8-7
8.3 Terminal
Specifications
8.3.1 Terminal
functions
For details about the main and control circuit terminals, refer to Chapter 2, Section 2.3.5 and
Section 2.3.6 (Table 2.8), respectively.
8.3.2 Connection diagram in operation by external signal inputs
(Note 1) Install a recommended molded case circuit breaker (MCCB) or a residual-current-operated
protective device (RCD)/earth leakage circuit breaker (ELCB) (with overcurrent protection) in the
primary circuit of the inverter to protect wiring. Do not use an MCCB or RCD/ELCB whose
capacity exceeds the recommended rated current.
(Note 2) A magnetic contactor (MC) should, if necessary, be mounted independent of the MCCB or ELCB
to cut off the power fed to the inverter. Refer to page 9-2 for details. MCs or solenoids that will be
installed close to the inverter require surge absorbers to be connected in parallel to their coils.
(Note 3) When connecting a DC reactor (option), remove the jumper bar from terminals [P1] and [P+].
(Note 4) The
THR
function can be used by assigning "9" (External alarm) to any of terminals [X1] to [X3],
[FWD] or [REV] (function code E01 to E03, E98, or E99). For details, refer to Chapter 9.
(Note 5) Frequency can be set by connecting a frequency setting device (external potentiometer)
between terminals [11], [12], and [13] instead of inputting voltage signal (0 to +10 VDC or 0 to +5
VDC) between terminals [12] and [11].
* With a built-in terminating
resistor switch
