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OMB-DAQ-TC-RACK-Series
32-Channel USB/IP Based Thermocouple Data Acquisition System
- USB and 10/100 Ethernet Interface
- 32 Differential Thermocouple Inputs
- Expandable to 64 Thermocouple Inputs with OMB-DAQ-TC-RACK-EXP32 Expansion Module
- Thermocouple Channel-to-Host Isolation
OMB-DAQ-TC-RACK-Series
From
$
3,081.88
Product Overview
- Accuracy ± 0.2 °C (± 0.36 °F)
- Alarm modes Active High Output, Active Low Output, Disabled Output, Error Mode, High, High/Low, Low, Manual reset
- Alarm Note Each alarm controls its associated digital output line as an alarm output. When an alarm is enabled, its associated output line is driven to the appropriate state determined by the alarm options and input temperature. The alarm configurations are stored in non-volatile memory and loaded at power on. Alarm Latency: 1 second, max
- Analog I/O Note Analog Input Note: Specifications (Typical for 25°C (77°F) unless otherwise specified);These specifications apply to both the OMB-DAQ-TC-RACK and OMB-DAQ-TC-RACK-EXP32 unless noted otherwise.;Thermocouple Input;A/D Converter Type: Delta-Sigma;A/D Resolution: 24-bit;Number of Channels: 32 (64 when OMB-DAQ-TC-RACK is connected to OMB-DAQ-TC-RACK-EXP32);Filtering Options: 50 Hz or 60 Hz noise filtering, software-selectable;Isolation Between Any Thermocouple Input Channel and Chassis Ground: 500 Vdc absolute max;Channel Configuration: Software-selectable to match thermocouple sensor type;Differential Input Voltage Range: ±78.125 mV;Absolute Maximum Input Voltage (Between any Two TCx Inputs): ±25V (power on), ±25V (power off);Differential Input Impedance; 50 Hz Filtering, Power On: 26 MΩ; 60 Hz Filtering, Power On: 20 MΩ;Input Current; Open Thermocouple Detect Disabled: 2 nA; Open Thermocouple Detect Enabled: 75 nA;Common Mode Rejection; 50 Hz Filtering at DC and fIN=50 Hz: 110 dB; 60 Hz Filtering at DC and fIN=60 Hz: 110 dB;Noise Rejection; 50 Hz Filtering at fIN=50 Hz: 80 dB typ; 60 Hz Filtering at fIN=60 Hz: 80 dB typ;Input Bandwidth; 50 Hz Filtering: 22 Hz; 60 Hz Filtering: 26 Hz;Crosstalk Between Any Two Thermocouple Inputs: -90 dB;Sample Rate: 3 Hz max (per channel); the enabled thermocouple inputs are continuously converted at the maximum A/D converter rate;Common Mode Voltage Range; TCx Channel to TCx Channel: ±1.40V; TCx Channel Relative to Chassis Ground, fIN = 60 Hz: ±3.5 Vac p-p; TCx Channel Relative to Chassis Ground: ±48 Vdc;When thermocouple sensors are connected to different common mode voltages, the channels with floating thermocouples sensors are biased to approximately the average value of the applied common mode voltages. Each of the applied common mode voltages must then be less than or equal to the average common mode voltage ±1.40 V or [CMVapplied = (CMVaverage ±1.4 V)].;Input Noise (50 or 60 Hz Filtering): 510 nV rms;Gain Error (50 or 60 Hz Filtering): 0.004% FSR;Offset Error (50 or 60 Hz Filtering): 3 µV;Measurement Sensitivity (Smallest Change in Temperature That Can Be Detected); Thermocouple Type J, K, T, E, N: 0.05°C; Thermocouple Type R, S: 0.10°C; Thermocouple Type B: 0.15°C;Warm-Up Time: 20 minutes min;Open Thermocouple Detect Response Time: 1 s;CJC Sensor Accuracy (0 to 45°C): ±0.20°C typ, ±0.40°C max;Channel Configuration;Thermocouple (J, K, T, E, R, S, B, N): 32 differential channels Channel configuration is stored on EEPROM external to the isolated microcontroller by the firmware whenever any item is modified. Modification is performed by commands issued from an external application, and the configuration is made nonvolatile through the use of the EEPROM.
