VEGA VEGAFLEX 67 (-40…+150°C) 4 … 20 mA_HART two-wire - Manual (Page 55)

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. 29: Voltage diagram
1 HART load
2 Voltage limit EEx-ia instrument
3 Voltage limit non-Ex/Ex-d instrument
4 Operating 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, stainless
steel housing - electro-polished
IP 66/IP 68 (0.2 bar) 4)
-
A luminium and stainless housing, in-
vestment casting (optionally available)
IP 66/IP 68 (1 bar)
O vervoltage category III
P rotection class II
Approvals
I nstruments with approvals can have different technical data depending on the version.
T hat's why the associated approval documents have to be noted with these instruments. They are
part of the delivery or can be downloaded under www.vega.com via "VEGA Tools" and "serial
number search" as well as via "Downloads" and "Approvals".
4) A suitable cable is the prerequisite for maintaining the protection rating.
VEGAFLEX 67 • 4 … 20 mA/HART - two-wire 55
10 S upplement
31853
-
EN
-120329