Specifications

38 Chapter 8 DataFire® 2000 sync adapter
Cabling information
Each Digi-provided cable has a 68-pin Ultra SCSI connector on one end,
which attaches to a port on the Universal Interface Bus. The other end of
the cable will provide signals according to the interface standards.
Each port on the SYNC 2000 adapter can be configured to use any one of
several cables. Cables are available as V.35, EIA-530/EIA-422, X.21, and
EIA-232/V.28. The cable type is automatically detected by the
Universal Interface Bus.
If you require multiple cables of one type, you may order additional cables
from Digi. To extend the length of a Digi cable, use standard interface
cabling between the end of Digi's cable and the peripheral.
Recommendations
• Digi recommends shielded cables (15 pF or less capacitance per
foot) for all installations.
• The FCC requires the use of shielded cables to comply with
EMI/RFI emission limits. In addition, cables that run long distances
or through electrically noisy areas are subject to voltage surges that
can cause data errors or equipment damage. EIA-232 specifies a
maximum cable length of 50 feet. If you run cables farther than 50
feet, you increase the risk of surge damage and data loss.
(However, using shielded cable of 10-15 pF capacitance per foot
lessens the risk of data errors somewhat.)
• When routing cables, do not run them parallel to AC wiring or on top
of fluorescent light ballasts.
• Bundling several EIA-232 cables is acceptable.