Siemens SIMATIC NET PROFIBUS - Manual (Page 402)

6 Version 1.0 8/00
1 Introduction
Table 1 shows the different methods for connecting the modules, and the maximum optical ranges of each port.
OLM/ P11 P 12 G11 G12 G11-1300 G12–1300
G12-EEC
Number of ports
– electrical
1 1 1 1 1 1
– optical 1 2 1 2 1 2
Fiber types
– Plastic optical fibers
980/1000 µm 80 m 80 m – – – –
– PCF optical fibers
200/230 µm 400 m 400 m – – – –
Quartz glass optical fibers
10/125 µm – – – – 15 km 15 km
50/125 µm – – 3 000 m 3 000 m 10 km 10 km
62.5/125 µm – – 3 000 m 3 000 m 10 km 10 km
Table 1: Number of electrical and optical ports per module, fiber types which can be used, as well as the maximum possible optical
fiber distances between two modules. See Technical Data, p. 31 for more details about ambient conditions.
PCF stands for Polymer Cladded Fiber, and is the same as HCS
®
. HCS is a registered trademark of Ensign-Bickford
Optics Company.
One measuring output is available for each optical port where the optical input level can be measured using a
conventional voltmeter.
Different OLM malfunction reports are provided as an accumulative signal via a signaling contact (relay with
unconnected contacts) for further processing.
The mechanical design consists of a compact, stable metal housing which can be mounted on a hat rail or mounting
plate as required.
The module is configured using easily accessible switches.
The PROFIBUS OLM complies with the standard EN 50170 and the technical guidelines issued by the PROFIBUS
user organization, PNO, ”PROFIBUS optical transmission technology“.
OLM/G12 und OLM/G12-EEC have the same function. They only differ in the specification of the climatic ambient
conditions: while the OLM/G12 is suitable for employment in the standard temperature range from 0°C to 60°C,
the OLM/G12-EEC (extended environmental conditions) can be used in the extended temperature range from
–20°C to +60°C and at up to 100% humidity.