Procedure For Commissioning; Installation - Siemens SIMATIC NET PG PROFIBUS Operating Instructions Manual

Commissioning

5.1 Procedure for commissioning

5.1 Procedure for commissioning
Commissioning the PROFIBUS OBT involves the following steps:
● Mounting the PROFIBUS OBT;
● Connecting the power supply;
● Connecting the optical bus cables;
● Connecting the electrical RS-485 bus cable.
5.2

Installation

Mounting the PROFIBUS OBT
The PROFIBUS OBTs can be mounted either on a 35 mm DIN rail with a height of 15 mm
according to DIN 50 022 - 35 x 15 or directly on a flat surface.
1. Install the device so that the climatic limit values in the technical specifications are
adhered to.
2. Make sure that there is adequate space to connect the bus and power supply cables.
3. Mount the modules only on a rail or mounting plate that is grounded with low resistance
and inductance. When securing the module to a mounting plate, run a cable from the
grounding terminal of the OBT to the nearest possible ground, keeping the cable as short
as possible.
Mounting on a DIN rail
Fit the upper catch of the module over the DIN rail and push in the lower part of the module
as shown in Figure 5-1 until it clicks in place.
To remove the module, pull down the locking lever.
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PROFIBUS Optical Bus Terminal (OBT)
Operating Instructions, 04/2016, C79000-G8976-C122-07