Supplementary Information Foundation Fieldbus - Siemens SITRANS LG270 Operating Instructions Manual

Ʋ Ex-ia instrument - Power supply
ENTITY model
Ʋ Ex-d-ia instrument
Power supply by/max. number of sensors
Ʋ Fieldbus
Potential connections and electrical separating measures in the instrument
Electronics
Ground terminal
Galvanic separation between electronics and metal housing parts
Ʋ Reference voltage
Electrical protective measures
Protection rating
Housing material
Plastic
Aluminium
Stainless steel, electro-
polished
Stainless steel, precision
casting
Connection of the feeding power supply
unit
Altitude above sea level
Ʋ by default
Ʋ with connected overvoltage protection up to 5000 m (16404 ft)
Pollution degree
5)
Protection class
Approvals
Instruments with approvals can have deviating technical data (depending on the version). For such
instruments, the corresponding approval documents must be noted.

11.2 Supplementary information Foundation Fieldbus

The following table gives you an overview of the instrument versions and the corresponding device
When used with fulfilled housing protection
5)
IEC 61010-1
6)
68
13.5 ... 24 V DC
No lighting possible (integrated ia barrier)
max. 32 (max. 10 with Ex)
Not non-floating
Galvanically connected with the metal process fitting
500 V AC
Version
Single chamber
Double chamber
Single chamber
Double chamber
Single chamber
Single chamber
Double chamber
Networks of overvoltage category III
up to 2000 m (6562 ft)
4
III
6)
SITRANS LG270 - Operating Instructions
Protection acc. to
IEC 60529
IP 66/IP 67
IP 66/IP 67
IP 66/IP 68 (0.2 bar)
IP 66/IP 67
IP 66/IP 68 (0.2 bar)
IP 66/IP 68 (0.2 bar)
IP 66/IP 68 (0.2 bar)
IP 66/IP 67
IP 66/IP 68 (0.2 bar)
Protection acc. to NEMA
Type 4X
Type 4X
Type 6P
Type 4X
Type 6P
Type 6P
Type 6P
Type 4X
Type 6P
PBD-51041071