Electrical Data For Inputs And Outputs - ABB TTH300 Operating Instructions Manual

7.3.3

Electrical data for inputs and outputs

Input - resistance thermometer / resistances
Resistance thermometer
— Pt100 according to IEC 60751, JIS C1604, MIL-T-24388
— Ni according to DIN 43760
— Cu according to recommendation OIML R 84
Resistance measurement
— 0 ... 500 Ω
— 0 ... 5000 Ω
Sensor connection type
— Two-, Three-, Four wire-circuits
Connection lead
— Maximum sensor line resistance:
of 50 Ω per line in accordance with NE 89
— Three-wire circuit:
Symmetrical sensor line resistances
— Two-wire circuit::
Compensation up to 100 Ω total lead resistance
Measurement current < 300 μA
Sensor short circuit < 5 Ω (for resistance thermometers)
Sensor wire break
— Measuring range: 0 ... 500 Ω > 0.6 ... 10 kΩ
— Measuring range 0 ... 5 kΩ > 5.3 ... 10 kΩ
Corrosion detection in accordance with NE 89
— Three-wire resistance measurement > 50 Ω
— Four-wire resistance measurement > 50 Ω
Sensor error signaling
— Resistance thermometer - Sensor short circuit and sensor
wire breakage
— Linear resistance measurement: Sensor wire break
18 OI/TTH300-EN Rev. D | TTH300
Input - thermocouples / voltages
Types
— B, E, J, K, N, R, S, T in accordance with IEC 60584
— U, L in accordance with DIN 43710
— C, D in accordance with ASTM E-988
Voltages
— -125 ... 125 mV
— -125 ... 1100 mV
Supply line
— Maximum sensor line resistance
1.5 kΩ per wire, 3 kΩ in total
Sensor wire break monitoring in accordance with NE 89
— Pulsed with 1 μA outside measurement interval
— Thermocouple measurement 5.3 ... 10 kΩ
— Voltage measurement 5.3 ... 10 kΩ
Input resistance > 10 MΩ
Internal reference junction Pt1000, IEC 60751 Cl. B
(no additional jumpers necessary)
Sensor error signaling
— Thermocouple: wire break
— Linear voltage measurement: wire break
Functionality input
Free style characteristic curve / 32-point -sampling point table
— Resistance measurement up to max. 5 kΩ
— Voltages up to max. 1.1 V
Sensor error adjustment
— Via Callendar-Van Dusen coefficients
— Via value table of 32 reference points
— Via single-point adjustment (offset adjustment)
— Via two-point adjustment
Input functionality
— 1 sensor
— 2 sensors:
mean measurement,
differential measurement,
sensor redundancy,
Sensor drift monitoring