2) control O/P
S1 (to 2) control O/P (A)
S1 (to 2) control O/P (B)
Inferred pH
Difference
Ratio
% Passage
% Rejection

Digital output sources

Source name*
Alarm 1 (to 8) State
S1 (to 2) Failure
S1 (to 2) Out of Spec.
S1 (to 2) Maintenance
S1 (to 2) Function Check
Tx Failure
Tx Out of Spec.
Tx Maintenance
Tx Function Check
S1 (to 2) Cal in Progress
S1 (to 2) Cal Failed
S1 (to 2) Clean
S1 (to 2) control O/P
S1 (to 2) control O/P (A)
S1 (to 2) control O/P (B)
Inferred pH
Difference
Ratio
% Passage
% Rejection

Digital input sources

Source name*
S1 (to 2) Hold
S1 (to 2) Clean Sequence
Note. It is recommended that a momentary switch is used to start or abort digital input operations and a toggle switch is used for the hold functionality.
To start a digital input operation – hold the momentary switch for a minimum of two seconds; release the switch when the digital input operation starts.
To abort a digital input operation – hold the momentary switch for a minimum of two seconds; release the switch when the digital input operation aborts.
*(2) = maximum number of sensors if multiple sensors are connected.
Description
Measured concentration value for the associated sensor.
Measured temperature value for the associated sensor.
Control output – single.
Control output – dual (acid).
Control output – dual (base).
Calculation based on dual 2-electrode conductivity.
Calculation based on dual 2-electrode conductivity.
Calculation based on dual 2-electrode conductivity.
Calculation based on dual 2-electrode conductivity.
Calculation based on dual 2-electrode conductivity.
Description
Process alarm state (alarm 1 to 8).
The associated sensor is in the failed state – see Appendix A, page 42 for possible causes.
The associated sensor is out of specification – see Appendix A, page 42 for possible causes.
The associated sensor requires maintenance – see Appendix A, page 42 for possible causes.
The associated sensor requires checking – see Appendix A, page 42 for possible causes.
The transmitter is in the failed state – see Appendix A, page 42 for possible causes.
The transmitter is out of specification – see Appendix A, page 42 for possible causes.
The transmitter requires maintenance – see Appendix A, page 42 for possible causes.
The transmitter requires checking – see Appendix A, page 42 for possible causes.
A calibration is in progress for the associated sensor.
The last calibration has failed for the associated sensor.
A clean is in progress for the associated sensor.
Control output – single.
Control output – dual (acid).
Control output – dual (base).
Calculation based on dual 2-electrode conductivity.
Calculation based on dual 2-electrode conductivity.
Calculation based on dual 2-electrode conductivity.
Calculation based on dual 2-electrode conductivity.
Calculation based on dual 2-electrode conductivity.
Description
The measured concentration for the associated sensor can be held via the digital input.
Note. Applicable only to some sensor types. Initiates an automated cleaning sequence.
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