Siemens SIMATIC ET 200M

Maintenance and service
7.4 Replacing the IM 153-2 or IM 153-2 FO
ET 200M
106 Operating Instructions, 12/2008, EWA-4NEB780600602-08
IM 153-2 FO: Removing the fiber-optic cable
When you remove the FOC from the IM 153-2 FO, then all following DP slaves are also no
longer available for the DP master!
CAUTION
Do not look directly into the opening of the optical transmit diodes.
The emitted light beam could damage your eyes.
Replacing In the redundant system
Note
Always switch off the power before you replace the IM 153 -2 / -2 FO!
If you carry out a replacement in an energized state, the specified switchover times cannot
be guaranteed and the I/O modules could fail for a certain time and output "0".
If you replace the IM 153 -2 / -2 FO in a redundant configuration, the following applies:
"ACT" LED is on: "ACT" LED is off:
The IM 153 -2 / -2 FO is the active one of the two
IM 153 -2 / -2 FO.
The IM 153 -2 / -2 FO is the passive one of the
two IM 153 -2 / -2 FO.
This IM 153 -2 / -2 FO can be replaced without
performing a switchover in the ET 200M.