Hitachi hitachi series inverter Using Intelligent Input Terminals, Sink logic connection

Using Intelligent Input Terminals

Terminals [1], [2], [3], [4], [5], [6] and [7] are identical, programmable inputs for general use. The input circuits can use the inverter’s internal (isolated) +24V field supply or an external power supply. This section describes input circuits operation and how to connect them properly to switches or transistor outputs on field devices.

The WJ200 inverter features selectable sinking or sourcing inputs. These terms refer to the connection to the external switching device–it either sinks current (from the input to GND) or sources current (from a power source) into the input. Note that the sink/source naming convention may be different in your particular country or industry. In any case, just follow the wiring diagrams in this section for your application.

The inverter has a jumper wire for configuring the choice of sinking or sourcing inputs. To access it, you must remove the front cover of the inverter housing. In the figure to the top right, the jumper wire is shown as attached to the logic terminal block (connector). If you need to change to the source type connection, remove the jumper wire and connect it as shown in the figure at the bottom right.

Logic inputs

7 6 5 4 3 2 1 L PLC P24

Jumper wire

Sink logic connection

7 6 5 4 3 2 1 L PLC P24

Jumper wire

Source logic connection

CAUTION: Be sure to turn OFF power to the inverter before changing the jumper wire position. Otherwise, damage to the inverter circuitry may occur.

[PLC] Terminal Wiring – The [PLC] terminal (Programmable Logic Control terminal) is named to include various devices that can connect to the inverter’s logic inputs. In the figure to the right, note the [PLC] terminal and the jumper wire. Locating the jumper wire between [PLC] and [L] sets the input logic source type, which is the default setting for EU and US versions. In this case, you connect input terminal to [P24] to make it active. If instead you locate the jumper wire between [PLC] and [P24], the input logic will be sink type. In this case, you connect the input terminal to [L] to make it active.

Jumper wire

for sink logic

P24

PLC

1

7

L

Jumper wire

for source logic

WJ200 inverter

Input common 24V

+

-

Input circuits

Logic GND

The wiring diagram on the following pages show the four combinations of using sourcing or sinking inputs, and using the internal or an external DC supply.

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