Siemens SIMATIC NET OLM12M Description And Operating Manual page 52

6ZB5530–3AB00–0BA0/01
The distance between two modules connected by fiber-optic cables is shown in the table below.
Fiber Type
Plastic cable
980/1000 µm
with maximum 200 dB/km path attenuation
HCS cable
200/230 µm
with maximum 10 dB/km path attenuation
Table 1: Distances Between Two OLM12M Modules Connected by Fiber-Optic Cable
The connectors required to connect the plastic FO cable are supplied. With HCS , preassembled
cables, cables sold by the meter, and connector attachment tools are available.
The following maximum RS 485 segment lengths can be implemented on channel 1 with SIMATIC
NET PROFIBUS cables:
Transmission Rate
in Kbps
187.5
500
1500
12000
Table 2: Maximum Possible Length of the RS 485 Bus Segments on Channel 1
Using a signaling contact (relay with floating contacts), various errors/faults on the modules can be
signaled, for example to a control room.
The module is constructed as a compact, stable metal casing that can be installed either on a
standard rail or on any other flat surface.
For the standard application, no adjustments are necessary when installing the module. For special
applications, the module is configured with a maximum of ten easily accessible switches.
Copyright Siemens AG 1997
Segment Length for Cable Type
– LAN cable
– LAN cable with PE sheath
– Underground cable
800 m
400 m
200 m
100 m
3
SIMATIC NET OLM12M
Distance Between Two OLM12M Modules
0.1 m to 50 m
0 m to 300 m
– Trailing cable
– LAN cable for festoons
700 m
400 m
200 m
100 m