Replacing The Module - Toshiba MD911 Instruction Manual

Chapter 2 Installation and Wiring
2.3

Replacing the Module

The MD911 module can be replaced while the system is energized or not
energized.
When replacing them while the system is energized, set the maintenance switch to
the up (MAINT) position for the MD911 module.
For the MD 911, remove the MODBUS transmission cable (MODBUS cable:
RS485, RS232 cable) from the module.
Loosen the fixing screw on the top of the module, and rotate the module
downward to pull it off.
Upon replacement, note the following.
・ Make sure that the replaced module is the same model.
・ Set the hexadecimal rotary switch and 4-bit dip switch to the same setting as
・ After installing the module, set the maintenance switch to the down (RUN)
・ If the module does not start by setting the switch to the down (RUN) position,
14
6F8C1399
the module before replacement.
position.
set it to the up (MAINT) position once, and set it to the down (RUN) position
again.
Before touching the module or inserting or
removing the transmission cable, wear a
CAUTION
wrist strap and white cotton gloves.
Ground the wrist strap to remove static
electricity.
Otherwise, it may cause damage or failure of the module.
When placing the module during
replacement, use a conductive mat.
CAUTION
Ground the conductive mat.
Otherwise, it may cause damage or failure of the module.
Mandatory
Mandatory