Chapter hvac engineering Fundamentals: Part 1 Introduction

Design Procedures: Part 6
281
Figure 8.63
Field interface device.
is ‘‘intelligent’’ (IFID); i.e., it contains a microcomputer and can make
many of the decisions otherwise made at the central console. This
minimizes traffic on the communication link and results in what is
called
distributed intelligence.
The general arrangement of an IFID is
shown in Fig. 8.63. The most important activity of the IFID is
signal
Design Procedures: Part 6
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