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Summary of Contents for Omega OMB-DAQ-TC-RACK
- Page 1 User’s Guide Shop online at omega.com e-mail: info@omega.com For latest product manuals: www.omegamanual.info OMB-DAQ-TC-RACK 32-Channel USB/Ethernet Based Thermocouple Input Data Acquisition System...
- Page 2 Tel: (203) 359-1660 Fax: (203) 359-7700 e-mail: info@omega.com For Other Locations Visit omega.com/worldwide The information contained in this document is believed to be correct, but OMEGA accepts no liability for any errors it contains, and reserves the right to alter specifications without notice.
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Page 3: Table Of Contents
Installing the hardware ............................8 Installing on USB................................8 Installing on Ethernet ................................ 8 IP address settings ................................9 Setting up the OMB-DAQ-TC-RACK for communication across networks ........... 10 Calibrating the hardware........................... 10 Factory calibration ................................10 Field calibration ................................10 Restoring factory default network settings ....................... 10 Chapter 3 Functional Details .......................... - Page 4 OMB-DAQ-TC-RACK User's Guide Power ................................23 USB .................................. 24 Network ................................24 Ethernet connection .................................24 Network interface ................................24 Network factory default settings ............................25 Network security ................................25 LED displays and the factory reset button ......................25 Environment ..............................25 Mechanical ............................... 25...
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Page 5: Preface
Preface About this User's Guide What you will learn from this user's guide This user's guide describes the Omega Engineering OMB-DAQ-TC-RACK data acquisition device and lists device specifications. Conventions in this user's guide For more information Text presented in a box signifies additional information related to the subject matter. -
Page 6: Introducing The Omb-Daq-Tc-Rack
MAC address. xxxxxx USB interface The OMB-DAQ-TC-RACK is a USB 2.0 full-speed device that is compatible with USB 3.0 ports. The device is also compatible with USB 1.1 ports. 40-pin ribbon cable for the EXPANSION connector is included with the OMB-DAQ-TC-RACK-EXP32. -
Page 7: Functional Block Diagram
OMB-DAQ-TC-RACK User's Guide Introducing the OMB-DAQ-TC-RACK Functional block diagram Device functions are illustrated in the block diagram shown here: Figure 1. OMB-DAQ-TC-RACK functional block diagram... -
Page 8: Installing The Omb-Daq-Tc-Rack
Connecting the external power adapter Power to the OMB-DAQ-TC-RACK is provided with the 5 V external power adapter (OMB-DAQ-TC-RACK- PS). Connect the adapter cord to the power connector on the OMB-DAQ-TC-RACK device, and plug the AC adapter into an electrical outlet. -
Page 9: Ip Address Settings
Link Local Only The OMB-DAQ-TC-RACK is assigned a link-local IP address by the Windows PC or other host that supports link-local addressing. A link-local address is valid only for communications between the OMB-DAQ-TC-RACK and the device to which it is connected. -
Page 10: Setting Up The Omb-Daq-Tc-Rack For Communication Across Networks
Setting up the OMB-DAQ-TC-RACK for communication across networks In order to communicate with the OMB-DAQ-TC-RACK from a computer connected to a different network – such as over the Internet – you must change the network configuration of the network router. -
Page 11: Chapter 3 Functional Details
The maximum communication distance without using a repeater is 100 meters. External power connector Connect the OMB-DAQ-TC-RACK-PS power supply to this connector. The power supply provides 5 VDC, 2 A power to the OMB-DAQ-TC-RACK. TC input connectors, measurements, and LED A thermocouple consists of two dissimilar metals that are joined together at one end. - Page 12 Figure 4. OMB-DAQ-TC-RACK common mode voltage connections example Cold junction compensation (CJC) Each TC input on the OMB-DAQ-TC-RACK has a high-resolution CJC sensor. When you connect the thermocouple sensor leads to the sensor input channel, the dissimilar metals at the OMB-DAQ-TC-RACK terminal blocks produce an additional thermocouple junction.
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Page 13: Digital I/O
I/O signal source is 1 foot. Digital inputs The OMB-DAQ-TC-RACK provides eight digital inputs with rates of 500 port reads or single bit reads per second. Digital input voltage ranges of 0 V to 15 V are permitted, with thresholds of 0.6 V (low) and 2.2 V (high). - Page 14 Figure 5. Digital input connection example Digital outputs/temperature alarms The OMB-DAQ-TC-RACK has 32 digital outputs which are open-drain. Each DO bit has a 100 kΩ pull-up resistor and can sink up to 100 mA for direct drive applications. Use the eight PULL-UP ENABLE –...