- CMRR 50 Hz Filtering at DC and fIN=50 Hz: 110 dB, 60 Hz Filtering at DC and fIN=60 Hz: 110 dB
- Common Mode Voltage TCx Channel to TCx Channel: ±1.40V, TCx Channel Relative to Chassis Ground, fIN = 60 Hz: ±3.5 Vac p-p, TCx Channel Relative to Chassis Ground: ±48 Vdc
- Configuration Parameters Alarm Functionality, Pull-Up/Down Configuration, Thermocouple Type Selection, User-Configurable Input/Output
- Data Interface Ethernet, USB 1.1, USB 2.0, USB 3.0
- Data Interface Note Ethernet Type - 100 Base-TX, 10 Base-T; Protocol - TCP/IP (IPv4 only), UDP;Ethernet: 10/100 Mbps, auto-negotiated;Network Interface Protocols Used: TCP/IP (IPv4 only), UDP, Network Ports Used: UDP: 54211 (discovery), TCP: 54211 (commands), Network IP Configuration: DHCP + link-local, DHCP, static, link-local;Network Name: TC-32-xxxxxx, where xxxxxx are the lower 6 digits of the device MAC address, Network Name Publication: By NBNS (responds to b-node broadcasts, therefore only available on the local subnet);Network Factory Default Settings: Factory Default IP Address: 192.168.0.101, Factory Default Subnet Mask: 255.255.255.0, Factory Default Gateway: 192.168.0.1, Factory Default DHCP Setting: DHCP + link-local enabled, Network Security: Security Implementation: TCP sockets are not opened unless application sends the correct PIN code (stored in non-volatile memory, may be changed by user, default value 0000);Number of Concurrent Sessions: 1, Vulnerabilities: TCP Sequence number approximation;Factory Reset Button: When held for 3 seconds, the LEDs turn off for a short time, indicating a reset is in process. When the LEDs turn back on, reset is complete and the factory default network settings are restored;Ethernet Cable Length, Max: 100 m;Output Configuration: Digital: Open Drain Output;Supported Operating System: Windows PC
- Digital Input Digital: Low = 0 Vdc
- Digital I/O Note Digital Input Number of Inputs: 8 channels (16 when OMB-DAQ-TC-RACK connected to OMB-DAQ-TC-RACK-EXP32) Configuration: Fixed input Input Voltage Range: 0 to 15V Input Type: CMOS (Schmitt trigger) Input Characteristics: 100 k? pull-up resistor, 28.7 kΩ series resistor Maximum Input Voltage Range: 0 to 20V max (power on/off, relative to IGND pins) Pull-Up Configuration: All pins pulled up to 5V via individual 100 k? resistors using slide switch SW5; SW5 default position are on (pulled up) Transfer Rate (Software Paced): 500 port reads per second typ Input High Voltage: 1.3V min, 2.2V max Input Low Voltage: 1.5V max, 0.6V min Schmitt Trigger Hysteresis: 0.4V min, 1.2V max "Digital Output Number of Outputs: 32 channels, shared with alarms (64 when OMB-DAQ-TC-RACK connected to OMB-DAQ-TC-RACK-EXP32) Configuration: Open drain output Output Characteristics: 100 kΩ pull-up, open drain (DMOS transistor) Pull-Up Configuration: All pins pulled up to 5V through individual 100 kΩ resistors using slide switches SW1-SW4; the default positions for SW1-SW4 are on (pulled up) Transfer Rate (Software Paced): Digital output–500 port writes per second typ Output Voltage Range: 0 to 5V: Internal 100 kΩ pull-up resistors connected to 5V by default 0 to 15V: Max (using external pull-up resistor) Ground: Pins labeled IGND are isolated from AGND and chassis ground Off State Leakage Current: 0.1 µA Sink Current Capability: 100 mA max (continuous) per output pin DMOS Transistor On-Resistance (Drain to Source): 4 O" ;Cross talk: -90 dB;Transfer Rate: Input: 500 port reads per second typ, Output: Digital output–500 port writes per second typ;Schmitt Trigger Hysteresis: 0.4V to 1.2V;Sink Current: 100 mA max (continuous) per output pin
