User`s manual

2-4

 Circuit Descriptions

Refer to the numbers indicated in Fig 2.2.

1 These circuits are hazardous and are separated from accessible surfaces by protective separation

2 These circuits are separated from all other circuits by protective separation consisting of double and

reinforced insulation. These circuits may be interconnected with SELV

(or equivalent) or non-

SELV

circuits, but not both.

3 Inverters supplied by a four-wire-system source (neutral grounded)

These circuits are SELV

circuits and are separated from all other circuits by protective separation

consisting of double and reinforced insulation. These circuits may only be interconnected with

other SELV

(or equivalent) circuits.

Inverters supplied by a three-wire-system source (ungrounded or corner grounded)

These circuits are not separated from hazardous circuits other circuits by protective separation, but

only with basic insulation. These circuits must not be interconnected with any circuits which are

accessible, unless they are isolated from accessible circuits by supplemental insulation

* SELV = Safety Extra Low Voltage

IMPORTANT

1. Control circuit terminals are arranged as shown below.

2. The output current capability of the +V terminal is 20 mA.

3. Main circuit terminals are indicated with double circles and control circuit terminals are indicated with single cir-

cles.

4. The wiring of the digital inputs S1 to S7 is shown for the connection of contacts or NPN transistors (0V common

and sinking mode). This is the default setting.

For the connection of PNP transistors or for using a 24V external power supply, refer to page 2-24, Sinking/Sourc-

ing Mode.

5. The master speed frequency reference can be input either at terminal A1 or at terminal A2 by changing the setting

of parameter H3-13. The default setting is terminal A1.

6. The multi-function analog outputs are dedicated meter outputs for analog frequency meters, ampmeters, voltme-

ters, wattmeters, etc. Do not use these outputs for feedback control or for any other control purposes.

7. DC reactors to improve the input power factor are built into 200 V Class Inverters from 22 up to 110 kW and 400 V

Class Inverters from 22 up to 300 kW. A DC reactor is an option only for Inverters of 18.5 kW or less. Remove the

short circuit bar when connecting a DC reactor.