Rockwell Automation 61C544A RTD Module - Manual (Page 9)

2Ć1
2.0 MECHANICAL/ELECTRICAL
DESCRIPTION
The following is a description of the faceplate LED, field termination
connectors, and electrical characteristics of the field connections.
2.1 Mechanical Description
The input module is a MultibusĆcompatible printed circuit board
assembly that plugs into the backplane of the DCS 5000/AutoMax or
AutoMate rack.
It consists of a printed circuit board, a faceplate, and a protective
enclosure. The faceplate contains tabs at the top and bottom to
simplify removing the module from the rack. On the back of the
module are two edge connectors that attach to the system
backplane. Module dimensions are given in Appendix A.
The faceplate of the module contains two 37Ćpin female DĆshell
connector sockets labeled Ch.0Ć7" and Ch.8Ć15". See figure 2.1.
RTD input signals are brought into the module via two 5Ćfoot
multiĆconductor cable assemblies. The 37Ćpin male DĆshell connector
end of the cable attaches to the faceplate connector, while the 37Ćpin
female DĆshell connector end of the cable attaches to the male
connector on the terminal board assembly (M/N 61C545 or
M/N 61C546). ScrewĆtype connectors on the terminal board
assembly provide for easy field wiring.
The module faceplate also contains a green LED labeled OK". This
LED is on when the module has passed its powerĆup diagnostics and
is operating properly.