- Digital Output Digital: 0 to 15V
- Electrical Connection USB Micro-B Female
- Electrical Output 0 to 5 Vdc
- Height 43.18 mm
- Impedance Input Differential: Power On: 26 MΩ (50 Hz Filtering), Power On: 20 MΩ (60 Hz Filtering)
- Input Configuration Connected Software
- Input Noise Voltage 510 nVrms
- Input Type Thermocouple, Digital
- Input Voltage Note Absolute Maximum Input Voltage: Analog: ±25V (Power On), ±25V (Power Off), Digital: 0 to 20V max (Power On/Off, relative to IGND pins)
- Leakage Current 0.1 μA
- LED Indicators Power and Activity LEDs Blink
- Length 482.6 mm
- Linearity 60 Hz Filtering at fIN=60 Hz: 80 dB typ
- Memory EEPROM: 4096 bytes
- Microcontroller One high-performance 32-bit RISC microcontroller
- Noise Rejection Rejection: 50 Hz Filtering at fIN=50 Hz: 80 dB typ
- Number of Channels, Input Analog: 32
- Operating Temperature, Max 45 °C
- Operating Temperature, Min 0 °C
- Pull-up Resistor 100 kΩ
- Relative Humidity 0 to 90% RH non-condensing
- Sampling Rate 3 Hz (3 updates/second)
- Storage Temperature, Max 85 °C
- Storage Temperature, Min -40 °C
- Supply Current 330 mA
- Supply Power Note Supply Current: 330 mA typ, 610 mA max; 550 mA typ, 1000 mA max (with OMB-DAQ-TC-RACK-EXP32 connected), External Power Input: 5 Vdc ±5% (5 Vdc power supply provided) Voltage specification applies at barrel plug power input. The power supply provided with the device meets this specification at the rated total power supply current. If a different power supply is used, small line resistances could cause significant voltage drop between the power supply and the barrel plug input. Power Switch: Rocker type, External Power Supply (Included): 5 Vdc, 10 W, 5% regulation (model number OMB-DAQ-TC-RACK-PS), External Power Input Voltage Supervisor Limits: 4.0V > Vext > 5.75V: PWR LED = Off (power fault), 4.0V < Vext < 5.75V: PWR LED = On, Chassis Ground Connection: 6-32 screw on rear of enclosure
- Supply Voltage 5 Vdc
- USB Cable Length 5 m
- Warm Up Time 20 min
- Weight 1.73 kg
- Width 128.6 mm
The OMB-DAQ-TC-RACK and OMB-DAQ-TC-RACK-EXP32 offer exceptional performance and accuracy for thermocouple measurement applications at a low cost per channel. Offering both Ethernet and USB ports, the OMB-DAQ-TC-RACK provides 32 channels of 24-bit resolution for medium channel installations. The OMB-DAQ-TC-RACK-EXP32 adds 32 high-precision channels to support larger installations. Accuracy is designed into the product with sigma-delta 24-bit ADCs, differential inputs, thermocouple-to-host isolation and cold-junction compensation (CJC) for each channel to reduce the effects of thermal gradients. With digital alarming notifications when a temperature exceeds programmed limits, the OMB-DAQ-TC-RACK and OMB-DAQ-TC-RACK-EXP32 offer the perfect solution for temperature monitoring applications including server rooms, refrigerated storage, and long-run test cells.
Specifications
(Typical for 25°C (77°F) unless otherwise specified)
These specifications apply to both the OMB-DAQ-TC-RACK and OMB-DAQ-TC-RACK-EXP32 unless noted otherwise.
