Eaton M-Max series, Руководство по эксплуатации

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04/10 MN04020001Z-EN
Electrical Installation
45
Analog inputs
Connection area of the analog and digital inputs and outputs.
The frequency inverter M-Max
TM
has two analog inputs for
specifying the frequency setpoint value and the actual value return
to the PI controller:
• Control signal terminal 2 (AI1), voltage signal 0 (2) - +10 V,
input resistance 200 k
O?
• Control signal terminal 4 (AI2), current signal 0 (4) - 20 mA,
Load resistance 200
O?
Adjusting and the parameter definition of analog inputs are
described in Section “Analog input (P2)”, page 75.
The analog input AI1 (control signal terminal 2) is factory set for
the frequency setpoint (P6.2). The setpoint can be input via an
external potentiometer (recommended fixed resistance: 1 k
O
to
10 k
O
). The fixed resistance of the setpoint potentiometer is fed
from the frequency inverter via the control signal terminal 1 with
+10 V (maximum load rating: 10 mA). Control signal terminals 3
and 5 are reference points (GND) for the analog setpoint signals.
Figure 40: Control signal terminals (digital and analog inputs/
outputs)
Figure 41: Analog setpoint inputs AI1 and AI2
Connection example: Potentiometer (4.7 k
O )
M22-R4K7; Article no. 229490
Figure 42: Analog setpoint value signal, e. g. from a superordinate
controller (PLC)
1 2 3 5 4
0 (4)...20 mA
AI
1
GND < 10 mA +10 V Out
S3 S2
GND
0...+10 V
200 k O 200 k O
200 O 200 O
AI2
PI-Ist
f-Soll
S2 = AI1 V
(0...+10 V)
AI1
V mA
S3 = AI2 mA
(4...20 mA)
AI1
V mA
3 2
AI
1
0...+10 V
200 k O
GND
f-Soll