VEGA VEGASWING 83 fail safe and signal conditioning instrument VEGATOR 526 Ex - Manual (Page 4)

4 VEGASWING 81 W5 Ex.C, 83 W5 Ex.C fail safe
VEGATOR 526 W Ex
on
!
Overfill protection with VEGASWING 83 W5 Ex.C
Ex-Zone 1
VEGASWING
Two-wire line
(intrinsically
safe circuit)
Not Ex-area
VEGATOR 526 Ex
Relay for
max. signal
Relay for fault
signal
During the cyclical self-test safety relevant
components and procedures (e.g. level relay,
CPU) are checked in a very narrow time
pattern in the signal conditioning instrument.
The fault monitoring of the level relay is made
without interruption of the circuit of connected
systems.
The integral fault monitoring detects:
- interruption of the connection line to the
piezoelements
- strong abrasion on the tuning fork
- break or damage of the tuning fork
- vibration failure
- all safety relevant components (sensor and
signal conditioning instrument) are
permanently monitored (drift, component
failure, time failure etc.)
- meets requirement class 5 (AK5) acc. to
DIN␣ V␣ 19␣ 250
- two-wire line on line break and shortcircuit.
If a so called failure is determined or in case
of voltage failure, the electronics takes a
defined switching condition, i.e. the failure is
signalled via a defined current to the
connected signal conditioning instrument
VEGATOR 526␣ Ex and the level and fail safe
relays de-energize.
Configuration
A measuring system consists of:
- a VEGASWING with oscillator
SWING␣ E86␣ Ex
- a signal conditioning instrument VEGATOR
526 Ex
- external instruments switched by VEGATOR
(signallers, horns etc.).
Product description