
78
11 Supplement
VEGAPULS SR 68 • 4 … 20 mA/HART - two-wire
38294-EN-160707
Integrated clock
Date format
Day.Month.Year
Time format
12 h/24 h
Time zone Ex factory
CET
Rate deviation max.
10.5 min/year
Additional output parameter - Electronics temperature
Output of the temperature values
Ʋ
Analogue
Via the current output
Ʋ
Digital
Via the digital output signal - depending on the electron-
ics version
Range
-40 … +85 °C (-40 … +185 °F)
Resolution
< 0.1 K
Accuracy
±3 K
Voltage supply
Operating voltage U
B
Ʋ
Non-Ex instrument
9.6 … 35 V DC
Ʋ
Ex ia instrument
9.6 … 30 V DC
Ʋ
Ex-d-ia instrument
14 … 35 V DC
Ʋ
Ex-d-ia instrument with ship approval 15 … 35 V DC
Operating voltage U
B
- illuminated display and adjustment module
Ʋ
Non-Ex instrument
16 … 35 V DC
Ʋ
Ex ia instrument
16 … 30 V DC
Ʋ
Ex-d-ia instrument
No lighting (integrated ia barrier)
Reverse voltage 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 rating
Housing material
Version
IP-protection class
NEMA protection
Plastic
Single chamber
IP 66/IP 67
Type 4X
Double chamber
IP 66/IP 67
Type 4X