Additional Analog, Incremental Real-Time Signal (Bml-S1G0 - Balluff BML-S1G0-7-M5E-0 Serie Manual De Instrucciones

BML-S1G0-_7_ _-M5E_-_0-_ _
Absolute Magnetically Coded Position Measuring System
6
Interfaces (continued)
6.4 Additional analog, incremental real-time
signal (BML-S1G0-_ _ _ _-M5EA-_0-...)
In the document Interfaces for BML
Magnetically Coded Position Measuring
System (Doc. No. 929191) the 1Vpp-(sin/cos)
interface is described. The document is part of
this guide and must be used.
The outputs +A/–A and +B/–B must each have a load of
120 Ohms ±10 %. The outputs have the following data:
Parameters
Period length p [mm]
Tab. 6-10: Parameters for 1Vpp-(sin/cos) interface
Outputs Name in the
interface
document
+A (+sin), –A (–sin)
+B (+cos), –B (–cos) +B, –B
+Z, –Z
Tab. 6-11: Outputs for 1Vpp-(sin/cos) interface
6.5 Additional analog, incremental real-time
signal (BML-S1G0-_ _ _ _-M5EG-_0-...)
In the document Interfaces for BML
Magnetically Coded Position Measuring
System (Doc. No. 929191) the safety 1Vpp (sin/
cos) interface is described. The document is
part of this guide and must be used.
BML sensors with the G-interface may be used in safety
applications up to Safety Integrity Level 2 (SIL 2) per
EN 61800-5-2 / EN 62061 / IEC 61508 and Performance
Level d (PL d) per EN ISO 13849-1.
The sensors provide the safety function safe incremental
value. Here safe processing and transmission of the
incremental rough position information of the measuring
system is implemented via the analog sine/cosine
interface. For safety applications which use the function
safe incremental value only the rough position obtained
from the quadrant detection of A and B may be used.
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Value
2
Remarks
+A, –A
+Z, –Z Not present
The BML-S1G sensor also provides the safety function
safe absolute value. Here the absolute position value is
generated and transmitted without safety. However a
higher level plausibility check is made between the safe
relative rough position information and a safe absolute
value with the accuracy of the relative rough position
information. The other sensor interfaces (BiSS, SSI...)
may not be used alone in safety applications!
For safe operation the sensor must be used in a safe
overall application. The user must consider the entire
safety chain of the safety function (e.g. use of a safety
controller) to determine the achieved SIL and PL.
The outputs have the following data:
Parameters
Period length p [mm]
Tab. 6-12: Parameters for 1Vpp (sin/cos) interface
Outputs Name in the
interface
document
+A (+sin), –A (–sin) +A, –A
+B (+cos), –B (–cos) +B, –B
+Z, –Z
Tab. 6-13: Outputs for 1Vpp-(sin/cos) interface
Designation
Diagnostic Coverage
Useful life
MTTFD
PFHd (EN 62061)
Performance Level
SFF Safe Failure Fraction (EN 62061)
SIL (IEC 61508)
SIL CL (EN 62061)
Safety Category (EN ISO 13849-1)
Type of sub-system (EN/IEC 61508-2)
Tab. 6-14: Safety indicators for 1Vpp (sin/cos) interface
Value
2
Remarks
+Z, –Z Not present
Value
0.99
20 years
294 years
4 E-9 1/h
d
0.99
2
2
3
B
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