ABB REF630 - Checking RTD Inputs and Ma Outputs; RTD Input Circuits; Ma Outputs Circuits

2.12 Checking RTD inputs and mA outputs
2.12.1 RTD input circuits
RTD inputs must be connected in accordance with the terminal diagram provided with
the IED and following the RTD input specifications.
Table 2: RTD input
Terminal Value
Supported RTD sensors PT100 TCR 0.00385 (DIN 43760)
PT250 TCR 0.00385
NI100 TCR 0.00618 (DIN 43760)
NI120 TCR 0.00618
CU10 TCR 0.00427
Supported analog inputs
Voltage ±10 V
Current ±20 mA
Resistance: 0...10 kΩ
Max lead wire resistance (three-wire-
measurement)
PT and NI sensors: 25 Ω
CU10 sensor: 2.5 Ω
Resistance measurement: 25 Ω
Accuracy
PT and NI sensors:
±1°C for measuring range -40°C…+200°C and
±5°C for measuring range -40°C…-100ºC
CU10 sensor:
±4°C for measuring range -40°C…+200°C and
±5°C for measuring range -40°C…-100ºC
Resistance 0...400 Ω: ±2.5 Ω
Resistance 400 Ω...10 kΩ: ±1.25%
Voltage ±10 V: ±0.1% ±40 ppm/ºC
Current ±20 mA: ±0.1% ±20 ppm/ºC
RTD / Resistance sensing current Max 2.2 mA RMS
Current input impedance 100 Ω
Isolation 4 kV (inputs to outputs and inputs to protective
earth)
2.12.2 mA outputs circuits
mA outputs must be connected in accordance with terminal diagram provided with the
IED.
Section 2 1MRS756801 E
Starting up
18 630 series
Commissioning Manual