Siemens SITRANS Probe LU Quick Start Manual page 180

The number of passive devices connected to the bus segment is not limited due to I.S. reasons. If the above
rules are respected, up to the specified total length, the inductance and capacitance of the cable will not
impair the intrinsic safety or the installation.
Notes:
INTRINSICALLY SAFE
1. Approved apparatus must be installed in accordance with manufacturer instructions.
2. Approved associated apparatus must meet the following requirements:
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3. The maximum non-hazardous area voltage must not exceed 250 V.
4. In the USA the installation must be in accordance with the National Electrical Code NFPA 70,
Article 504, resp. Article 505 and ANSI/ISA-Rp 12.6 (except chapter 5). In Canada observe
the Canadian Electrical Code.
5. Multiple earthing of screen is allowed only, if high integrity equipotential system is realized between
the points of bonding.
6. WARNING: Substitution of components may impair intrinsic safety.
FM applications: NONINCENDIVE, CLASS I, II, III DIV. 2, GROUPS A, B, C, D, E, F, G
1. Intrinsic safety barrier not required. Max. supply voltage 30 V.
2. WARNING: Explosion Hazard - do not disconnect equipment unless power has been switched off
or the area is known to be Non- Hazardous.
3. WARNING: Substitution of components may impair suitability for Class I, Division 2.
FOR INTERNAL
USE ONLY
Page A-2 SITRANS Probe LU (PROFIBUS PA) – QUICK START MANUAL
CLASS I, II, III DIV. 1, GROUPS A, B, C, D, E, F, G
CLASS I, ZONE 0/1 GROUPS IIB / IIC
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Product Group
ULTRASONICS
18 / APRIL / 2005
R. CLYSDALE
E. DeSIMONE
S. NGUYEN
PETERBOROUGH
2365061700
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SITRANS Probe LU
PROFIBUS PA
CONNECTION DRAWING
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APRIL
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18 / 2005
NTS A
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