American Audio VELOCITY - REV 4-05 Betriebsanleitung PDF herunterladen (Seite 127)

METRO RAIL DESIGN CRITERIA SECTION 9 / SYSTEMS

DE304.09 9-122 Revision 4 : 05/09/12

Metro Baseline Re-Baseline: 04/29/10

transmit information via an optical fiber of the fiber optic transmission link.

Sources shall be capable of operation at a data rate compatible with the type

of data transmitted.

3. All local distribution cables shall be placed in galvanized rigid steel conduit

or totally enclosed raceway. Other Materials are acceptable only for

backbone cable in main duct backs when encased in concrete or buried

under a minimum of 24 inches of cover.

4. All outside plant and tunnel metallic distribution cables shall be surge

protected at all main and subsidiary distribution frames and at all cable

terminals. Protection shall be by 3-electrode fail-short gas tube or electronic

protectors.

5. Optical Cable

All outside main backbone optical fiber cable shall be gel-filled and armored

for rodent protection. Sufficient fiber strands shall be provided to support the

CTS subsystem plus future extensions and 25% spare. Safety-critical

signals will be backed up by another independent transmission path or

means.

6. Backbone and Local Distribution - Metallic Pairs

Local CTS distribution for voice and data circuits shall be twisted pair, using

standard telephone cable color coding.

All outside plant cables shall be 22 AWG minimum, gel-filled, foam/skin

insulated conductors that meet Rural Electrification Administration (REA)

PE-89 and shall be gopher-protected. All cables shall be sized for initial

requirements plus 25%. No outside plant cable shall be less than 12 pairs.

All main riser cables shall be 22 AWG minimum, and shall meet REA PE-22

o PE-89. No cable shall be less than 12 pairs.

Inside wire from distribution terminals to instruments shall be 22 AWG

minimum, and have a characteristic impedance of 105 ohms + 15%. All

telephone instrument and jack appearances shall be served with a minimum

of three (3) dedicated pair.

All outside main and riser-paired cables shall be shielded.

REA PE-39 cables shall not be used as a substitute for PE-22 or PE-89

cables.

9.11 SUPERVISORY CONTROL AND DATA ACQUISITION

9.11.1 General

The Supervisory Control and Data Acquisition (SCADA) subsystem shall provide

supervisory control of the Train Control (TC) system, auxiliary and traction power,

the Environmental Control System (ECS), facilities, and other systems and

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American Audio VELOCITY - REV 4-05 Betriebsanleitung Seite 127