Vega VEGAMET 861 - Page 59

59
15 Supplement
VEGAMET 861 • 4 … 20 mA/HART
58866-EN-200401
Temperature error relating to 20 mA 0.008 %/K
Adjustment range HART sensor ± 10 % of sensor measuring range
Connection cable to the HART sensor two-wire screened standard cable
Digital input
Quantity 2 x digital input
Input type active
Ʋ Voltage > 14 V DC
Ʋ Current > 3 mA
Ʋ Max. load 200Ω
Input type passive
Ʋ Switching threshold Low -3 … 5 V DC
Ʋ Switching threshold High 11 … 30 V DC
Ʋ Max. input voltage 30 V DC
Ʋ Max. input current 30 mA
Ʋ Max. sampling rate 10 Hz
Ʋ Input impedance 8kΩ
Relay output
Quantity 4xoperatingrelay,onecanbeconguredasfailsafe
relay
Function Switching relay for level, fault signal or pulse relay for
ow/samplingpulse,pumpcontrol
Contact Floating spdt
Contact material AgSnO2, hard gold-plated
Switching voltage max. 250 V AC/60 V DC
Switching current max. 1 A AC (cos phi > 0.9), 1 A DC
Breaking capacity
3)
min. 50 mW, max. 250 VA, max. 40 W DC (with
U < 40 V DC)
AC/DC operation Mixed operation with AC/DC voltage is not permitted for
the relay outputs
Min. programmable switching hysteresis 0.1 %
Mode pulse output
Ʋ Pulse length 350 ms
Current output
Quantity 1 x output
Function Level/ow/samplingpulse
Range 0/4 … 20 mA, 20 … 0/4 mA
Resolution 1 µA
Max. load 500Ω
3)
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.