Omron RX User Manual page 35

Terminal
Terminal name
symbol
TH External thermistor
input Terminal
Slide Switch (SW1) Settings
The built-in slide switch is used to enable or disable the emergency shutoff function. (Factory
Default: Disabled)
* For the location of the slide switch, refer to (page 2-12).
Emergency Shutoff Function (Factory Default: Disabled)
•This function is intended to turn off the Inverter output (stop switching the main element) via only
the multi-function input terminal of the hardware circuit without going through the CPU software.
* This function stops switching of the main element.The circuit is not electrically turned off. While the
power supply is ON, do not touch the Inverter terminals and power cable (e.g. motor cable). Doing
so may result in electric shock, injury or ground fault.
•When this function is enabled, the multi-function input terminals 1 and 3 are exclusively used for
this function. No other function can be allocated to these terminals. If another function has been
allocated, it will automatically be disabled, and terminals 1 and 3 are changed to the emergency
shutoff terminals.
Function of multi-function input terminal 1
Reset signal (RS) / NO contact (Fixed)
This signal is used to reset the Inverter, and to reset the emergency shutoff trip [ E37.* ].
Function of multi-function input terminal 3
Emergency shutoff signal (EMR) / NC contact (Fixed)
This signal is used to turn off the Inverter output without using the built-in CPU.
With this signal input, the Inverter activates an emergency shutoff trip [ E37. * ].
* If multi-function input terminal 3 has not been connected or disconnected, or if the signal logic is
not matched, the Inverter activates an emergency shutoff trip [E37. *]. After checking the cable
connection and the signal logic, input the reset signal (RS).
Emergency shutoff trip [ E37. * ] can be reset only by the reset signal (RS) via multi-function input
terminal 1. (It cannot be reset with the Digital Operator.)
•To enable this function, set the slide switch SW1 lever in the Inverter to [ON].
(With the factory default setting, slide switch SW1 is [OFF]. [This function is disabled.])
Description
Connect an external thermistor to this terminal,
to trip the Inverter when a temperature error
occurs.
The PLC terminal functions as the common
terminal.
[Recommended thermistor characteristics]
Allowable rated power: 100 mW min.
Impedance at temperature error: 3 kΩ
Temperature error detection level is adjustable
between 0 and 9999 Ω.
2-2 Wiring
Specifications
Allowable input
voltage range
0 to 8 V DC
[Input circuit]
8 V DC
10 kΩ
TH
1 kΩ
Thermistor
PLC
2-10
2