Yamatake Corporation
Installation
Model HGC303 - Heat Value Gas Chromatograph
2-13
Terminators
A terminator is an impedance matching module used near or at the end of a transmis-
sion line. Terminators prevent distortion and signal loss.
A terminator shall be located at both ends of a trunk cable, connected from one signal
conductor to the other.
A trunk is the longest cable path between any two devices on the fieldbus network.
ONLY TWO terminators are required per fieldbus segment.
No connection shall be made between the terminator and cable shield.
The terminator impedance value shall be 100 ohm +/- 2% over a frequency range of
7.8 kHz to 39 kHz.
The model HGC303 and model HMU303 have a terminator at the fieldbus connection
port therefore an additional terminator is not required.
Terminal blocks
The terminal blocks can be the same as those used for 4-20mA.
Connectors
D-sub 9P connector is as specified for standard fieldbus connectors in the IEC/ISA
Standard.
Contact No.
Signal
6
Data +
7
Data -
Summary of Contents for HGC303
Page 10: ...Safety Yamatake Corporation viii Model HGC303 Heat Value Gas Chromatograph ...
Page 42: ...Installation Yamatake Corporation 2 22 Model HGC303 Heat Value Gas Chromatograph ...
Page 110: ...Operation Yamatake Corporation 3 68 Model HGC303 Heat Value Gas Chromatograph ...
Page 112: ...Maintenance Yamatake Corporation 4 2 Model HGC303 Heat Value Gas Chromatograph ...
Page 127: ...Yamatake Corporation Appendix Model HGC303 Heat Value Gas Chromatograph A 13 Drawings HGC00 ...
Page 128: ...Appendix Yamatake Corporation A 14 Model HGC303 Heat Value Gas Chromatograph ...