81
11 Supplement
VEGAPULS 69 • Two-wire 4 … 20 mA/HART
47247-EN-200427
Operating voltage U
B
with lighting
switched on
18 … 35 V DC
Reverse voltage protection
Integrated
Permissible residual ripple
Ʋ for 12 V < U
B
< 18 V
≤ 0.7 V
eff
(16 … 400 Hz)
Ʋ for 18 V < U
B
< 35 V
≤ 1 V
eff
(16 … 400 Hz)
Load resistor
Ʋ Calculation
(U
B
- U
min
)/0.022 A
Ʋ Example - U
B
= 24 V DC
(24 V - 12 V)/0.022 A = 545 Ω
Potential connections and electrical separating measures in the instrument
Electronics
Not non-floating
Reference voltage
8)
500 V AC
Conductive connection
Between ground terminal and metallic process fitting
Electrical protective measures
Housing material
Version
Protection acc. to
IEC 60529
Protection acc. to NEMA
Plastic
Single chamber
IP66/IP67
Type 4X
Double chamber
IP66/IP67
Type 4X
Aluminium
Single chamber
IP66/IP68 (0.2 bar)
IP66/IP68 (1 bar)
Type 6P
-
Double chamber
IP66/IP68 (0.2 bar)
IP66/IP68 (1 bar)
Type 6P
-
Stainless steel (electro-pol-
ished)
Single chamber
IP66/IP68 (0.2 bar)
Type 6P
Stainless steel (precision
casting)
Single chamber
IP66/IP68 (0.2 bar)
IP66/IP68 (1 bar)
Type 6P
-
Double chamber
IP66/IP68 (0.2 bar)
IP66/IP68 (1 bar)
Type 6P
-
Connection of the feeding power supply
unit
Networks of overvoltage category III
Altitude above sea level
Ʋ by default
up to 2000 m (6562 ft)
Ʋ with connected overvoltage protection up to 5000 m (16404 ft)
Pollution degree (with fulfilled housing
protection)
4
Protection rating (IEC 61010-1)
III
11.2 Radio astronomy stations
Certain restrictions on the use of VEGAPULS 69 outside closed vessels result from the radio
8)
Galvanic separation between electronics and metal housing parts