EIA-423

EIA-423

(communications, standard)
(Formerly "RS-423") An EIA serial line standard which specifies single ended communication. The mechanical connections for this interface are specified by EIA-449. Although it was originally intented as a successor of EIA-232 it is not widely used. The EIA-232 standard has its limits at 20kbps and 1.5m. EIA-423 can have a cable lenght of 1200m, and achieve a data rate of 100Kbps. When no data is being transmitted, the serial line is at a logical zero (+3 to +15 Volts). A logical one is represented as a signal level of -15 to -3 Volts. In practise, one often finds signals which switch between nominally +4.5 and +0.5 Volts. Such signals are large by modern standards, and because the impedance of the circuits is relatively high, the allowable bit rate is modest. The data is preceded by a start bit which is always a logical one. There may be seven or eight bits of data, possibly followed by an even or odd parity bit and one or two stop bits. A "break" condition is a continuous logical one on the line which is what would be observed if nothing was connected.

Comparing EIA-422, 423, 449 to RS-232-C. Details on RS-232, 422, 423 and 485.
References in periodicals archive ?
Prices of natural gas delivered to the electric power sector through 2007 are derived from data reported on FERC Form- 423, "Monthly Report of Cost and Quality of Fuels for Electric Power Plants"; Form EIA-423, "Monthly Cost and Quality of Fuels for Electric Plants Report"; and their predecessor forms.
Prices of natural gas delivered to the electric power sector are derived from data reported on Form FERC-423, "Monthly Report of Cost and Quality of Fuels for Electric Power Plants," and Form EIA-423, "Monthly Cost and Quality of Fuels for Electric Plants Report.
The electric power industry surveys through 2007 are: for price data, the Federal Energy Regulatory Commission (FERC) Form 423, "Monthly Report of Cost and Quality of Fuels for Electric Plants," filed by fossil-fueled electric utilities; and Form EIA-423, "Monthly Cost and Quality of Fuels for Electric Plant Report," filed by fossil-fueled nonregulated electric power generators; for consumption data, Form EIA-906, "Power Plant Report," filed by electric power producers, and Form EIA-920, "Combined Heat and Power Plant Report," filed by combined heat and power producers.
Monthly prices of natural gas to the electric power sector through 2007 are calculated from data reported on FERC Form 423, "Monthly Report of the Cost and Quality of Fuels at Electric Plants," and on Form EIA-423, "Monthly Cost and Quality of Fuels at Electric Plants Report.
Prices of natural gas delivered to the electric power sector through 2007 are derived from data reported on FERC Form 423, "Monthly Report of Cost and Quality of Fuels for Electric Power Plants"; Form EIA-423, "Monthly Cost and Quality of Fuels for Electric Plants Report"; and their predecessor forms.
The electric power industry surveys through 2007 are: for price data, the Federal Energy Regulatory Commission (FERC) Form 423, "Monthly Report of Cost and Quality of Fuels for Electric Plants," filed by fossil fueled electric utilities; and Form EIA-423, "Monthly Cost and Quality of Fuels for Electric Plant Report," filed by fossil fueled nonregulated electric power generators; for consumption data, Form EIA-906, "Power Plant Report," filed by electric power producers, and Form EIA-920, "Combined Heat and Power Plant Report," filed by combined heat and power producers.
The electric power industry surveys are the Form EIA-906 filed by a sample of electric power generators, the Form FERC-423 filed (for price data) by fossil-fueled electric utilities, and the Form EIA-423, filed by nonregulated electric power generators.
Prices of natural gas delivered to the electric power sector through 2007 are derived from data reported on FERC Form-423, "Monthly Report of Cost and Quality of Fuels for Electric Power Plants"; Form EIA-423, "Monthly Cost and Quality of Fuels for Electric Plants Report"; and their predecessor forms.
Monthly deliveries and prices of natural gas to the electric power sector through 2007 were reported on the Form EIA-906, "Power Plant Report"; Form EIA-920, "Combined Heat and Power Plant Report"; Form FERC 423, "Monthly Report of Costs and Quality of Fuels for Electric Plants"; and Form EIA-423, "Monthly Cost and Quality of Fuels for Electric Plant Report.