Contrel EMS-96 - Analog Output Configuration

EMS-96 Instruction Manual IM1200-U v1.6 Pag. 37 / 48
Setup  I/O  AO 1, 2, 3, 4
Analog output X* (option)
Range
Default
Range
0÷5V / 0÷10V / ±5V / ±10V / 4÷20mA / 0÷20mA
0 ÷5V
Selection of the modality of the output (current or voltage) and relative limits.
Measure group
See Acronyms Group table
Selection of the group for the actual analog output.
Measure associated
See acronym in the table of the group selected
---
Selection of the measure to associate of the actual analog output, inside the selected Measure group.
High threshold
± 9999
0
Maximum value associated to the high threshold associated.
High threshold unit
See below
See below underlined
Unit measure of threshold.
Voltage: mV-V-kV-MV Active Power: W-kW-M-GW Temperature: °C
Current: mA-A-kA-MA Reactive Power: VAr-kVAr-MVAr-GVAr THD and harmonics: %*100
Apparent Power: VA-kVA-MVA-GVA Frequency: mHz Angle: degree*10
Low threshold
± 9999
0
Minimum value associated to the low threshold.
Low threshold unit
See below
See below underlined
Unit measure of threshold.
Voltage: mV-V-kV-MV Active Power: W-kW-M-GW Temperature: °C
Current: mA-A-kA-MA Reactive Power: VAr-kVAr-MVAr-GVAr THD and harmonics: %*100
Apparent Power: VA-kVA-MVA-GVA Frequency: mHz Angle: degree*10
* These settings are used for the optional analog outputs from AO-1 to AO-4.
Example: to associate the L1 phase voltage to the analog output it is necessary select instantaneous for the item Measure group and the
acronym V1 for the item Measure associated. If the maximum value is set to 300V and 100V to the minimum, with the scale of 0÷20mA, it will
have that with 200V as measured voltage, the output will be 10 mA.
Only for the power factor, cos and tan is used a different logic (see the following example).
Selecting the cos or the power factor as a measure to associate to the analog output, the intermediate output value (10 or 12
mA) is set to cos =1 (and coinciding with cos =-1). The value of the output signal will trend to increase when the positive values
of cos decrease from 1 to 0 while for the negative values, it will decrease when the value trend to 0.
Example: Setting +800 and -800 as maximum and minimum values when cos =0.9 the value will be 15 mA, while when the cos =-0.9 it will be
5 mA.
In the case of selection of tan the intermediate output value (10 or 12 mA) is set to tan =0 and the output signal will be directly
proportional to the variation of the measure.