VEGA VEGASTAB 690 - Manual (Page 3)

VEGASTAB 690 3
Product description
1 Product description
1.1 Function and configuration
VEGASTAB 690 power supply unit is a mod-
ule instrument with plug-in socket, suitable for
carrier rail mounting DIN 46 277.
Function
The power supply unit provides two galvani-
cally separated supply circuits. Both circuits
are shortcircuit proof (current limitation
approx. 26 mA) and are equipped with inter-
lock diodes for control.
Configuration
VEGASTAB 690 power supply unit can power
- hydrostatic pressure transmitters
- process pressure transmitters or
- differential pressure transmitters
and ensures the configuration of a complete
measuring system per circuit in conjunction
with one of these sensors.
1.2 Types and versions
Standard application
A power supply unit powers max. two sen-
sors. Both, i.e. power supply unit and sensor
form one measuring system.
VEGASTAB …
p p
1 2 4 3
5 6 7 8
9 10 11 12 13 14
VEGASTAB 690
on
+ –
1
2
p
Standard application
Ex application
Ex area Non-Ex area
e.g.
DCS
e.g.
DCS
Safety barrier
type 145
Application in Ex area
A power supply unit powers via max. two ia
safety barriers type 145 two sensors in Ex
area. Together they form one measuring
system.