Isolated Input

The DeltaV system supports the Series 2 Isolated Input card in Simplex mode.

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

The Isolated Input card uses the Isolated Input Terminal Block to provide terminations for wiring.

Table: Isolated Input Card Specifications
Item	Specification
Number of channels	Four
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. Each channel is optically isolated from each other and factory tested to 3100 VDC.⁽¹⁾
ADC resolution	16 bit
-3dB filter frequency	2.7 Hz
DC/50/60 Hz common-mode rejection	120 dB
Input impedance	10 MΩ
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 C-24 and Table C-27.
Input type mix	Independently configurable
Ambient temperature	-40 to 70 °C
Calibration	None required
Mounting	Assigned slot of I/O carrier
LocalBus power rating	12 VDC, 350 mA, no field power required

⁽¹⁾ Warning: When hazardous live voltages are present on a channel, adjacent channel wiring must be inaccessible.

Table: Isolated Input Card, Thermocouple and Millivolt Input Specifications
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

In the 25°C Reference Accuracy column in the following table, total error is made up of reading accuracy, CJC accuracy, and sensor accuracy.

Table: Isolated Input Card Thermocouple Input Range Specifications
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: Isolated Input Card Millivolt Input Range Specifications
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: Isolated Input Card, RTD, ohms Input Specifications
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: Isolated Input Card, RTD, ohms Input Range Specifications
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: Isolated Input Card, Voltage Input Range Specifications
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

Figure: Wiring Diagram for Series 2 Isolated Input