4–9

SJ200 Inverter

Using Intelligent Input Terminals

Terminals [1], [2], [3], [4], [5], and [6] 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 SJ200 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, the just follow the wiring diagrams in this section for your application.

The inverter has a DIP switch 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 right, the SR/SK switch (“source/sink switch”) is shown as located on the circuit board, at the right end of the logic signal connector.

DO NOT confuse it with the two, larger configuration switches nearby. The circuit board has the SR and SK markings above and below the switch as shown.

Logic inputs

SR

L 6 5 4 3 2 1 PCS

SK

Legend:

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

SR

 

SR

Source

 

 

 

 

 

 

Sink

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(default)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

SK

 

SK

CAUTION: Be sure to turn OFF power to the inverter before changing the SR/SK switch position. Otherwise, damage to the inverter circuitry may occur.

[PCS] Terminal Wiring - The [PCS] terminal (Programmable Control System terminal) is named to include various devices that can connect to the inverter’s logic inputs. In the figure to the right, note the [PCS] terminal and the nearby diodes and DPDT switch. The upper part of the SR/SK switch selects between connecting the inverter’s +24V internal supply to [PCS] or allowing an external supply power to connect. The lower part of the SR/SK switch selects between connecting the input circuit common node to either Logic GND or the +24V supply.

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

SJ200

PCS

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

SK

 

24V

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

SR

 

+

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

SK

 

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Input common

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1

Input

circuits

6

LLogic GND

Operations Monitoring and