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Distributed Control Systems Configurations
This section gives guidance for configuration in a DCS application. Figure 34 gives two
generalized drawings that cover DCS applications to ensure switch safety.
Wiring Option #1
Wiring Option #2
Figure 34 - DCS Switches Wiring Options
Configuration Considerations
o
A typical value for 24AWG cable about 0.025 Ohm/ft (see Wiring Option #1)).
o
If IS barrier is a combination of fuse, resistor and Zener diode then the connection
is shown in Option #2. The barrier must have adequate resistance to limit inrush
current, as the fuse cannot limit inrush current (see Wiring Option #2).
