Title :
Cable characteristics for FieldBus
Author :
Anderson, Stephen D.
Author_Institution :
ANSCO Inc., Minneapolis, MN, USA
Abstract :
FieldBus, an emerging instrument standard, provides data communication among low-power field instruments. The standard specifies a low-speed data rate, under 100 kb/s using single- and multiple-twisted-pair cables at distances up to 1900 m. The intent is to allow FieldBus instruments to be retrofitted to installed cable currently used with low-frequency, analog-signaling instruments. FieldBus represents a new application for this cable. The cable parameters of importance to data communication, attenuation and phase constants, characteristic impedance, and crosstalk, have been measured in the range of 1 kHz to 100 kHz for a group of 15 representative cables, and the results are presented. A compromise terminator that approximates the cable characteristic impedance in the measured frequency range is proposed
Keywords :
data communication equipment; network interfaces; standards; telecommunication cables; 1 kHz to 100 kHz; 1900 m; FieldBus; analog-signaling instruments; attenuation; characteristic impedance; crosstalk; data communication; instrument standard; low-power field instruments; phase constants; Attenuation measurement; Communication cables; Communication standards; Crosstalk; Data communication; Field buses; Frequency measurement; Impedance measurement; Instruments; Phase measurement;
Conference_Titel :
Instrumentation and Measurement Technology Conference, 1992. IMTC '92., 9th IEEE
Conference_Location :
Metropolitan, NY
Print_ISBN :
0-7803-0640-6
DOI :
10.1109/IMTC.1992.245067
