Siemens SITRANS LG240 Operating Instructions Manual page 76

Resolution
Accuracy
Voltage supply
Operating voltage U
B
Ʋ Non-Ex instrument, Ex-d instrument
Ʋ Ex ia instrument
Ʋ Ex-d-ia instrument
Ʋ Ex-d-ia instrument with ship approval 15 ... 35 V DC
Operating voltage U
B
Ʋ Non-Ex instrument, Ex-d instrument
Ʋ Ex ia instrument
Ʋ Ex-d-ia instrument
Reverse voltage protection
Permissible residual ripple - Non-Ex, Ex-ia instrument
Ʋ for 9.6 V< U < 14 V
B
Ʋ for 18 V< U < 36 V
B
Permissible residual ripple - Ex-d-ia instrument
Ʋ for 18 V< U < 36 V
B
Load resistor
Ʋ Calculation
Ʋ Example - Non-Ex instrument with
U = 24 V DC
B
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
76
< 0.1 K
±3 K
9.6 ... 35 V DC
9.6 ... 30 V DC
15 ... 35 V DC
- illuminated display and adjustment module
16 ... 35 V DC
16 ... 30 V DC
No lighting (integrated ia barrier)
Integrated
≤ 0.7 V
≤ 1.0 V
≤ 1 V
(U
(24 V - 9.6 V)/0.022 A = 655 Ω
Not non-floating
Galvanically connected with the metal process fitting
500 V AC
Version
Single chamber
Double chamber
Single chamber
Double chamber
Single chamber
SITRANS LG240 - Operating Instructions
(16 ... 400 Hz)
eff
(16 ... 400 Hz)
eff
(16 ... 400 Hz)
eff
- U )/0.022 A
B min
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)
Protection acc. to NEMA
Type 4X
Type 4X
Type 6P
Type 4X
Type 6P
Type 6P
PBD-51041038