VEGA VEGAMET 391 With SIL qualification - Manual (Page 47)

47
12 Supplement
VEGAMET 391 • With SIL qualification
38704-EN-130228
Max. sampling rate 10 Hz
Relay outputs
Quantity
4 x operating relay
Function Switching relay for level (relay 1 … 4)
Fault signal or pulse relay for flow/sampling pulse (relay
1/2)
Contact Floating spdt
Contact material AgSnO2, hard gold-plated
Turn-on voltage min. 10 mV DC, max. 250 V AC/60 DC
Switching current min. 10 µA DC, max. 3 A AC, 1 A DC
Breaking capacity min. 50 mW, max. 500 VA, max. 54 W DC (with U less
than 40 V) 1)
Min. programmable switching hysteresis 0.1 %
Mode pulse output (relay 1/2)
Ʋ Pulse length 350 ms
Current output
Quantity
1 x output
Function Current output for level
Range 4 … 20 mA
Resolution 1 µA
Max. load 500 Ω
Fault message 0 mA
Accuracy
Ʋ Standard ±20 µA (0.1 % of 20 mA)
Ʋ with EMC interferences ±200 µA (1 % of 20 mA)
Temperature error relating to 20 mA 0.005 %/K
USB interface 2)
Quantity 1 x on front plate
Plug connection Mini-B (4-pole)
USB specification 2.0 (Fullspeed)
Max. cable length 5 m (196 in)
Indications
Measured value indication
Ʋ graphic-capable LC display
(65 x 32 mm), lighted
digital and quasianalogue indication
Ʋ Max. indicating range -99999 … 99999
LED displays
1) If inductive loads or stronger currents are switched through, the gold plating on the relay contact surface will be
permanently damaged. The contact is then no longer suitable for switching low-level signal circuits.
2) Limited temperature range, see ambient conditions