30
IO Modual
When DO circuits work in energy output mode, parameters of DO energy
pulse constant should also be set correctly, which include “active pulse
constant (100aH)” and “reactive pulse constant (100bH)”, as shown in
gure 3-8.
The value of pulse constant should satisfy following expression:
Pulse constant >( +1) ×
In the expression, the “Pmax” is the maximum power or reactive power.
The unit is watt or var. Recommend pulse constant is 3 to 5 times the
right side value of the above expression
.
3.5 Analog Output
1. Analog Output Relationship with Electrical Quantities
The analog output circuit can convert anyone of 30 electrical quantities
(reference to Acuvim II User’s Manual), which is selected by user, to
analog voltage or current.
The analog output circuit supplies 4 output modes, including 0 to 20mA
mode, 4 to 20mA mode, 0 to 5V mode and 1 to 5V mode.
Figure 3-9 shows the relationship between analog output and various
electrical quantities.
45
65
0
20
mA
Frequency(Hz)
400
mA
Phase Voltage(V) Line Voltage(V) Current(A)
Phase Ac tive/Rea ctive
Power(W/Var)
Total Active/Reactive
Power(W/Var)
mA
Phase Appa rent
Power(VA)
Total Apparent
Power(VA)
0
20
mA
Power Fac tor
0.5C
10
1 0.5L
0-20mA output mode
69
24
480
0
0
20
24
690
mA
828
0
0
20
24
5
mA
6
0
0
20
24
2000
mA
2800
0
-2000
20
24
6000
mA
8400
0
-6000
20
24
2000 2400
0
0
20
24
6000
mA
7200
0
0
20
24
DO Pulse Width
20
Pmax
18×10
6
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