A fiber optic link from an ibaM-FO-2IO module (FO transmitter) to an ibaBM-PN device (FO receiver) is used as an example.

The example only considers the transmission direction from the ibaM-FO-2IO module to the ibaBM-PN device. In actual operation, a connection from the ibaBM-PN device to the ibaM-FO-2IO module is also required.

The example refers to a P2P connection with an FO cable of type 62.5/125 µm. The light wavelength used is 850 nm.

The range of the minimum and maximum values of the output power or receiver sensitivity depends on the component and, among other things, on temperature and aging.

For the calculation, the specified output power of the transmitting device and, on the other side, the specified sensitivity of the receiving device must be used in each case. You will find the corresponding values in the relevant device manual in the chapter "Technical data" under "ibaNet interface".

ibaM-FO-2IO specification

ibaBM-PN specification

Specification FO cable

Refer to the data sheet for the fiber optic cable used:

Equation for calculating the FO budget (A_Budget):

P_Receiver = sensitivity of FO receiving interface

P_Sender = output power of FO transmitting interface

Equation for calculating the fiber optic cable length (l_Max):

A_Connector = connector loss

A_Fiberoptic = cable attenuation

Calculation for the example ibaM-FO-2IO -> ibaBM-PN in the best case:

Calculation for the example ibaM-FO-2IO -> ibaBM-PN in the worst case:

Note
	When connecting several devices as a daisy chain or as a ring (e.g., ibaPADU-S-CM with 32Mbit Flex), the maximum distance applies to the section between two devices. The FO signals are re-amplified in each device.

Note
	When using fiber optics of the 50/125 µm type, a reduced distance (by approx. 30–40%) must be expected.

Note
	In addition to conventional multimode cable types OM1 (62.5/125 μm) and OM2 (50/125 μm), the other cable types OM3, OM4 and OM5 of the 50/125 μm fiber can also be used.