Additional Analog, Incremental Real-Time Signal (Sin/Cos) (1Vpp) (Bml-S1G0 - Balluff BML-S1G0-7-M5EG-0 Serie Manual De Instrucciones

BML-S1G0-_7_ _-M5EG-_0-_ _
Absolute magnetic encoder system
6
Interfaces (continued)
6.4 Additional analog, incremental real-time
signal (sin/cos) (1Vpp)
(BML-S1G0-_ _ _ _-M5EG-_0-...)
In the document Interfaces for BML Magnetic
Encoder System the safety analog real-time
signal (sin/cos) (1Vpp) is described. The
document is part of this guide and must be
used.
BML sensors with the G-interface (BML......) 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 sin/cos (1Vpp)
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.
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: Safety analog sin/cos (1Vpp) interface parameters
Outputs
+A (+sin), –A (–sin)
+B (+cos), –B (–cos)
+Z, –Z
Tab. 6-13: Analog interface outputs for sin/cos (1Vpp) interface
22 english
Value
2
Name in the Remarks
interface
document
+A, –A
+B, –B
+Z, –Z Not present
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 analog sin/cos (1Vpp) interface
Value
0.99
20 years
294 years
4 E-9 1/h
d
0.99
2
2
3
B