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9 Functional safety
9.1 General
This safety manual applies to measuring systems consisting of
OPTISWITCH 3100 C vibrating level switches and integrated
oscillator VB60Z. The instrument corresponds to a subsystem
of type B.
The sensor software must correspond at least to version 1.03
or higher.
The measuring system can be used for level detection of
powders and granules which meet the specific requirements of
the safety technology, e.g.:
l Mode "max" for overfill protection
l Mode "min" for dry run protection
The measuring system is qualified in both modes to meet the
following requirement degree acc. to IEC 61508-2:
l SIL2 with architecture 1oo1D (single channel)
l SIL3 with architecture 1oo2D (double-channel/redundant)
With a special factory setting, the measuring system is also
suitable for detection of solids in water (see operating
instructions manual).
The safety function of this measuring system is the detection
and signalling of the condition of the vibration element. The
safe condition depends on the mode:
l In mode "max": condition "covered"
l In mode "min": condition "uncovered"
l IEC 61508-1,-2,-4
- Functional safety of electrical/electronic/programmable
electronic systems
The failure limit values for a safety function, depending on the
SIL class (of IEC 61508-1, 7.6.2)
Safety integrity level Low demand mode High demand mode
SIL PFD
avg
PFH
4 >=10
-5
up to < 10
-4
>=10
-9
up to < 10
-8
3 >=10
-4
up to <10
-3
>=10
-8
up to <10
-7
2 >=10
-3
up to <10
-2
>=10
-7
up to <10
-6
1 >=10
-2
up to < 10
-1
>=10
-6
up to < 10
-5
Validity
Area of application
Safety function
Relev ant standards
Safety requirements
26 OPTISWITCH 310 0 C - with two-wire output
Functional safety
29955-EN-060112
- Operating Instructions 1
- Contents 2
- 1 About this document 4
- 1 Sequence 4
- 2 For your safety 5
- 2.6 SIL conformity 6
- 3 Product description 7
- 3.3 Adjustment 8
- 3.4 Storage and transport 9
- 4 Mounting 10
- 4.2 Mounting information 11
- 29955-EN-060112 12
- 5 Connecting to power supply 14
- 6.1 General 18
- 6.2 Adjustment elements 19
- 6.3 Funct ion chart 20
- 7.1 Maintenance 22
- 7.2 Fault rectification 22
- ? Signal lamp flashes red 23
- 7.4 Instrument repair 24
- 8 Dismounting 25
- 9 Functional safety 26
- 9.2 Planning 27
- 9.3 Setup 30
- 9.5 Recurring function test 30
- 10 Supplement 36
- ATEX II 1/2 DIP66 T 39
- 10.2 Dimensions 40
- 10.3 Cer tificates 43
- CE declaration of conformity 44
- Manufacturer declaration 45
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