Thermocouple Input
A/D Converter Type: Delta-Sigma
A/D Resolution: 24-bit
Number of Channels: 32 (64 when OMB-DAQ-TC-RACK is connected to OMB-DAQ-TC-RACK-EXP32)
Filtering Options: 50 Hz or 60 Hz noise filtering, software-selectable
Isolation Between Any Thermocouple Input Channel and Chassis Ground: 500 Vdc absolute max
Channel Configuration: Software-selectable to match thermocouple sensor type
Differential Input Voltage Range: ±78.125 mV
Absolute Maximum Input Voltage (Between any Two TCx Inputs): ±25V (power on), ±25V (power off)
Differential Input Impedance:
50 Hz Filtering, Power On: 26 M?
60 Hz Filtering, Power On: 20 M?
Input Current:
Open Thermocouple Detect Disabled: 2 nA
Open Thermocouple Detect Enabled: 75 nA
Common Mode Rejection:
50 Hz Filtering at DC and fIN=50 Hz: 110 dB
60 Hz Filtering at DC and fIN=60 Hz: 110 dB
Noise Rejection:
50 Hz Filtering at fIN=50 Hz: 80 dB typ
60 Hz Filtering at fIN=60 Hz: 80 dB typ
Input Bandwidth:
50 Hz Filtering: 22 Hz
60 Hz Filtering: 26 Hz
Crosstalk Between Any Two Thermocouple Inputs: -90 dB
Sample Rate: 3 Hz max (per channel); the enabled thermocouple inputs are continuously converted at the maximum A/D converter rate
Common Mode Voltage Range:
TCx Channel to TCx Channel: ±1.40V
TCx Channel Relative to Chassis Ground, fIN = 60 Hz: ±3.5 Vac p-p
TCx Channel Relative to Chassis Ground: ±48 Vdc
When thermocouple sensors are connected to different common mode voltages, the channels with floating thermocouples sensors are biased to approximately the average value of the applied common mode voltages. Each of the applied common mode voltages must then be less than or equal to the average common mode voltage ±1.40 V or [CMVapplied = (CMVaverage ±1.4 V)].
Input Noise (50 or 60 Hz Filtering): 510 nV rms
Gain Error (50 or 60 Hz Filtering): 0.004% FSR
Offset Error (50 or 60 Hz Filtering): 3 µV
Measurement Sensitivity (Smallest Change in Temperature That Can Be Detected):
Thermocouple Type J, K, T, E, N: 0.05°C
Thermocouple Type R, S: 0.10°C
Thermocouple Type B: 0.15°C
Warm-Up Time: 20 minutes min
Open Thermocouple Detect Response Time: 1 s
CJC Sensor Accuracy (0 to 45°C): ±0.20°C typ, ±0.40°C max
Channel Configuration
Thermocouple (J, K, T, E, R, S, B, N): 32 differential channels Channel configuration is stored on EEPROM external to the isolated microcontroller by the firmware whenever any item is modified. Modification is performed by commands issued from an external application, and the configuration is made nonvolatile through the use of the EEPROM.
Digital Input
Number of Inputs: 8 channels (16 when OMB-DAQ-TC-RACK connected to OMB-DAQ-TC-RACK-EXP32)
Configuration: Fixed input
Input Voltage Range: 0 to 15V
Input Type: CMOS (Schmitt trigger)
Input Characteristics: 100 k? pull-up resistor, 28.7 k? series resistor
Maximum Input Voltage Range: 0 to 20V max (power on/off, relative to IGND pins)
Pull-Up Configuration: All pins pulled up to 5V via individual 100 k? resistors using slide switch SW5; SW5 default position are on (pulled up)
Transfer Rate (Software Paced): 500 port reads per second typ
Input High Voltage: 1.3V min, 2.2V max
Input Low Voltage: 1.5V max, 0.6V min
Schmitt Trigger Hysteresis: 0.4V min, 1.2V max
Digital Output
Number of Outputs: 32 channels, shared with alarms (64 when OMB-DAQ-TC-RACK connected to OMB-DAQ-TC-RACK-EXP32)
Configuration: Open drain output
Output Characteristics: 100 k? pull-up, open drain (DMOS transistor)
Pull-Up Configuration: All pins pulled up to 5V through individual 100 k? resistors using slide switches SW1-SW4; the default positions for SW1-SW4 are on (pulled up)
Transfer Rate (Software Paced): Digital output–500 port writes per second typ
Output Voltage Range:
0 to 5V: Internal 100 k? pull-up resistors connected to 5V by default
0 to 15V: Max (using external pull-up resistor)
Ground: Pins labeled IGND are isolated from AGND and chassis ground
Off State Leakage Current: 0.1 µA
Sink Current Capability: 100 mA max (continuous) per output pin
DMOS Transistor On-Resistance (Drain to Source): 4 O
Environmental
Operating Temperature Range: 0 to 45°C (32 to 113°F)
Storage Temperature Range: -40 to 85°C (-40 to 185°F)
Humidity: 0 to 90% RH non-condensing
Mechanical
Dimensions: 482.6 L x 128.6 W x 43.18 mm H (19 x 6.15 x 1.74")
Weight: OMB-DAQ-TC-RACK: 3.8 lb (1.73 kg); OMB-DAQ-TC-RACK-EXP32: 3.2 lb (1.45 kg)
Specifications
(Typical for 25°C (77°F) unless otherwise specified)
These specifications apply to both the OMB-DAQ-TC-RACK and OMB-DAQ-TC-RACK-EXP32 unless noted otherwise.
