Isolated input card specifications

The Isolated Input card supports thermocouple, millivolt, RTD, ohm, and voltage input ranges.

The Isolated Input card does not support overrange and underrange values.

Installation notes

Specifications

Table: Isolated input card specifications
Item Specification
Number of channels Four
Thermocouple sensor types B, E, J, K, N, R, S, T, uncharacterized
RTD sensor types PT100, PT200, Ni120, Cu10, resistance, user-defined
mV and V ranges Refer to Table: mV input range specifications for the Isolated input card and Table: Voltage input range specifications for the Isolated input card .
Input type mix Independently configurable
AD resolution 16-bit
Calibration None required
Isolation CAN/CSA-C22.2 No.1010.1 or CAN/CSA-C22.2 No.61010.1
  • Installation Cat II, Pollution degree 2.
  • Channel to system - 600 VAC double insulation. Each channel is optically isolated from the system and factory tested to 5000 VDC.
  • Channel to channel - 600 VAC basic insulation.(1) Each channel is optically isolated from each other and factory tested to 3100 VDC.
Rolloff frequency -3dB at 2.7 Hz
LocalBus power rating 12 VDC, 350 mA, no field power required
DC/50/60 Hz common-mode rejection 120 dB
Heat dissipation 4.2 W
Input impedance 10 M Ω
Mounting Assigned slot of I/O carrier
(1) Warning: When hazardous live voltages are present on a channel, adjacent channel wiring must be inaccessible.
Table: Thermocouple and mV specifications for the Isolated input card
Item Specification
Linearization error ±0.003% Full Scale
Cold-junction compensation accuracy ±1.0 °C
Cold-junction compensation types
  • off
  • local
  • remote
Cold-junction compensation range -40 to 85 °C
Temperature scale ITS90
Open-circuit detection (thermocouple only) 0.4 µA DC
Detection time 1 second
Note

In the 25 °C reference accuracy column in the following table, total error consists of reading accuracy, CJC accuracy, and sensor accuracy.

Table: Thermocouple input range specifications for the Isolated input card
Sensor types 25°C reference accuracy Temperature drift Nominal resolution Full scale Operating range
B ±1.2 °C ±0.116 °C/°C 0.09 °C 250 to 1810 °C 500 to 1810 °C
E ±0.5 °C ±0.004 °C/°C 0.05 °C -200 to 1000 °C -200 to 1000 °C
J ±0.6 °C ±0.005 °C/°C 0.06 °C -210 to 1200 °C -190 to 1200 °C
K ±0.5 °C ±0.013 °C/°C 0.05 °C -270 to 1372 °C -140 to 1372 °C
N ±1.0 °C ±0.015 °C/°C 0.05 °C -270 to 1300 °C -190 to 1300 °C
R ±1.7 °C ±0.083 °C/°C 0.06 °C -50 to 1768 °C 0 to 1768 °C
S ±1.8 °C ±0.095 °C/°C 0.08 °C -50 to 1768 °C 0 to 1768 °C
T ±0.7 °C ±0.025 °C/°C 0.04 °C -270 to 400 °C -200 to 400 °C
Uncharacterized no linearization or CJC ±0.05 mV ±0.0003 mV/°C 0.0031 mV -100 to 100 mV -100 to 100 mV
Table: mV input range specifications for the Isolated input card
Sensor type Input ranges 25 °C reference accuracy Temperature drift Maximum resolution
20 mV ±20 mV ±0.02 mV ±0.001 mV/°C 0.0008 mV
50 mV ±50 mV ±0.03 mV ±0.0005 mV/°C 0.0017 mV
100 mV ±100 mV ±0.05 mV ±0.0003 mV/°C 0.0031 mV
Table: RTD, ohms input specifications for the Isolated input card
Item Specification
Measurement configurations 2, 3, and 4 wire
Excitation current 100 µA DC
Temperature scale ITS90
Open sensor detection time 1 second
Short circuit detection time 1 second
Pt 100 and Pt 200 alpha 0.00385
Table: RTD, ohms input range specifications for the Isolated input card
Sensor type 25 °C reference accuracy Temperature drift Resolution Sensor input range
Pt100 ±0.5 °C ±0.018 °C/°C 0.05 °C -200 to 850 °C
Pt200 ±0.5 °C ±0.012 °C/°C 0.05 °C -200 to 850 °C
Ni120 ±0.2 °C ±0.006 °C/°C 0.02 °C -70 to 300 °C
Cu10 ±2.0 °C ±0.076 °C/°C 0.23 °C -30 to 140 °C
Resistance ±0.5 Ω ±0.018 Ω/°C 0.02 Ω 1 to 1000 Ω
User defined ±0.4 Ω ±0.009 Ω/°C ~0.05 Ω 0 to 1000 Ω
Table: Voltage input range specifications for the Isolated input card
Sensor type Sensor range 25 °C reference accuracy Temperature drift Maximum resolution
0 - 5 V 0 - 5 V ±0.005 V ±0.0002 V/°C 0.00009 V
0 - 10 V 0 - 10 V ±0.010 V ±0.0004 V/°C 0.00016 V
1 - 5 V 1 - 5 V ±0.005 V ±0.0002 V/°C 0.00009 V
1 V ±1 V ±0.0025 V ±0.0002 V/°C 0.00015 V
5 V ±5 V ±0.005 V ±0.0002 V/°C 0.00017 V
10 V ±10 V ±0.010 V ±0.0004 V/°C 0.0003 V

Wiring diagram

Figure: Isolated input card wiring diagram


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