Hitachi WJ Series User Manual page 82

Chapter 5
Function and electrical specifications of control circuit terminals
Item
Analog input/output
Power
supply
Analog
input
Thermistor
input
Monitor
output
Terminal Terminal
symbol name
Common for
L
input signal
Power supply
H for frequency
setting
Analog input 1
Ai1
(Voltage input)
Analog input 2
Ai2
(Current input)
External
5
thermistor
[PTC]
input
Ao1 Analog output
Description
Common terminal for
internal power supply,
input terminal 1 to 8,
analog input/output and
pulse output terminals.
10 VDC power supply.
Used when inputting a
frequency command from
the [Ai1] terminal with a
variable resistor.
0 to 10 VDC voltage
input. It is adjusted at the
factory to reach the
maximum frequency at
9.8 V input. (Adjustable
with [A011] to [A014].)
4 to 20 mA current
inputs. It is adjusted at
the factory to reach the
maximum frequency at
19.8 mA input.
(Adjustable with [A101] to
[A105].)
Set "External thermistor
[PTC]" in "Input terminal 5
function selection
[C005]" to be enabled.
An external thermistor is
connected between this
terminal and the [L]
terminal to trip the
inverter due to a
temperature error. (Trip
at approx. 3 kΩ or more.)
Regardless of the sink or
source logic, the common
is the [L] terminal.
The monitor value
selected by the
parameter is output as a
0 to 10 VDC voltage
signal. (Adjustable with
[C106] and [C109].)
5-4-4
Wire Connection
Electrical characteristics
―
Maximum allowable input
current: 10 mA
Input impedance:
Approx. 10kΩ
Allowable input voltage range:
-0.3 to +12 VDC
Input impedance:
Approx. 100 Ω
Allowable input current
range: 0 to 24 mA
PTC type
Maximum allowable current:
2 mA
Output voltage accuracy ±
10%
(Ambient temperature: 25°C
± 10°C)