Siemens sitrans tr300, Manual

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Technical data
11.1 Technical data
SITRANS TR200/TR300
70
Operating Instructions, 06/2010, A5E01071992-03
1)
Prerequisites: same resistance for all three lines.
Resistance-type transmitter input point
Measured variable Ohmic resistance
Sensor type Resistance, potentiometer
Units of measurement Ω
Interface

Standard connection
1 resistance-type transmitter (R) in two-wire,
three-wire or four-wire input

Averaging
2 resistance-type transmitters in two-wire input
for averaging

Differentiation
2 resistance-type transmitters in two-wire input
(R1 - R2 or R2 - R1)
Connection
 Two-wire input
Line resistance can be assigned in the
parameters ≤100 Ω (loop resistance)
 Three-wire input No trim necessary
1)

Four-wire input
No trim necessary
Sensor current ≤ 0.45 mA
Measuring cycle ≤ 250 ms for 1 sensor with break monitoring
Break monitoring Always active (cannot be switched off)
Short circuit monitoring Can be switched on/off (default value = OFF)
Measuring range Setting range max. 0 ... 2200 Ω (see table in
chapter Digital measuring error (Page 76))
Min. measuring span 5 or 25 Ω (see table in chapter Digital measuring
error (Page 76))
Characteristic curve Linear to resistance or special characteristic
curve
1)
Prerequisites: same resistance for all three lines.