2-16
Table 2.9 Symbols, Names and Functions of the Control Circuit Terminals
Classifi- cation
Symbol Name
Functions
[13] Power
supply
for the
potentio-
meter
Power supply (+10 VDC) for frequency command potentiometer
(Potentiometer: 1 to 5k
Ω
)
The potentiometer of 1/2 W rating or more should be connected.
[12] Analog
setting
voltage
input
(1) The frequency is commanded according to the external analog input
voltage.
• 0 to
±
10 VDC/0 to
±
100% (Normal operation)
•
±
10 to 0 VDC/0 to
±
100% (Inverse operation)
(2) Inputs setting signal (PID command value) or feedback signal.
(3) Used as additional auxiliary setting to various frequency settings.
• Input impedance: 22k
Ω
• The maximum input is +15 VDC, however, the current larger than
±
10 VDC is handled as
±
10 VDC.
Note:
Inputting a bipolar analog voltage (0 to
±
10 VDC) to terminal [12]
requires setting function code C35 to "0."
Analog
setting
current
input
(C1
function)
(1) The frequency is commanded according to the external analog input
current.
• 4 to 20 mA DC/0 to 100% (Normal operation)
• 20 to 4 mA DC/0 to 100 % (Inverse operation)
(2) Inputs setting signal (PID command value) or feedback signal.
(3) Used as additional auxiliary setting to various frequency settings.
• Input impedance: 250
Ω
• Maximum input is +30 mA DC, however, the current larger
than +20 mA DC is handled as +20 mA DC.
Analog
setting
voltage
input
(V2
function)
(1) The frequency is commanded according to the external analog input
voltage.
• 0 to +10 VDC/0 to +100 % (Normal operation)
• +10 to 0 VDC/0 to +100 % (Inverse operation)
(2) Inputs setting signal (PID command value) or feedback signal.
(3) Used as additional auxiliary setting to various frequency settings.
• Input impedance: 22 k
Ω
• Maximum input is +15 VDC, however, the voltage larger
than +10 VDC is handled as +10 VDC.
PTC
thermistor
input
(PTC
function)
(1) Connects PTC (Positive
Temperature
Coefficient) thermistor
for motor protection.
The figure shown below
illustrates the internal
circuit diagram. To use
the PTC thermistor, you
must change data of the
function code H26.
Figure 2.12 Internal Circuit Diagram
[C1]
The C1 function, V2 function, or PTC function can be assigned to terminal [C1]. Doing so
requires setting the slide switch on the interface PCB and configuring the related function
code. For details, refer to Section 2.3.7, "Setting up the slide switches".
Analog i
nput
[11] Analog
common
Common for analog input/output signals ([13], [12], [C1], and [FM])
Isolated from terminals [CM]s and [CMY].
