MCD Remote Operator
4-20 mA Analog Output
MG.17.E5.02 - VLT
®
is a registered Danfoss trademark
9
5.
4-20 mA Analog Output
N.B.!:
When using the Remote Operator with MCD 500 models MCD5-0023B ~ MCD5-0068B,
the motor current and analog output must be normalised using Pars. 6 and 9. =>
Programmable Parameters for details.
5.1.
Overview
The Remote Operator has a 4-20 mA analog output for monitoring motor current. The 4-20 mA output
is available on terminals B10, B11.
The analog output signal spans from 4 mA when the motor current is zero (when the soft starter is not
running) to 20 mA when the motor current is 125% of the Motor FLC setting in the Remote Operator
(Parameter 6).
N.B.!:
The 4-20 mA output is available only when the Remote Operator is connected to MCD 202,
MCD 500 and MCD 3000 soft starters.
5.2.
Calibration
The Remote Operator Motor FLC parameter (Parameter 6) must be adjusted to match the Motor FLC
setting in the soft starter. The lower end of the analog output signal can be calibrated using the Remote
Operator Analog Output 4 mA Offset parameter (Parameter 7). This is set to give a 4 mA output signal
when the motor current is zero.
The 4-20 mA analog output has an accuracy of ±10%. It is not designed for process signal control use
and should only be used for motor current monitoring and metering.
N.B.!:
The analog output uses only one Motor FLC setting. This function is not suitable for
applications using two motor parameter sets.
5.3.
Programming
When the 4-20 mA output is being used, the Remote Operator's Motor FLC and Analog Output 4 mA
Offset parameters (Parameters 6 and 7) must be set appropriately (=> Calibration above).
Programming can only be carried out while the soft starter is not running.
5.4.
Programming Procedure
1.
To enter Programming Mode, hold down the Data/Prog pushbutton for four seconds. The
default value of the first parameter will be displayed.
2.
Use the Data/Prog pushbutton to advance to the next parameter.
3.
Use the Stop and Reset pushbuttons to adjust parameter values.
Programming Mode closes when the Data/Prog pushbutton is pressed after Parameter 8.
N.B.!:
There is a 20 second timeout when the Remote Operator is in Programming Mode.
Programming Mode will automatically close if no input is registered for 20 seconds. Any
changes already made will be saved.