Thermocouple Input
A/D Converter Type: Delta-Sigma
A/D Resolution: 24-bit
Number of Channels: 32 (64 when OMB-DAQ-TC-RACK is connected to OMB-DAQ-TC-RACK-EXP32)
Filtering Options: 50 Hz or 60 Hz noise filtering, software-selectable
Isolation Between Any Thermocouple Input Channel and Chassis Ground: 500 Vdc absolute max
Channel Configuration: Software-selectable to match thermocouple sensor type
Differential Input Voltage Range: ±78.125 mV
Absolute Maximum Input Voltage (Between any Two TCx Inputs): ±25V (power on), ±25V (power off)
Differential Input Impedance:
50 Hz Filtering, Power On: 26 M?
60 Hz Filtering, Power On: 20 M?
Input Current:
Open Thermocouple Detect Disabled: 2 nA
Open Thermocouple Detect Enabled: 75 nA
Common Mode Rejection:
50 Hz Filtering at DC and fIN=50 Hz: 110 dB
60 Hz Filtering at DC and fIN=60 Hz: 110 dB
Noise Rejection:
50 Hz Filtering at fIN=50 Hz: 80 dB typ
60 Hz Filtering at fIN=60 Hz: 80 dB typ
Input Bandwidth:
50 Hz Filtering: 22 Hz
60 Hz Filtering: 26 Hz
Crosstalk Between Any Two Thermocouple Inputs: -90 dB
Sample Rate: 3 Hz max (per channel); the enabled thermocouple inputs are continuously converted at the maximum A/D converter rate
Common Mode Voltage Range:
TCx Channel to TCx Channel: ±1.40V
TCx Channel Relative to Chassis Ground, fIN = 60 Hz: ±3.5 Vac p-p
TCx Channel Relative to Chassis Ground: ±48 Vdc
When thermocouple sensors are connected to different common mode voltages, the channels with floating thermocouples sensors are biased to approximately the average value of the applied common mode voltages. Each of the applied common mode voltages must then be less than or equal to the average common mode voltage ±1.40 V or [CMVapplied = (CMVaverage ±1.4 V)].
Input Noise (50 or 60 Hz Filtering): 510 nV rms
Gain Error (50 or 60 Hz Filtering): 0.004% FSR
Offset Error (50 or 60 Hz Filtering): 3 µV
Measurement Sensitivity (Smallest Change in Temperature That Can Be Detected):
Thermocouple Type J, K, T, E, N: 0.05°C
Thermocouple Type R, S: 0.10°C
Thermocouple Type B: 0.15°C
Warm-Up Time: 20 minutes min
Open Thermocouple Detect Response Time: 1 s
CJC Sensor Accuracy (0 to 45°C): ±0.20°C typ, ±0.40°C max
Channel Configuration
Thermocouple (J, K, T, E, R, S, B, N): 32 differential channels Channel configuration is stored on EEPROM external to the isolated microcontroller by the firmware whenever any item is modified. Modification is performed by commands issued from an external application, and the configuration is made nonvolatile through the use of the EEPROM.
