RTC
®
5 PC Interface Board
Rev. 1.9 e
4 Layout and Interfaces
44
4.3.3 Data Cable (Optional)
For transmission of the data signals between the
RTC
®
5 (or the XY2-100 converter) and the scan
system, appropriate cables are obtainable from
SCANLAB.
For controlling SCANLAB’s scan systems equipped
with an SL2-100 interface (9-pin female D-SUB
connector), data cables are available for either elec-
trical transmission or optical fiber transmission. The
optical fiber, too, is attached via a 9-pin D-SUB
connector. Optical conversion (POF conversion) for
optical data transmission takes place in the D-SUB
connector. The operating voltage for POF conversion
is supplied at the RTC
®
5 scan head connectors and
the scan system’s digital interface.
Only electrical cables are obtainable for SCANLAB’s
scan systems equipped with a conventional XY2-100
interface (25-pin female D-SUB connector). Scan
systems equipped with an optical interface (XY2-100-
O) can’t be controlled via the RTC
®
5.
Data cables are generally not included in the
package. SCANLAB recommends the following
design (for electrical data transmission):
For SL2-100-compliant data transmission, the
cable should be fitted with 9-pin male D-SUB
connectors at both ends. The two channels
DATA IN± and DATA OUT± must consist of
twisted cable pairs and be cross-connected at
both D-SUB connectors (e.g. so that the RTC
®
5’s
DATA OUT signal flows to the scan system’s
DATA IN input). The cable length should not
exceed 25 m. SCANLAB recommends a cable
impedance of 110 , independent from the cable
length.
For XY2-100-compliant data transmission, the
cable must have identical 25-pin (male) D-SUB
connectors at both ends. The five (or six) channels
SYNC±, CHAN1±, CHAN2±, STATUS± (and
STATUS1±) and CLOCK± must consist of twisted
cable pairs. Together with a XY2-100 converter
with standard jumper configuration, the data
cable should not be longer than 10 m. If a longer
data cable is needed, then the XY2-100
converter’s solder jumpers possibly need to be
reconfigured (see "XY2-100 Converter (Optional)",
page 42). Cable lengths above 25 m are not
recommended.
The data cable must have coaxial copper braided
shielding.
The D-SUB connectors must have fully shielded
metal housings.
The electrical connection of the cable’s braided
shielding to the D-SUB housing should not be
implemented as a wire. Instead, the cable’s
braided shielding should be coaxially connected
to the D-SUB housing via shielded clamps.
For XY2-100-compliant data transmission, the
data cable’s controller end must be fitted with a
ferrite ring (e.g. Wuerth WE 742 711 32).
Figure 9 on page 45 shows the data cable layout and
pin assignments.
Some scan heads use a single connector to provide
both the power supply voltages and the data signals.
For these scan heads, SCANLAB recommends imple-
menting a cabling solution that allows the use of
separate cables for data and power. The data-section
of such a cabling solution should be designed to
accommodate the data cable shown in figure 9,
page 45.
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