Distributed Control Systems (DCSs)

DOE-HDBK-1132-99

maintenance considerations;

aesthetics;

lighting methods and intensities;

control center location relative to the rest of the plant;

control center access and egress pathways;

security and safety considerations;

office and utility room requirements;

computer room;

software engineering area;

ambient noise levels and abatement devices;

HVAC requirements-ambient temperature, air quality, and humidity;

fire protection requirements;

wiring methods and requirements (including fiber optics);

static electricity discharge requirements;

grounding requirements;

essential documents storage and reference area;

electromagnetic compatibility;

human factors/ergonomics (see IEEE-1023, ISA RP60.3);

power requirements.

To increase the reliability of control systems, redundancy of primary control system

components (power supplies, controllers, input/output modules, communication lines,

etc.) should be considered. Facility failure studies can be useful in defining control

system redundancy needs.

Distributed Control Systems (DCSs) . The following should be considered for

4.2

specifying or purchasing a DCS.

4.2.1

Component Modularity . System components are generally standardized,

modular, and of plug-in construction, so that any module may easily be removed

from the system and replaced without breaking or making solder-type

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