Mitsubishi Electric FR-A820-00046 (0.4K) Instruction Manual page 400

• For the terminal used for the THP signal output, assign the function by setting "8 (positive logic) or 108 (negative logic)" in
any of Pr.190 to Pr.196 (Output terminal function selection).
Electronic thermal
relay function
operation level
Electronic thermal O/L
relay alarm (THP)
OFF
NOTE
• Changing the terminal assignment using Pr.190 to Pr.196 (Output terminal function selection) may affect the other
functions. Set parameters after confirming the function of each terminal.
 External thermal relay input (OH signal, E.OHT)
Thermal relay protector
Inverter
Motor
U
V
M
W
OH
SD
External thermal relay input connection diagram
• The external thermal relay input (OH) signal is used when using the external thermal relay or the thermal protector built
into the motor to protect the motor from overheating.
• When the thermal relay is activated, the inverter output is shut off by the external thermal relay (E.OHT).
• For the terminal used for the OH signal input, set "7" in any of Pr.178 to Pr.189 (Input terminal function selection) to
assign the function.
• Vector-control-dedicated motors (SF-V5RU) are equipped with thermal protectors.
Inverter SF-V5RU
∗1
PC
2W1kΩ G1
OH
G2
SD
Connecting the SF-V5RU thermal protector
*1 Connect the recommended 2 W 1 kΩ resistor between terminals PC and OH. (Refer to
• When the control terminal option (FR-A8TP) is used, valid/invalid setting of the terminal OH can be changed using Pr.876
thermal protector input.
NOTE
• Changing the terminal assignment using Pr.178 to Pr.189 (input terminal function selection) may affect the other functions.
Set parameters after confirming the function of each terminal.
100%
85%
ON
ON
Time
page 90.)
5. PARAMETERS
5.10 (H) Protective function parameter
1
2
3
4
5
6
7
8
9
10
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