Partial Shutdown Function With Extension Module - Mitsubishi Electric MELSEC Q Series User Manual

4
FUNCTIONS
4.6

Partial Shutdown Function with Extension Module

This function allows to shut off only the outputs of extension module by using safety inputs
of extension module.
By shutting off only the necessary parts, operating rate of equipment and production line
can be raised.
SW0
Safety
input
Main
module
Safety
input
M0
The following shows an operation example when the safety relay module system in Figure
4.4 is configured.
POINT
SW1 SW2
Safety Safety
Short circuit between
input input
COM and input
Extension Extension
module module
Station Station
number 1 number 2
Safety Safety
input input
M1 M2
Figure 4.4 Partial shutdown with extension module
• If SW0, safety input switch of the main module, is pressed, the whole outputs
(M0, M1, M2, M3) are shut off.
• If SW1, safety input switch of the extension module on station number 1, is
pressed, only output of the extension module (M1) is shut off.
• By shorting the safety input of the extension module on station number 3, the
safety input is synchronized with the safety output of the main module and is
driven/shut off.
The safety output of the extension module can be synchronized only with main
module: therefore; it cannot be synchronized with another extension module.
4.6 Partial Shutdown Function with Extension Module
Operation diagram
SW0
Extension
module
Station
number 3
Safety
input
M3
M0
M3
SW1
M1
SW2
M2
4
- 5
1
2
3
4
5
6