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Mounting/Dismantling
MELSEC-WS
6. Mounting/Dismantling
This chapter describes the mounting of the modules of the MELSEC-WS safety
controller.
6.1 Steps for mounting the modules
The MELSEC-WS safety controller is only suitable for mounting in a control
ATTENTION
cabinet with at least IP 54 degree of protection.
While supply voltage is applied, modules must not be plugged to nor be removed
from the MELSEC-WS safety controller.
To ensure full electromagnetic compatibility (EMC), the DIN mounting rail must be
connected to functional earth (FE).
In a MELSEC-WS safety controller, the WS0-CPU0 or WS0-CPU1 module is
positioned at the extreme left.
The two optional network modules follow directly to the right of the CPU module.
Connect further MELSEC-WS safety I/O modules (e.g. WS0-XTIO or WS0-XTDI)
onto the right side of the network modules and any additional safety relay output
modules (WS0-4RO) to the extreme right of the entire MELSEC-WS safety
controller.
Ensure that suitable ESD protective measures are also taken during mounting.
Otherwise the FLEXBUS+ backplane bus may be damaged.
The connection between the modules is effected by means of the plug connection
integrated in the housing. Take into account that, when replacing a module, the
MELSEC-WS modules have to be pushed approx. 10 mm apart before the
corresponding module can be removed from the DIN rail.
Take suitable measures to ensure that foreign matter does not penetrate the
connector openings, in particular that of the memory plug.
Mount the modules in accordance with EN 50274.
The modules are located in a 22.5 mm wide modular system for 35 mm DIN rails
to EN 60715.
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