VXi VT1422A 사용자 설명서

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Field Wiring   35
Chapter 2
Field Wiring
About This Chapter
This chapter shows how to plan and connect field wiring to the VT1422A's 
Terminal Module. The chapter explains proper connection of analog signals 
to the VT1422A, both two-wire voltage type and four-wire resistance type 
measurements. Connections for other measurement types (e.g. strain using 
the Bridge Completion SCPs) refer to the specific SCP manual. Chapter 
contents include:
Planning the Wiring Layout
The first point to understand is that the VT1422A makes no assumptions 
about the relationship between Signal Conditioning Plug-on (SCP) function 
and the position in the VT1422A that it can occupy. Any type of SCP can be 
placed into any SCP position. There are, however, some factors which should 
be considered when planning what mix of SCPs should be installed in each 
of the VT1422As. The following discussions will help explain and clarify 
these factors.
SCP Positions and
Channel Numbers
The VT1422A has a fixed relationship between Signal Conditioning Plug-on 
positions and the channels they connect to. Each of the eight SCP positions 
can connect to eight channels. Figure 2-1 shows the channel number to SCP 
relationship.