BS 7647:1993
Withdrawn
A Withdrawn Standard is one, which is removed from sale, and its unique number can no longer be used. The Standard can be withdrawn and not replaced, or it can be withdrawn and replaced by a Standard with a different number.
Specification for radio teleswitches for tariff and load control
Hardcopy , PDF
08-31-2015
English
10-15-1993
Committees responsible
Foreword
Specification
Introduction
1. Scope
2. References
3. Definitions
4. Electrical values
5. Mechanical properties
6. Climatic conditions
7. Electrical properties
8. Signal reception, signal decoding and control of
output switches
9. Electromagnetic compatibility (EMC)
10. Tests and test conditions
Annexes
A. (normative) Signal modulation and data format
B. (normative) Specification for optically isolated
diagnostic data
Tables
1. Dimensions and spacing of fixing holes and
terminals
2. Switch breaking current
3. Temperature range
4. Relative humidity
5. A.C. voltage tests
Figures
1. Dimensions and spacing of terminals
2. The two aerial positions for directional aerials
3. Relationship between ambient air temperature and
relative humidity
4. Message format
5. Switching sequence
6. Electromagnet for testing the influence of
externally produced magnetic fields
A.1 Phasor diagram of carrier modulated by data
A.2 Phase of modulated carrier as a function of time
A.3 Amplitude response of the specified transmitter
or receiver data-shaping filter
A.4 Amplitude response of the combined transmitter and
receiver data-shaping filter
A.5 Spectrum of biphase coded low frequency (LF) radio-
data signal
A.6 Time-function of a single biphase symbol
A.7 Eye pattern at the output of the specified receiver
data-shaping filter
A.8 Structure for LF radio-data blocks
A.9 Arrangement of blocks in a multiblock, relative to
clock-time
A.10 Clock-time blocks (type 0)
B.1 Diagnostic wand
List of references
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