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 1. Provide sensor and control points terminated in a Data Terminal Cabinet
(DTC) for future interface with EMCS.
2. Provide backboard for future Fiel d Interface Device (FID) or Multiplexer
(MUX).
3. Locate DTC and FID/MUX in an environmentally protected area away
from extremes in temperature and humidity.
4. Provide two telephone pairs from telephone backboard to FID/MUX
backboard.
5. Provide a communications interface compatible with the EMCS on projects
that utilize a Direct Digital Control (DDC) system.
4.8.3 INSTRUMENTATION AND CONTROL SYSTEMS
a. Describe the demolition of any existing Instrumentation and Control System
(I&CS) to be removed. Identify any equipment to be salvaged. Identify any equipment
to be relocated or reused.
b. Describe the overall process to be controlled, and the overall control philosophy.
Indicate the control system inputs from the process, and the control system outputs to the
process. Describe the process sensors and signals; and describe the control system
signals and actuating devices. Describe the control algorithms to be implemented.
Provide a general sequence of operations. Indicate a typical func tional diagram for
control of the major processes; similar to a Scientific Apparatus Makers Association
(SAMA) diagram or a function blockware diagram.
c. Describe the control equipment signal processing scheme, i.e., electric analog or
digital; single p rocessor or distributed processors; programmable logic controller based;
personal computer based; single loop controller based; multi -loop controller based; or
mini -computer based. Indicate the expected update frequency for critical, typical, and
non-critical data points in the system. Indicate the expected end -to-end control accuracy.
d. Describe the hard -wired control logic scheme; provide a typical ladder logic
diagram to illustrate the method to be used on the contract drawings.
e. Describe the control programming scheme; ladder diagram logic (preferred),
function block logic (acceptable). Provide a typical diagram to illustrate the method to be
used on the contract drawings.
f. Describe the control program development system input/output and st orage
device(s); describe the control program development tools to be provided, both hardware
and software.
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