
60
11 Supplement
VEGABAR 81 • 4
… 20 mA
45025-EN-140228
Voltage supply
Operating voltage U
B
Ʋ
Non-Ex instrument
9.6 …
35
V DC
Ʋ
Ex-d instrument
9.6 …
35
V DC
Ʋ
Ex-ia instrument
9.6 … 30 V DC
Ʋ
Ex-d-ia instrument
15
…
35
V DC
Ʋ
Ex-d-ia instrument with ship approval 15
…
35
V DC
Interpolation protection
Integrated
Permissible residual ripple - Non-Ex, Ex-ia instrument
Ʋ
for U
N
12 V DC (9.6 V<
U
B
<
14
V)
≤ 0.7 V
eff
(16 … 400 Hz)
Ʋ
for U
N
24
V DC (18 V<
U
B
<
35
V)
≤ 1.0 V
eff
(16 … 400 Hz)
Permissible residual ripple - Ex-d-ia instrument
Ʋ
for U
N
24
V DC (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 - Non-Ex instrument with
U
B
=
24
V DC
(24 V - 9.6 V)/0.022 A = 655 Ω
Potential connections in the instrument
Electronics
Not non-floating
Ground terminal
Galvanically connected with the process fitting
Electrical protective measures
Housing material
Version
IP-protection class
NEMA protection
Plastic
Single chamber
IP 66/IP 67
NEMA 4X/6P
Double chamber
IP 66/IP 67
NEMA 4X
Aluminium
Single chamber
IP 66/IP 68 (0.2 bar)
IP 68 (1 bar)
NEMA 4X/6P
-
Double chamber
IP 66/IP 67
IP 66/IP 68 (0.2 bar)
NEMA 4X
NEMA 4X
Stainless steel, electro-
polished
Single chamber
Single chamber
IP 69K
IP 66/IP 68 (0.2 bar)
-
NEMA 4X/6P
Stainless steel, investment
casting
Single chamber
IP 66/IP 68 (0.2 bar)
IP 68 (1 bar)
NEMA 4X/6P
NEMA 4X
Double chamber
IP 66/IP 67
IP 66/IP 68 (0.2 bar)
NEMA 4X
NEMA 4X
Stainless steel
Transmitter for external
housing
IP
68 (25
bar)
-
Overvoltage category
III
Protection class
II