Omega OMB-DAQ-TC-RACK, User Manual

Page 1: ...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 Shop online at omega comSM User sGuide...

Page 2: ...SA Canada only Engineering Service 1 800 872 9436 USA Canada only Tel 203 359 1660 Fax 203 359 7700 e mail info omega com For Other Locations Visit omega com worldwide omega com info omega com The inf...

Page 3: ...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 Det...

Page 4: ...4 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...

Page 5: ...ation to help you avoid injuring yourself and others damaging your hardware or losing your data bold text Bold text is used for the names of objects on a screen such as buttons text boxes and check bo...

Page 6: ...ector USB 2 0 or 10 100 Ethernet interface Powered by the included 5 V external power adapter OMB DAQ TC RACK PS Ethernet interface The OMB DAQ TC RACK has a built in 10 100 BASE T auto negotiation hi...

Page 7: ...MB DAQ TC RACK User s Guide Introducing the OMB DAQ TC RACK 7 Functional block diagram Device functions are illustrated in the block diagram shown here Figure 1 OMB DAQ TC RACK functional block diagra...

Page 8: ...provided to a to a USB port on a computer running Windows Windows finds and installs the device driver automatically and notifies you that the device is ready to use Installing on Ethernet The OMB DAQ...

Page 9: ...ortly after it is powered up and attached to the network 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 l...

Page 10: ...on The Omega Engineering Manufacturing Test department performs the initial factory calibration Return the device to Omega Engineering when calibration is required The recommended calibration interval...

Page 11: ...nnector Figure 3 OMB DAQ TC RACK rear panel components USB connector The USB connector provides USB communication Ethernet connector The OMB DAQ TC RACK has one 10 100 BASE T auto negotiation high spe...

Page 12: ...e voltage is calculated as follows 11 4 V 10 V 8 6 V 3 10 V Each TC channel becomes biased to the average common mode voltage of 10 V Each common mode voltage must then be within the 10 V 1 4 V limits...

Page 13: ...cause an error voltage to develop across the lead resistance of the TC that is indistinguishable from the thermocouple voltage you are measuring You can estimate this error voltage with the following...

Page 14: ...an also use the alarm outputs to control a device or application that indicates when a temperature threshold has been exceeded When its pull up is disabled a DO bit can be used to control a device nee...

Page 15: ...output line can be used for normal operation Alarm enabled active low output output line goes low when alarm condition is met Alarm enabled active high output output line goes high when alarm conditi...

Page 16: ...arately for applications that need additional analog thermocouple input and digital I O channels A 40 pin expansion cable is included with the OMB DAQ TC RACK EXP32 Chassis ground connector Provides a...

Page 17: ...OMB DAQ TC RACK User s Guide Functional Details 17 Mechanical drawings Figure 8 Enclosure dimensions front Figure 9 Enclosure dimensions rear...

Page 18: ...OMB DAQ TC RACK User s Guide Functional Details 18 Figure 10 Enclosure dimensions side Figure 11 Circuit board dimensions...

Page 19: ...nput 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 N...

Page 20: ...d CMVaverage 1 4 V Note 3 Measurement sensitivity is the smallest change in temperature that can be detected Channel configuration Table 2 Channel configuration specification Sensor Category Condition...

Page 21: ...1 254 700 0 937 0 424 1 136 0 520 1820 0 610 0 300 1 056 0 467 E 200 1 754 0 811 1 933 0 880 0 0 775 0 355 0 806 0 369 1000 0 657 0 323 0 989 0 437 T 200 2 005 0 923 2 207 1 005 0 0 836 0 382 0 874 0...

Page 22: ...e 1 5 V max 0 6 V min Schmitt trigger hysteresis 0 4 V min 1 2 V max Table 6 Digital output specifications Parameter Specification Number of outputs 32 channels shared with alarms Configuration Open d...

Page 23: ...t output line goes high when alarm condition is met Enabled active low output output line goes low when alarm condition is met Alarm output may be latched and will not clear unless explicitly cleared...

Page 24: ...Self powered no USB current consumed Network Ethernet connection Table 12 Ethernet connection specifications Parameter Specification Ethernet type 100 Base TX 10 Base T Communication rates 10 100 Mbps...

Page 25: ...fication POWER LED top Indicates power on Blinks when blink command is sent Both the POWER and ACTIVITY LEDs blink in firmware upgrade mode ACTIVITY LED On when there is a valid connection and blinks...

Page 26: ...r input J4 TC3 CH3 sensor input J20 TC19 CH19 sensor input TC3 CH3 sensor input TC19 CH19 sensor input J5 TC4 CH4 sensor input J21 TC20 CH20 sensor input TC4 CH4 sensor input TC20 CH20 sensor input J6...

Page 27: ...29 35 DOUT30 Digital Output 30 Alarm Output 30 36 DOUT31 Digital Output 31 Alarm Output 31 37 IGND Isolated Digital GND 38 IGND Isolated Digital GND 39 IGND Isolated Digital GND 40 IGND Isolated Digi...

Page 28: ...therwise shall not exceed the purchase price of the component upon which liability is based In no event shall OMEGA be liable for consequential incidental or special damages CONDITIONS Equipment sold...

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