Endress+Hauser Ecograph T RSG30 - Limit Values and Cable Open Circuit Detection

Technical data
73
Channel isolation All analog inputs are galvanically isolated from one another. The testing voltage between the
channels is 500 V (no safety isolation)
Scan rate All channels are scanned within 100 ms.
Resolution For all ranges:  18 bit
Integration, analysis,
mathematic (option package)
Integration (Quantity calculation of analog channels): It is possible to calculate an intermediate,
daily, monthly, yearly or total value (13-digit, 64 bit).
Analysis: Quantity-/operating time recording (standard function), additionally a min/max/
average value evaluation within the preset period.
Mathematic: Up to 5 mathematics channels. Mathematic calculation of analog channels using
basic arithmetic operands (+, -, *,/), constants. In addition either the sum or the average value of
several channels can be calculated. If the mathematics channel is used then 1 analog channel is lost.
10.1.2 Digital inputs
Number 3 digital inputs
Input level To IEC 61131-2:
Logical "0" (corresponds to -3 to +5 V), activation with logical "1" (corresponds to +12 to +30 V)
Input frequency Max. 25 Hz
Measured
variable
Limit values (steady-state,
without destroying input)
Cable open circuit detection/line influence/temperature
compensation
Current Maximum permitted input voltage: 2.5 V
Maximum permitted input current: 50 mA
4...20 mA range with cable open circuit monitoring to NAMUR NE43.
Activate/deactivate the 4...20 mA loop monitoring as per NAMUR recomendation NE43.
On activation:
 3.8 mA: Under range (indicate: vvvvvv)
 20.5 mA: Over range (indicate: ^^^^^^)
 3.6 mA or  21.0 mA: Open Circuit (indicate: - - - -)
Voltage > 1 V Maximum permitted input voltage: 35 V 1...5 V range with cable open circuit monitoring:
< 0.8 V or > 5.2 V: Open Circuit (indicate: - - - -)
Voltage  1 V Maximum permitted input voltage: 12 V
Resistance
thermometer
(RTD)
Measuring current:  1 mA Disengageable cable open circuit detection
Maximum barrier resistance (or line resistance):
Max. 200 Ohm (4-wire)
Max. 40 Ohm (3-wire)
Maximum influence of barrier resistance (or line resistance) for Pt100, Pt500 and
Pt1000: 4-wire: ±0.0002%/Ohm, 3-wire: ±0.002%/Ohm
Maximum influence of barrier resistance (or line resistance) for Pt46, Pt50, Cu100, Cu50
and Cu53: 4-wire: ±0.0006%/Ohm, 3-wire: ±0.006%/Ohm
Thermocouples
(TC)
Maximum permitted input voltage: 12 V Disengageable cable open circuit detection from 50 kOhm
Error, internal temperature compensation:  2 K