Using Intelligent Input Terminals - Omron 3G3MX2 User Manual

Using Intelligent Input Terminals

4-5 Using Intelligent Input Terminals
!Caution Be sure to turn OFF power to the inverter before changing the short circuit bar
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) +24 V
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 MX2 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 short bar
(jumper) for configuring
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 short bar is
shown as attached to the logic
terminal block (connector). Origi-
nally is located as source type
logic. If you need to change to the
sink type connection, remove the
short bar and connect it as
shown in the figure at the bottom
right.
position. Otherwise, damage to the inverter circuitry may occur.
[PLC] Terminal Wiring – The
[PLC] terminal (Programma-
ble 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
short bar (jumper). Locating
the short bar between [PLC]
and [L] sets the input logic
source type, which is the
default setting. In this case,
you connect input terminal to
[P24] to make it active. If
instead you locate the short
bar between [PLC]
[P24], the input logic will be
sink type. In this case, you
connect the input terminal to
[L] to make it active.
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.
Logic inputs
the
7 6 5
Source logic connection
7 6 5
Sink logic connection
Short bar for
sink logic
P24
PLC
1
7
L
Short bar for
source logic
and
Section 4-5
4 3 2 1 L PLC P24
Short bar
4 3 2 1 L PLC P24
Short bar
MX2 inverter
Input common
24 V
+
-
Input
circuits
Logic GND
201