Thermocouple / mV input card specifications

Installation notes

The Thermocouple terminal block is recommended to provide terminations for field wiring for the Thermocouple / mV input card. An optional terminal block is the 8-channel terminal block.
When the Thermocouple / mV input card is plugged into a Thermocouple terminal block, it functions as a Thermocouple card; when it is plugged into an 8-channel terminal block, it functions as an mV card.
This card requires an S-series controller.

Specifications

Table: Thermocouple / mV input card specifications
Item	Specification
Number of channels	Eight
Sensor Types:	mV: Low level voltage source Thermocouple: B, E, J, K, N, R, S, T, uncharacterized
Full scale signal range	Selectable based on sensor type. Refer to Table: Thermocouple sensor type specifications.
Repeatability	0.05% of span
Resolution (Varies with sensor type. Refer to Table: Thermocouple sensor type specifications ).	16 bits
Calibration	None required
Cold Junction Compensation	±1°C
Isolation	Each channel is optically isolated from the system and factory tested to 1500 VDC. Channels 1, 2, 3, and 4 are isolated from channels 5, 6, 7, and 8 (verified by 1500 VDC factory test). Thermocouples attached to channels 1, 2, 3, and 4 are not electrically isolated and should be within ± 0.7 VDC of each other. Thermocouples attached to channels 5, 6, 7, and 8 are not electrically isolated and should be within ± 0.7 VDC of each other.
DC/50/60Hz Common Mode Rejection	120 dB
Accuracy over temperature range (linearized)	Thermocouple: Refer to Table: Thermocouple sensor type specifications mV: Refer to Table: mV sensor type specifications
Heat dissipation	2.5 W
LocalBus Power Rating	12 VDC, 210 mA
Ambient Temperature	-40 to 70°C
Mounting	Assigned slot of I/O carrier

Note

For all thermocouple sensor types, when a function block is assigned to a thermocouple card, the XD_SCALE and the OUT_SCALE in the function block display the full scale range. When attempting to measure a temperature outside of the full scale range, the module's OUT parameter is clamped within the full scale range and the status of the value transitions to BAD beyond that range. That is, the block displays a value up to the full scale range and beyond that range the value does not change beyond the range limit (High or Low).

Note

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: Thermocouple sensor type specifications
Sensor type	Full scale	Operating range	25°C reference accuracy	Temperature drift	Resolution
Uncharacterized (No linearization, no cold junction compensation.)	-100 to 100 mV	-100 to 100 mV	0.1 mV	±0.002 mV/°C	~ 0.003 mV
B	250 to 1810°C	500 to 1810°C	±2.4°C	±0.056°C/°C	~ 0.18°C
E	-200 to 1000°C	-200 to 1000°C	±0.6°C	±0.008°C/°C	~ 0.07°C
J	-210 to 1200°C	-190 to 1200°C	±0.8°C	±0.011°C/°C	~ 0.05°C
K	-270 to 1372°C	-200 to 1372°C	±0.5°C	±0.016°C/°C	~ 0.18°C
N	-270 to 1300°C	-190 to 1300°C	±1.0°C	±0.007°C/°C	~ 0.10°C
R	-50 to 1768°C	-50 to 1768°C	±2.1°C	±0.013°C/°C	~ 0.14°C
S	-50 to 1768°C	-40 to 1768°C	±2.2°C	±0.067°C/°C	~ 0.24°C
T	-270 to 400°C	-200 to 400°C	±0.7°C	±0.001°C/°C	~ 0.04°C

Table: mV sensor type specifications
Sensor type	Full scale	Operating range	25° reference accuracy	Temperature drift	Resolution
Low Level Voltage Source	-100 to 100 mV	-100 to 100 mV	0.1 mV	0.002 mV/°C	~ 0.003 mV

Wiring diagram

Figure: Thermocouple / mV input card wiring diagram