Technical data

Active components
4.3 Active components for connecting two PROFIBUS networks
PROFIBUS Network Manual
88 System Manual, Edition 04/2009, C79000-G8976-C124-03
Ordering data Order no.
PROFIBUS OLM/G12 EEC
Optical link module with 1 x RS 485 and 2 x glass fiber-optic interface (4 BFOC
sockets), for standard distances up to 3,000 m, for extended temperature range
–20 °C to +60 °C, with signaling contact and measuring output
6GK1 503-3CD00
PROFIBUS OLM/G11-1300
Optical Link Module with 1 x RS485 and 1 x glass FO interface, for long
distances, with signaling contact and measurement output
6GK1 503-2CC00
PROFIBUS OLM/G12-1300
Optical Link Module with 1 x RS485 and 2 x glass FO interface, for long
distances, with signaling contact and measurement output
6GK1 503-3CC00
Compatibility with predecessor versions
In mixed operation with SINEC L2 Optical Link Modules SINEC L2FO OLM/P3, OLM/P4,
OLM/S3, OLM/S4, OLM/S3-1300 and OLM/S4-1300 with OLM V4.0, the functional
compatibility must be enabled on the OLM V4.0 (DIL switch).
Enable functional compatibility only when the OLM V4.0 is used as a replacement or
expansion device in existing networks with SINEC L2FO OLMs and a direct optical link is
required. To interconnect OLM V3 and OLM V4.0, the functional compatibility must be
disabled because these devices are compatible with each other.
Further information
You will find more detailed information on the OLM in the IK PI catalog and on the Internet
(
http://support.automation.siemens.com/WW/view/en/24164176).
4.3 Active components for connecting two PROFIBUS networks
4.3.1 DP/DP coupler
Area of application
The PROFIBUS DP/DP coupler is used to link two PROFIBUS DP networks together. Data
(0 to 244 bytes) is transmitted from the DP master of a first network to the DP master of
another network and viceversa.
This principle corresponds to the hardwiring of inputs and outputs. The coupler has two
independent DP interfaces via which the connection to the two DP networks is established.
The DP/DP coupler represents a slave in each DP network. Data is exchanged between the
two DP networks by copying internally in the coupler.