Siemens SIMATIC NET PROFIBUS Betriebsanleitung PDF herunterladen (Seite 33)

Product Characteristics

4.2 Installation

SIMATIC NET PROFIBUS Optical Link Module OLM V4.0

Operating Instructions, 01/2013, C79000-G8976-C270-03

Figure 4-2 Minimum cable length for use of plastic fiber S 980/1000 without fixed attenuator

4.2.3.7 DIL Switches S5 / S6 in OLM / G11-1300 and OLM / G12-1300

In OLM V4 devices for glass FOC (1300 nm), the DIL switches S5 and S6 do not have a

function (reduction of optical transmit power not possible). Nevertheless, if the OLM V4 is

used along with OLM V3 G11-1300 or OLM V3 G12-1300 devices, the DIL switches S6 and

S5 of the OLM V3 must be set to "0" in order to avoid interference due to the internal design

of the OLM V3 devices.

4.2.3.8 Mixed operation of OLM V4 with OLM V2 (SINEC L2FO)

If OLM V4 modules are used along with OLM V2 (SINEC L2FO) modules, the bus

terminating resistors for the second RS-485 port must be activated on the OLM V2 if the port

is not used. This is done by setting DIL switches S3 and S4 (termination) to ON.

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Siemens SIMATIC NET PROFIBUS Betriebsanleitung Seite 33