Other Analog Input-Related Topics:; Pulse Train Input Operation; Current Input; Frequency Command By Pulse Train Input - Omron 3G3MX2 User Manual

Analog Input Operation
4-7-1

Other Analog Input-related topics:

4-7-2

Pulse Train Input Operation

Current Input – The current input circuit
uses terminals [OI] and [L]. The current
comes from a sourcing type transmitter; a
sinking type will not work! This means the
current must flow into terminal [OI], and ter-
minal [L] is the return back to the transmitter.
The input impedance from [OI] to [L] is
100 Ohms. Attach the cable shield wire only
to terminal [L] on the inverter.
See I/O specs on
page 195
The following table shows the available analog input settings. Parameter
and the input terminal [AT] determine the External Frequency Command input
terminals that are available, and how they function. The analog inputs [O] and
[OI] use terminal [L] as the reference (signal return).

[AT] Input

ON
OFF

ON
OFF

ON
OFF
• "Analog Input Settings"
• "Additional Analog Input Settings"
• "Analog Signal Calibration Settings"
• "Analog Input Current/Voltage Select"
• "ADD Frequency Enable"
• "Analog Input Disconnect Detect"
The MX2 inverter is capable of accepting pulse train input signals, that are
used for frequency command, process variable (feedback) for PID control,
and simple positioning. The dedicated terminal is called "EA" and "EB". Termi-
nal "EA" is a dedicated terminal, and the terminal "EB" is an intelligent termi-
nal, that has to be changed by a parameter setting.
Relay contact
AL2 AL1 AL0
Terminal Name
EA Pulse train input A
EB Pulse train input B
(Set  to  )
(Input terminal 7)

1. Frequency Command by pulse train input

.
Analog Input Configuration
[O]
[OI]
[O]
Integrated POT on external panel
[OI]
Integrated POT on external panel
RS485
comm.
Logic input
SN 7 6 5 4
SP EO EA H O OI
RS485 Pulse Pulse Analog
comm. Train Train input
output input
Description
For frequency command,
32 kHz max.
Common is [L]
27 VDC max.
For frequency command,
2 kHz max.
Common is [PLC]
Section 4-7
AM H O OI L
4 to 19.6 mA DC,
4 to 20 mA nominal

3 2 1 L PLC P24
Short bar
L AM CM2 12 11
Analog Logic
output output
Ratings
251