BS 7647:1993

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

Specifies requirements and type tests for radio teleswitches used for the remote switching of up to four circuits (such as the control of two tariff circuits and a water and space heating circuit).