96
5. PARAMETERS
5.5 (T) Multi-function input terminal parameters
External thermal relay (OH signal, E.OHT)
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 operation (E.OHT).
• The OH signal is assigned to terminal OH in the initial status. To assign the signal, set "7" in any parameter from
Pr.178,
Pr.187,
or
Pr.189 (Input terminal function selection)
.
NOTE
• Changing the terminal assignment using
Pr.178, Pr.187,
or
Pr.189 (Input terminal function selection)
may affect the other
functions. Set parameters after confirming the function of each terminal.
Operation selection for the OH signal (Pr.876)
• The OH signal input status and the
Pr.876
setting for the converter operation are as shown below.
Inverter
Converter
unit
Thermal relay protector
Motor
U
V
W
OH
SD
M
OH signal input status
(external terminal)
Converter unit operation
Pr.876 = "0"
Pr.876 = "1" (NC contact)
Pr.876 = "2" (NO contact)
ON
Function disabled.
Operation continues.
Inverter output shutoff (E.OHT).
OFF
Function disabled.
Inverter output shutoff (E.OHT).
Operation continues.
