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Input terminals
1.7.2 External thermal relay input (OH)
1.7.3 Speed setting potentiometer connection (10E, 2 (1), 5)
As an analog speed setting input signal, a voltage signal can be input.
The relationships between the speed setting input voltages and output speeds are as shown below. The speed
setting input signals are proportional to the output speeds. Note that when the input signal is less than the starting
speed, the output speed of the inverter is 0r/min.
If the input signal of 10VDC or higher is entered, it cannot exceed Pr. 1 "maximum speed".
Relationships between Speed Setting Inputs and Output Speeds
(1) Voltage input (10E, 2, 5)
Enter the speed setting input signal of 0 to 10VDC across the speed setting input terminals 2-5. The maximum
output speed is reached when 10V is input across terminals 2-5.
The power supply used may either be the inverter's built-in power supply or an external power supply. For the built-
in power supply, terminals 10E-5 provide 10VDC output.
(2) Multi-function input (1, 5)
The analog input function can be multi-functioned, e.g. compensation signal may be entered across the main speed
setting terminals 2-5 for synchronous operation.
Across auxiliary input terminals 1-5 ... 0 to ±10VDC
The function of terminal 1 depends on the setting of Pr. 868 "terminal 1 function assignment". Refer to page 183 for
details of Pr. 868.
When the external thermal relay or the built-in thermal relay of the motor (thermal
relay protector) is actuated to protect the motor from overheat, the inverter output
can be shut off and the corresponding alarm signal can be provided to hold a stop
status. Even if the thermal relay contact resets, the motor cannot be restarted unless
the reset terminal RES-SD are shorted for more than 0.1s and then opened or a
power-on reset is made.
Therefore, this function can be used as an externals emergency stop signal input.
Related parameters
Maximum speed setting Pr. 1 "maximum speed" (Refer to page 76.)
• Use terminal 10E for the built-in power supply.
Inverter
U
V
W
OH
SD
Thermal relay
Motor
IM
Speed setting terminal 2 gain speed
(Terminal 1 gain)
(30r/min to 3600r/min)
Maximum speed
(0 to 3600r/min)
Minimum speed
(0 to 3600r/min)
Starting speed
(0 to 1500r/min)
1
0
Input voltage is
proportional to
output speed.
Pr.903
Pr.918
Pr.1
Pr.2
Pr.13
Pr.73
10V
Speed setting signals
Output speeds (r/min)
+10V
10E
2
5
0 to 10VDC