VEGA VEGAFLEX 81 4 … 20 mA_HART two-wire Coax probe With SIL qualification - Manual (Page 82)

82
12 Supplement
VEGAFLEX 81 • 4 … 20 mA/HART two-wire
44216-EN-130823
Voltage supply
Operating voltage
Ʋ Non-Ex instrument, 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
Operating voltage with illuminated display and adjustment module
Ʋ Non-Ex instrument, Ex-d instrument 16 … 35 V DC
Ʋ Ex-ia instrument 16 … 30 V DC
Ʋ Ex-d-ia instrument 20 … 35 V DC
Interpolation protection Integrated
Permissible residual ripple - Non-Ex, Ex-ia instrument
Ʋ for 9.6 V< U
N
< 14 V ≤ 0.7 V
eff
(16 … 400 Hz)
Ʋ for 18 V< U
N
< 36 V ≤ 1 V
eff
(16 … 400 Hz)
Permissible residual ripple - Ex-d-ia instrument
Ʋ for 18 V< U
N
< 35 V ≤ 1 V
eff
(16 … 400 Hz)
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, depending on housing version
Ʋ Plastic housing IP 66/IP 67
Ʋ Aluminium housing, stainless steel
housing - investment casting, stain-
less steel housing - electro-polished
IP 66/IP 68 (0.2 bar) 10)
Ʋ Aluminium and stainless housing, in-
vestment casting (optionally available)
IP 66/IP 68 (1 bar)
Overvoltage category III
Protection class III
Approvals
Instruments with approvals can have different technical data depending on the version.
For that reason the associated approval documents of these instruments must be carefully noted.
They are part of the delivery or can be downloaded under www.vega.com and "VEGA Tools" as
well as under "Downloads" and "Approvals".
12.2 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".
10) The prerequisites for maintaining the protection rating are a suitable cable as well as correct mounting.