IS 12746 : Part 3 : 1995/IEC PUB 870-3 : 1989 Telecontrol equipment and systems:Part 3 Interfaces (Electrical Characteristics)
| UDC 621.398 : 681.327.8 | LTD 10 |
|
| Reaffirmed 2023 |
NATIONAL FOREWORD
This Indian Standard (Part 3) which is identical with lEC/Pub870-3 : 1989 `Telecontrol equipment and systems : Part 3 Interfaces(electrical characteristics)', issued by the InternationalElectrotechnical Commission (IEC), was adopted by the Bureau ofIndian Standards on the recommendation of the Power Line CarrierSystems and Associated Telecontrol Equipment Sectional Committee(LTD 25) and approval of the Electronics and TelecommunicationDivision Council.
The text of the IEC standard has been approved as suitable forpublication as Indian Standard without deviation except This:
Technical Deviations
| International Standard | Corresponding Indian Standard |
| IEC Pub 50-371 : 1984 | IS 1885 : Part 50 : 1985 Electrotechnicalvocabulary :Part 50 |
| IEC Pub 495 : 1974 | IS 9482 : 1980 Characteristics values ofinputsand outputs of Angle sideband PLC terminals (withAmendment No. 1) |
| IEC Pub 625 : 1980 | IS 10767 : Part 2 : 1983 An interfacesystem forprogrammable measuring instruments (type serial,bit parallel):Part 2 Code and format conventions |
| IEC Pub 870-4 : 1990 | IS 12746 : Part 4 : 1993 Telecontrolequipment andsystems :Part 4 Performance requirements |