Standard
Fiber Optical Transceiver RS-232/422 D-sub
- Wavelength
- 1310 nm
- Connector
- SC
Product no 60-00-7753 (21-215)
Public sector
Railway signalling installation
Vibration and a 40-year installation lifetime set the requirements, not the data rate.
- Area
- Fiber & OT
- Architecture patterns
- 2
- Products used
- 1
The problem
What makes it hard
The 15 kV 16.7 Hz contact line and the return current in the rails create an electromagnetic environment and earth potential differences along the track that make copper between interlockings and objects unsuitable. Fiber in the containment along the track is the standard carrier.
How it is built
Galvanic barrier and cross-connect inside the site
Where the isolation boundary sits is a design decision, not an installation detail.
See the full patternIn the catalogue
Equipment from the catalogue
Built from: Fiber Optical Transceiver RS-232/422 D-sub 60-00-7753 (21-215).
Reading and references
Explained in
Named customer references are not published. What we can show is the solution area this environment belongs to, and the reasoning behind the design.
Environments
Environments with the same problem
The technology is the same; the buying process usually is not.
- Link between buildings over public landThe operator’s later cross-connects eat your budget after handover, which is why the acceptance measurement matters.
- Vehicle and vessel installationThe rugged data diodes carry 810G and 461 data; no converter, extender or switch in the catalogue does.
- Substation with teleprotectionDelay and channel asymmetry decide whether the protection trips correctly — the link is part of the protection scheme, not a service to it.
- Process industryGround potential differences across a site are what break copper, and what fiber removes.
Next step
Describe your environment
If yours is close to this one but not the same, that difference is usually where the design decisions are. Tell us what it looks like.
Verified credentials
All certifications- ISO 9001 14001ISO certifiedQuality & environmentDownload certificate (JPG)
- Made in SwedenDesigned & built in StockholmSecure supply chain
- NATOCertified TEMPEST supplierSDIP-27 · Level A & B
- Swedish Armed ForcesM-numbered equipmentMain supplier, Total Defence
- Government of SwedenSupplier to Swedish authoritiesPolice · FMV · FOI
- SOFFDefence industry memberExport control frameworks
