Siemens Simatic RTU303xC Series Operating Instructions Manual page 71

Installation of the rack
Horizontal installation of the rack (DIN rail)
Vertical installation of the rack (DIN rail)
Installing the RTU
Note
Protecting the battery modules from slipping on the DIN rail
When mounting in the protective housing that can be ordered as an accessory, there are two
end retainers that are fitted to both ends of the group of devices. The end retainers prevent
the RTU and battery module from separating under mechanical load.
If you do not mount the RTU or the battery module in a protective housing from the
accessories program, prevent the battery module from slipping with a suitable clamping
device, e.g. a Siemens end retainer 8WA1808.
When using the device in the areas of application ATEX or IECEx, note the information on
the DIN rail being used in section Notices on use in hazardous areas according to ATEX /
IECEx (Page 63).
● If you use a battery module, start at step 1.
● If you do not use a battery module, start at step 3.
RTU303xC
Operating Instructions, 06/2019, C79000-G8976-C382-06
Connecting up, installation, commissioning
Installation position of the RTU
3.5 Installing an RTU
71