Protection Functions - Mitsubishi Electric MELSEC iQ-R Series User Manual

7.6

Protection Functions

This function protects the internal circuit from overvoltage or overcurrent.
The following table lists protection functions.
: Available, : Not available
Function name Purpose
Module power supply Prevents ignition or burnouts from/of the
overvoltage protection safety remote I/O module due to overvoltage
on the module power supply.
Module power supply Prevents ignition or burnouts from/of the
overcurrent protection safety remote I/O module due to overcurrent
on the module power supply.
Load power supply Prevents ignition or burnouts from/of the
overvoltage protection safety remote I/O module and load circuits
due to overvoltage on the load power
supply.
Load power supply Prevents ignition or burnouts from/of the
overcurrent protection safety remote I/O module and load circuits
due to overcurrent on the load power supply.
Output overload/short Prevents ignition or burnouts from/of the
circuit protection safety remote I/O module due to overcurrent
or overheat resulting from short-circuits of
the output circuit.
• The protection functions are intended to protect the internal circuit of a module, not to protect external
devices.
• An overload may cause the internal temperature of the module to rise, resulting in deterioration in output
elements and discoloration on the case and the printed-circuit board. When an abnormal load is found, turn
off the corresponding output immediately and eliminate the cause.
Description
This function operates when the module
power supply is in the overvoltage state.
After a voltage of 36VDC or higher applied
for 2 seconds or longer activates the
overvoltage protection, the safety state is
ensured and thus the function is disabled.
This function operates when the module
power supply is in the overcurrent state.
This function operates when the load power
supply is in the overvoltage state.
After a voltage of 36VDC or higher applied
for 2 seconds or longer activates the
overvoltage protection, the safety state is
ensured and thus the function is disabled.
This function operates when the load power
supply is in the overcurrent state.
This function operates when overcurrent
flows. The safety remote I/O module
recovers by eliminating the cause.
Target module
NZ2GFS12A2 NZ2GFS12A2
-16DTE -14DT
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7 FUNCTIONS
7.6 Protection Functions
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