BS 6556-2:1985
Withdrawn
A Withdrawn Standard is one, which is removed from sale, and its unique number can no longer be used. The Standard can be withdrawn and not replaced, or it can be withdrawn and replaced by a Standard with a different number.
Low speed digital signals for use in coal mines Specification for transformer coupling
Hardcopy , PDF
English
31-01-1985
22-05-2026
Foreword
Committees responsible
Specification
1 Scope
2 Definitions
3 General conventions
4 Data link configurations
5 Channel allocation
6 Data rate
7 Modulation parameters
8 Line spectrum
9 Modulator
10 Demodulator
11 System performance
12 Cable connections
13 Environment
14 Line circuit parameters
15 Marking
Appendix
A Cable parameters used for system performance test
Tables
1 Manner of modulator operation
2 Manner of demodulator operation
3 Performance tests
Figures
1 Simplex operation
2 Duplex point-to-point operation
3 Multi-drop operation
4 Resistive node
5 Frequency shift keying (FSK)
6 Originate channel spectrum limits
7 Answer channel spectrum limits
8 Modulator configuration
9 Demodulator configuration
10 Performance test configuration
11 Generator of 511 bit pseudo-random data
12 Core configuration of cable
Defines electrical input and output characteristics of intrinsically safe transmitting and receiving circuits forming a low speed digital data transmission link in which data is transmitted using frequency shift keying techniques
| Committee |
W/-
|
| DevelopmentNote |
Supersedes 82/76935 DC, 88/70377 DC and 90/81014 DC (09/2005) Reviewed and confirmed by BSI, January 2011. (12/2010)
|
| DocumentType |
Standard
|
| Pages |
22
|
| PublisherName |
British Standards Institution
|
| Status |
Withdrawn
|
| Supersedes |
Withdrawn:This standard is no longer used
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