Digital Input
Number of Inputs: 8 channels (16 when OMB-DAQ-TC-RACK connected to OMB-DAQ-TC-RACK-EXP32)
Configuration: Fixed input
Input Voltage Range: 0 to 15V
Input Type: CMOS (Schmitt trigger)
Input Characteristics: 100 k? pull-up resistor, 28.7 k? series resistor
Maximum Input Voltage Range: 0 to 20V max (power on/off, relative to IGND pins)
Pull-Up Configuration: All pins pulled up to 5V via individual 100 k? resistors using slide switch SW5; SW5 default position are on (pulled up)
Transfer Rate (Software Paced): 500 port reads per second typ
Input High Voltage: 1.3V min, 2.2V max
Input Low Voltage: 1.5V max, 0.6V min
Schmitt Trigger Hysteresis: 0.4V min, 1.2V max
Digital Output
Number of Outputs: 32 channels, shared with alarms (64 when OMB-DAQ-TC-RACK connected to OMB-DAQ-TC-RACK-EXP32)
Configuration: Open drain output
Output Characteristics: 100 k? pull-up, open drain (DMOS transistor)
Pull-Up Configuration: All pins pulled up to 5V through individual 100 k? resistors using slide switches SW1-SW4; the default positions for SW1-SW4 are on (pulled up)
Transfer Rate (Software Paced): Digital output–500 port writes per second typ
Output Voltage Range:
0 to 5V: Internal 100 k? pull-up resistors connected to 5V by default
0 to 15V: Max (using external pull-up resistor)
Ground: Pins labeled IGND are isolated from AGND and chassis ground
Off State Leakage Current: 0.1 µA
Sink Current Capability: 100 mA max (continuous) per output pin
DMOS Transistor On-Resistance (Drain to Source): 4 O
Environmental
Operating Temperature Range: 0 to 45°C (32 to 113°F)
Storage Temperature Range: -40 to 85°C (-40 to 185°F)
Humidity: 0 to 90% RH non-condensing
Mechanical
Dimensions: 482.6 L x 128.6 W x 43.18 mm H (19 x 6.15 x 1.74")
Weight: OMB-DAQ-TC-RACK: 3.8 lb (1.73 kg); OMB-DAQ-TC-RACK-EXP32: 3.2 lb (1.45 kg)
PDFs & Manuals
Software & Drivers
Show Ratings & Reviews
Is the ethernet communication protocol publicly available? We would like to communicate with the DAQ directly from an embedded application, without universal library. Thank you
Thank you for your question. Please e-mail your question to our Das Engr Dept, DAS@OMEGA.COM.
Date published: 2020-07-15
Can you purchase the item calibrated to NIST?
OMB-DAQ-TC-RACK is calibrated with NIST traceable equipment, but at this moment calibration cert is only included when requested at the time of purchase. After discussing with the product manager we decided to include the cert on all future batches at no additional cost. Please email us at das@omega.com if you have any further questions.
Date published: 2019-05-21
Is the software compatible with Windows 10?
Thank you for your question. Yes, software is compatible with WINDOWS 10.
Date published: 2020-04-06
How well do the OMB-DAQ-TC-RACK devices interface with a PLC? What is the minimum time to read in all 32 channels? I know I can expand to 64 channels but how about +/- 300 channels. Would 300 channels require (5) 64 channel setups?
Thanks for connecting with Omega. This unit is not designed to interface with a PLC. The max sample rate is 3 hz per channel. There is no provision for more than 64 inputs so you would need multiple setups and multiple computers running the software to do anything more than 64 channels. Please contact our Tech Support if you need further assistance finding a product to fit your application needs.
Date published: 2019-05-22
Will this interface to a SCADA system over Ethernet I/P such as Ignition (Inductive Automation) for data acquisition?
Hello
It will not interface to a SCADA system. You will need to use our universal library which is included in the software CD to communicate with the OMB-DAQ-TC-RACK.
Date published: 2019-08-28