Omron MX2 Series - Wiring for Main Circuit Terminals

2 Design
2 - 17
Multi-function Compact Inverter 3G3MX2-EV2 User’s Manual (I666-E1)
Item
Terminal
symbol
Terminal
name
Description
Specifications
Digital
Output
EO
Pulse output
This terminal outputs pulses.
Output pulse: 32 kHz
max.
Output voltage: 10
VDC
Allowable current:
2 mA max.
Serial communications
SP
SN
Modbus ter-
minal
(RS-485)
RS-485 terminal
RS+: RS-485 differential (+) signal
RS−: RS-485 differential (−) signal
Speed: 115.2 kbps
max.
Built-in terminating
resistor: 120 
Switching via slide
switch
Precautions for Correct Use
The Multi-function Relay Output (AL1, AL2) Function Selection (C026) is, by default, set to 05
(AL: Alarm signal).
The table below shows the relationship between the relay output status when the inverter input
power supply is ON/OFF and the Multi-function Relay Output (AL1, AL2) Operation Selection
(C036) setting. Select the parameter setting appropriate to the sequence of your inverter
according to this table.
Setting in C036
Input power
supply
Inverter status
Relay output status
Between
AL1 and AL0
Between
AL2 and AL0
00
ON
Normal
Open
Closed
Alarm output
Closed
Open
OFF
—
Open
Closed
01 (Default data)
ON
Normal
Closed
Open
Alarm output
Open
Closed
OFF
—
Open
Closed
2-3-4 Wiring for Main Circuit Terminals
• Before wiring, make sure that the charge indicator is not lit.
• Once the power supply is turned on, the capacitor in the inverter remains charged with a high
voltage for a while after the power supply is shut off regardless of whether the inverter is run-
ning or not, which is dangerous.
• If you change cable connections after the power supply is shut off, wait for at least
10 minutes and, before wiring, check with a circuit tester etc. to be sure that there is no resid-
ual voltage between terminals P/+ and N/−.
2
2-3 Wiring
2-3-4 Wiring for Main Circuit Terminals
Precautions for Safe Use