Multi-pin Connectors for use on FMC front panels
Requirements
The connector type for a multi-pin connector for use on FMC cards has the following requirements:
- Must be a standard
- PCB mounted connector 9.5mm height max. Up to 40mm width preferred
- Lock or thumbscrew mechanism to fix cable to connector
- Halogen-free cable (a hard CERN requirement)
- Twisted pairs, 10 or more
- also available in an individually shielded version (twinax) to be able to use in sensitive analog applications
Possible solutions
Wikipedia
CameraLink -- 26-pin connector
- 11 individually shielded twisted pairs (twin-ax pairs)
- 4 shield connections
- Cable assembly fixed to connector with screws
- Example of a non-halogen-free cable.
- Remark: let us know if you are interested in participating in purchasing a large quantity of halogen-free cables.
- Vendors
-
3M
- Issues to obtain this cable in a halogen-free version.
- Have at CERN samples of
- 14T26-SZLB-0LC High-speed MDR cable assembly (add a '-' at end of link in browser: wikis problem)
- N10226-5215-PC MDR connector 26p., Boardmount Thru-Hole Right Angle (about 36mm wide)
- Special productions may have 13 individually shielded twisted pairs.
- No flat-cables for this connector exist (3M, 16/7/10).
- Clips-shells are preferred by 3M. Camera link standardises on fixing shells with screws.
- Minimum order quantity prohibits us from buying from 3M.
-
Cicoil
- Halogen-free, LSZH.
- Special: flatcable.
- Loram Cable Connection - Erik asked if can be halogen-free (July 2010).
-
OCP (is
Specialty
cables)
- Can build custom version in LSZH.
- Recommends thumbscrew version as is much more secure.
- No quote received (November 2010)
-
Northwire
- Can produce cables with outer jacket in LSZH.
- Standard cables are flame retardant, but not halogen-free.
- Can produce cables using 13 twinax pairs.
- Erik has received a sample of standard cable and a quote (August 2010).
- Order DAI 4506792 (CERN only, November 2010)
-
Technical Cable
Concepts.
- Received quote for special LSZH assembly (14/9/10).
-
3M
Not retained possibilities
-
OpenLDI
- OHR thread on http://lists.ohwr.org/sympa/arc/fmc-dio-16chttla/2010-03/msg00000.html
- not easily available, outdated standard.
-
VHDCI
- Not available in halogen-free.
- Cheap (30$ for 2 meters long cable), standard & popular
- 34 twisted pairs with overall shielding. Not individually shielded.
- small connector with mounting screws
- not sure if cable with individually shielded pairs is easily available (besides the National Instruments: NI high performance cables)
- PCI Express cable
- PCI-SIG standard
-
PCI Express
® External Cabling Specification - CERN only - Only overall shield (see section 6.3 of the specification)
- Likely not available in halogen-free
Erik van der Bij, Maciej Fimiarz - 15 November 2010.