Siemens SIMATIC NET PROFIBUS manual Mounting the modules, Mounting on a hat rail

4 Setting Up 4.4 Installation

4.4.2 Mounting the modules

Locking slide

Fig. 7: Mounting a module on a standard hat rail

61.2 mm
PROFIBUS OLM
System		mm
CH 2 CH 1 CH 2 CH 3
CH 3
Receive	mm	40.6
Signal
Intensity
GND
Ø 3 mm	81.2
CH 1
Toothed washer	Ø 3 mm

The OLM modules can either be mounted on a 35 mm hat rail in accordance with DIN EN 50022 or directly on to a flat surface.

Install the device in a location where the climatic and mechanical limit values defined in the Technical Data can be complied with.

Ensure that there is sufficient room to connect the bus and power supply cabling.

Connect the optical fiber line before mounting the module. This is easier than connecting it after the module has been installed.

Only mount the module on a low-impedance and low-induction grounded hat rail or base plate. No other grounding measures are required.

Mounting on a hat rail

Hang the top snap-in hooks of the module into the hat rail and press the underside onto the rail (as shown in Fig. 7) until it audibly clicks in.

To remove the module, pull down on the locking slide.

Mounting on a mounting plate

The modules have three through-holes. This allow it to be mounted on any flat surface, e.g. on the mounting plate of a switch cabinet.

Drill three holes in the mounting plate corresponding to the drilling template in Fig. 8.

Secure the modules with machine bolts (e.g. M 3 x 40).

Ensure that there is a reliable electrical connection between the module housing and the mounting plate. Place toothed washers under the bolt heads to pierce the varnish.

Fig. 8: Mounting a module on a mounting plate

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