American Audio VELOCITY - REV 4-05 Betriebsanleitung Seite 163

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METRO RAIL DESIGN CRITERIA SECTION 9 / SYSTEMS
Appendix A
DE304.09 Appendix 9A-2
Metro Baseline Re-Baseline: 04/20/10
the management, labor, data, design, support services, parts, materials, tools,
and incidentals necessary to complete the work in accordance with the
specification requirements in a timely, proper, thorough, skillful, and professional
manner.
PART 3 - SYSTEM FUNCTIONAL REQUIREMENTS
3.1 GENERAL RTU ARCHITECTURE
A The RTU shall be an assembly of readily available components that are
integrated together to provide telemetry and logic functions. The major
components include: subpanel, assembly power supply and distribution;
programmable logic controller, memory, input and outputs, input and output
termination facilities; and equipment cabling, and mounting for installation in
cases and enclosures.
B The RTU shall be designed to accept a range of incoming power sources.
C The RTU shall be constructed as a main assembly with the capability to add an
additional expansion IO assembly.
D The actual number and types of I/O modules shall be a site specific design
responsibility of the Contractor including but not limited to:
32-point discrete input modules
32-point discrete output modules
8-point analog current/voltage analog input module
Remote I/O controller module
E The following shall be the only actions necessary to add new modules (up to the
design maximum):
Install the new PLC I/O module and associated field interface module.
Install a PLC manufacturer prefabricated cable connection between the
module and the field interface module.
Use the manufacturer provided PLC programming software to configure
the new I/O.
F Discrete input interfaces shall typically be dry contact inputs wetted by the
assembly sensing voltage.
G Discrete control outputs shall utilize high density PLC output modules to drive
interposing relays on the assembly. Outputs shall be typically a dry contact
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