90
11 Supplement
VEGAFLEX 86 • 4 … 20 mA/HART - two-wire
49477-EN-150102
Ʋ
for 18 V< U
N
< 35 V
≤ 1.0 V
eff
Load resistor
Ʋ
Calculation
(U
B
- U
min
)/0.0215 A
Ʋ
Example - Non-Ex instrument with
U
B
= 24 V DC
(24 V - 9.6 V)/0.0215 A = 670 Ω
Electrical protective measures
Protection rating
Housing material
Version
IP-protection class
NEMA protection
Plastic
Single chamber
IP 66/IP 67
NEMA 4X
Double chamber
IP 66/IP 67
NEMA 4X
Aluminium
Single chamber
IP 66/IP 68 (0.2 bar)
IP 68 (1 bar)
NEMA 6P
NEMA 6P
Double chamber
IP 66/IP 67
IP 66/IP 68 (0.2 bar)
IP 68 (1 bar)
NEMA 4X
NEMA 6P
NEMA 6P
Stainless steel, electro-
polished
Single chamber
IP 66/IP 68 (0.2 bar)
NEMA 6P
Stainless steel, precision
casting
Single chamber
IP 66/IP 68 (0.2 bar)
IP 68 (1 bar)
NEMA 6P
NEMA 6P
Double chamber
IP 66/IP 67
IP 66/IP 68 (0.2 bar)
IP 68 (1 bar)
NEMA 4X
NEMA 6P
NEMA 6P
Overvoltage category
III
9)
Protection class
III
10)
Approvals
Instruments with approvals can have different technical specifications depending on the version.
For that reason the associated approval documents of these instruments have to be carefully
noted. They come with the delivery or can be downloaded under www.vega.com, "
VEGA Tools
"
and "
Instrument search
" as well as under www.vega.com/downloads and "
Approvals
".
11.2 Dimensions
The following dimensional drawings represent only an extract of all possible versions. Detailed
dimensional drawings can be downloaded at www.vega.com/downloads under "
Drawings
".
9)
IEC 61010-1
10)
IEC 61010-1