VEGA VEGAPULS SR 68 4 … 20 mA_HART two-wire - Manual (Page 75)

75
11 Supplement
VEGAPULS SR 68 • 4 … 20 mA/HART two-wire
38294-EN-130624
Integrated clock
Date format
Day.Month.Year
Time format 12 h/24 h
Time zone Ex factory CET
Measurement electronics temerature
Resolution
1 °C (1.8 °F)
Accuracy ±1 °C (1.8 °F)
Voltage supply
Operating voltage U
B
Ʋ Non-Ex instrument 9.6 … 36 V DC
Ʋ Ex-ia instrument 9.6 … 30 V DC
Ʋ Ex-d-ia instrument 14 … 36 V DC
Ʋ Ex-d-ia instrument with ship approval 15 … 36 V DC
Operating voltage U
B
- illuminated display and adjustment module
Ʋ Non-Ex instrument 16 … 36 V DC
Ʋ Ex-ia instrument 16 … 30 V DC
Ʋ Ex-d-ia instrument 20 … 36 V DC
Interpolation protection Integrated
Permissible residual ripple - Non-Ex, Ex-ia instrument
Ʋ for 9.6 V< U
B
< 14 V ≤ 0.7 V
eff
(16 … 400 Hz)
Ʋ for 18 V< U
B
< 36 V ≤ 1.0 V
eff
(16 … 400 Hz)
Permissible residual ripple - Ex-d-ia instrument
Ʋ for 18 V< U
B
< 36 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
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) 5)
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.
5) The prerequisites for maintaining the protection rating are a suitable cable as well as correct mounting.