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Page 15: Led Indicators
When pull-up is disabled for a digital bit, the bit is left floating. LED indicators The OMB-DAQ-TC-RACK has four LEDs that indicate the power, communication, alarm, and open TC status... -
Page 16: Expansion Connector
USB/shielded Ethernet connection already grounds the OMB-DAQ-TC-RACK and a connected OMB-DAQ-TC-RACK-EXP32. RESET button Press and hold this button to restore the OMB-DAQ-TC-RACK to its factory default network settings. Refer to Restoring factory default network settings on page 10 Both the POWER and ACTIVITY LEDs blink in firmware upgrade mode. -
Page 17: Mechanical Drawings
OMB-DAQ-TC-RACK User's Guide Functional Details Mechanical drawings Figure 9. Enclosure dimensions - rear Figure 8. Enclosure dimensions - front... - Page 18 OMB-DAQ-TC-RACK User's Guide Functional Details Figure 10. Enclosure dimensions – side Figure 11. Circuit board dimensions...
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Page 19: Chapter 4 Specifications
Chapter 4 Specifications All specifications are subject to change without notice. Typical for 25 °C unless otherwise specified. Specifications in italic text are guaranteed by design. Thermocouple input Table 1. Generic analog input specifications Parameter Condition Specification A/D converter type Delta-Sigma A/D resolution 24-bit... -
Page 20: Channel Configuration
OMB-DAQ-TC-RACK User's Guide Specifications Calibration method Factory Recommended warm-up time 20 minutes min Calibration interval 1 year (factory calibration) Note 1: The enabled thermocouple inputs are continuously converted at the maximum A/D converter rate. Note 2: When thermocouple sensors are connected to different common mode voltages, the channels with floating thermocouples sensors will be biased to approximately the average value of the applied common mode voltages. -
Page 21: Accuracy
OMB-DAQ-TC-RACK User's Guide Specifications Accuracy Thermocouple measurement accuracy Table 4. Thermocouple accuracy specifications, including CJC measurement error. All specifications are (±). Sensor Sensor Accuracy Error Accuracy Error Accuracy Error Accuracy Error Type Temperature Maximum (°C), Typical (°C), Maximum (°C), Typical (°C), (°C) -
Page 22: Digital Input/Output
OMB-DAQ-TC-RACK User's Guide Specifications Digital input/output Table 5. Digital input specifications Parameter Specification Number of inputs 8 channels Configuration Fixed input Input voltage range 0 V to +15 V Input type CMOS (Schmitt trigger) 100 kΩ pull-up resistor, 28.7 kΩ series resistor... -
Page 23: Temperature Alarms
OMB-DAQ-TC-RACK User's Guide Specifications Temperature alarms Table 7. Temperature alarm specifications Parameter Specification Number of alarms 32, shared with digital output 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 Alarm functionality determined by the alarm options and input temperature. -
Page 24: Usb
OMB-DAQ-TC-RACK User's Guide Specifications Note 7: 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. -
Page 25: Network Factory Default Settings
ACTIVITY LEDs blink in firmware upgrade mode. On when there is a valid connection and blinks when a command is sent to the ACTIVITY LED OMB-DAQ-TC-RACK. Both the POWER and ACTIVITY LEDs blink in firmware upgrade mode. ALARM LED Indicates that an alarm condition is met. -
Page 26: Signal I/O Connectors
OMB-DAQ-TC-RACK User's Guide Specifications Signal I/O connectors Table 19. Connector specifications Parameter Specification User accessible I/O connectors Thermocouple inputs, digital I/O connector, expansion connector, chassis ground (excluding USB and Ethernet) Thermocouple connector type Thermocouple Mini-Jack (Omega PCC-SMP-V-U-100) Digital I/O connector type... - Page 27 Isolated Analog GND RSVD Reserved AGND Isolated Analog GND EXP_DETECT EXP detection AGND Isolated Analog GND Note 8: Power supplies (+12 VA, +5 VA, 3.3 VA) located at connector J34 are intended for use with the OMB-DAQ-TC-RACK-EXP32 expansion device only.
- Page 28 CONDITIONS: Equipment sold by OMEGA is not intended to be used, nor shall it be used: (1) as a “Basic Component” under 10 CFR 21 (NRC), used in or with any nuclear installation or activity;...
- Page 29 Where Do I Find Everything I Need for Process Measurement and Control? OMEGA…Of Course! Shop online at omega.com TEMPERATURE M U Thermocouple, RTD & Thermistor Probes, Connectors, Panels & Assemblies M U Wire: Thermocouple, RTD & Thermistor M U Calibrators & Ice Point References M U Recorders, Controllers &...
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