Fuji Electric FRENIC-HVAC User Manual page 50

Symbol Name
[C1] Analog setting
current input
(C1 function)
PTC thermistor
input
(PTC function)
[V2] Analog setting
voltage input
(V2 function)
[11] Analog common Common for analog input/output signals ([13], [12], [C1], [V2],
(1) The frequency is commanded according to the external analog
current input.
• 4 to 20 mA DC/0 to 100% (Normal operation)
• 0 to 20 mA DC/0 to 100% (Normal operation)
• 20 to 4 mA DC/0 to 100 % (Inverse operation)
• 20 to 0 mA DC/0 to 100 % (Inverse operation)
(2) In addition to frequency setting, PID command, PID feedback
signal, auxiliary frequency command setting, ratio setting,
upper/lower frequency limits, or analog input monitor can be
assigned to this terminal.
(3) Hardware specifications
• Input impedance: 250Ω
• The maximum input is +30 mA DC, however, the current
exceeding +20 mA DC is handled as +20 mA DC.
(1) Connects PTC (Positive Temperature Coefficient) thermistor
for motor protection. Ensure that the slide switch SW5 on the
control PCB is turned to the PTC position (refer to Section
2.3.2 "Setting up the slide switches").
The figure shown below illustrates the internal circuit diagram
where SW5 (switching the input of terminal [C1] between C1
and PTC) is turned to the PTC position. For details on SW5,
refer to Section 2.3.2 "Setting up the slide switches." In this
case, you must change data of the function code H26
accordingly.
[13]
Resistor
27kΩ
SW5
[C1]
C1
PTC
thermistor
[11]
Figure 2.1 Internal Circuit Diagram
(SW5 Selecting PTC)
(1) The frequency is commanded according to the external analog
voltage input.
• 0 to ±10 VDC/0 to ±100 % (Normal operation)
• +10 to 0 VDC/0 to 100% (Inverse operation)
(2) In addition to frequency setting, PID command, PID feedback
signal, auxiliary frequency command setting, ratio setting,
upper/lower frequency limits, or analog input monitor can be
assigned to this terminal.
(3) Hardware specifications
• Input impedance: 22kΩ
• The maximum input is ±15 VDC, however, the voltage
exceeding ±10 VDC is handled as ±10 VDC.
• Inputting a bipolar analog voltage (0 to ±10 VDC) to
terminal [V2] requires setting function code C45 to "0."
[FM1] and [FM2]).
Isolated from terminals [CM]s and [CMY].
2-17
2.3 Terminal Specifications
Functions
<Control circuit>
+10 VDC
(Operation level)
H27
Compartor
PTC
H26
0 V
External
alarm