M Series AC Servo
User Manual
169
Rev. 1.0
7/31/2019
400-820-9661
11. STO function
11.1 Operation and maintenance procedures
11.1.1 The replacement of components
The replacement of components with a limited life is different , Disassembling for inspection and repair
should be carried out only by authorized dealers or service company. The Components as following:
Components Standard replacement cycles /year
motor
Life time varies depending
on working conditions.
Drive
Life time varies depending
on working conditions.
Connector kit
Life time varies depending
on working conditions.
STO terminal
Life time varies depending
on working conditions.
11.1.2 Prevent hazardous event
Even while the STO function is working, the following potential safety hazards exist.
Check safety in risk assessment. The actions and constraints necessary to prevent an unsafe and /or
reduce the consequences of a hazardous event, including:
1.) The motor may move when external force (e.g. gravity force on vertical axis) is exerted on it. Provide
an external brake, etc.,
2.) The STO turns off the current to the motor but does not turn off power to the servo driver and does
not isolate it. When starting maintenance service on the servo driver,turn off the driver by using a different
disconnecting device.
3.) When using STO function, connect equipment conforming to the safety standards.
4.) Do not touch the motor axis when working .
11.1.3 Maintenance procedures of STO faults or failures
According to user manual instructions, you can do some maintenance, if the customer find STO safety
malfunctions or failure, please contact your local MOONS
’
customer representative.
11.1.4 Commissioning and testing
The STO Terminal block is MOONS
’
standard plug, generally do not pull out from the drive.
For connection to the host controller control the STO function, please use the appropriate connector or
consulting MOONS
’
customer representative.
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