Mitsubishi QX10 - I;O Module with Protection Function

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MELSEC-Q
1 GENERAL SPECIFICATIONS AND PRECAUTIONS FOR USE
1.2.4 I/O module with protection function
The overload protection function and overheat protection function of the following
modules are explained below.
(1) QY40P, QY41P, QY42P, QX41Y41P, QH42P
Function Description
Common
(Overload and overheat
protection functions)
• If an overcurrent due to overload keeps flowing, heat is generated
and the overheat protection function is activated.
• The functions are provided for protecting only the circuits inside
the module.
A load error, which causes an increase in temperature within the
module, may deteriorate output elements or discolour the module
case or printed circuit board. If a load error occurs, turn off the
corresponding output immediately and eliminate the error cause.
Overload protection
function
• The overload protection function is activated in units of 1 point at
1A to 3A/point.
• The overload protection function returns to normal operation when
the load becomes a rated load.
Overheat protection
function
• The overheat protection function is activated in units of 1 point.
• The overheat protection function automatically returns to normal
operation after heat reduces.
(2) QY81P, QY82P
Function Description
Common
(Overload and overheat
protection functions)
• If an overcurrent due to overload keeps flowing, heat is generated
and the overheat protection function is activated.
• The functions are provided for protecting only the circuits inside
the module.
A load error, which causes an increase in temperature within the
module, may deteriorate output elements or discolour the module
case or printed circuit board. If a load error occurs, turn off the
corresponding output immediately and eliminate the error cause.
Overload protection
function
• The overload protective function is activated in units of 1 point at
1A to 3A/point.
• The overload protective function returns to normal operation when
the load becomes a rated load.
Overheat protection
function
• The overheat protection function is activated in units of 2 points.
(It is activated in units of 2 points of Y0/Y1, Y2/Y3, ..., and when
overheat protection is activated, 2 points of them are activated
simultaneously. If an overheat status persists, heat is conducted,
and which may activate another overheat protection function.)
• If an output turns on at the activation of the overheat protection
function, the actual output voltage oscillates between 0V and load
voltage.
A
t the load voltage of 24V, the average voltage during oscillation is
approx. 7V.
No oscillation occurs when the output is off at the activation of the
overheat protection function.
To ensure that the output is turned off at the activation of the
overheat protection function, use an external load that turns off at
7V or more.
• The overheat protective function automatically returns to normal
operation after heat reduces.