VEGA VEGAFLEX 66 (-110…+400°C) 4 … 20 mA_HART - Manual (Page 56)

P
ermissible residual ripple
-
< 100 H z U
ss
< 1 V
-
100 H z … 10 kHz U
ss
< 10 mV
L
oad see diagram
1000
750
500
250
14 18 16 20 22 24 26 28 30 32 34 36
Ω
V
4
1
2
3
Fig. 30: Voltage diagram
1
HART load
2 Voltage limit EEx-ia instrument
3 Voltage limit non-Ex/Exd instrument
4 Supply voltage
Electrical protective measures
P
rotection, depending on housing version
-
P lastic housing IP 66/IP 67
-
A luminium housing, stainless steel
housing - investment casting, stain-
less steel housing - electro-polished
IP 66/IP 68 (0.2 bar) 4)
-
A
luminium and stainless housing,
investment casting (optionally avail-
able)
IP 66/IP 68 (1 bar)
O vervoltage category III
P
rotection class
II
Functional safety (SIL)
F unctional safety according to IEC 61508/IEC 61511
-
S ingle channel architecture (1oo1D) up to SIL2
-
double channel diversitary redun-
dant architecture (1oo2D) up to SIL3
4) A suitable cable is the prerequisite for maintaining the protection class.
56 VEGAFLEX 66 • 4 … 20 mA/HART
10 S upplement
32762
-EN
-080716