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56-Channel Thermocouple Input Module for OMB-DAQSCAN-2000 Series
TRODEKS Engineering | Thermocouples, Pressure Transducers, Flow Meters, PID Controllers
  • 56 Thermocouple Channels in One Compact and Rugged Enclosure
  • Supports Any Thermocouple Type on Any Channel
  • Very Low Cost per Channel and Very High-Channel Density
  • Attach Up to 16 Units Together for Up to 896 Channels per A/D Mainframe
 Manuals (contact with email : [email protected])


The OMB-DBK90 module provides56 channels of high-accuracythermocouple (TC) inputs. TheOMB-DBK90 is ideally suited forhigh-channel-count TC applications,with a maximum TC capacity of 896channels per system. For largerchannel-count applications, multiplemainframes can be combined fora maximum channel capacity of3584 channels. Thermocouples attach to theOMB-DBK90 via mini-TC inputconnectors, and any TC typecan be installed into any channel.Each row of 14 TC inputs hasa separate cold-junction sensorto ensure accurate readings.

OMB-DBK90 modules are housedin a rugged all-metal packagethat can be connected to anOMB-DAQSCAN-2000 and rack-mountedwith an optional rack-mount kit.When multiple OMB-DBK90’s aremounted together, a male andfemale P1 connector on either sideof the unit provides all systemconnections so that only a singlecable is required back to the A/Dmainframe. For distributedapplications, such as throughout thecabin of a vehicle, OMB-DBK90modules can be mounted asseparate units. Up to 20' of cablecan be used to connectOMB-DBK90 modules.

Each OMB-DBK90 has a built-inauto-zero channel and a CJCchannel. The OMB-DBK90 canmeasure one TC channel in 3 ms,14 TC channels in 16 ms, and all 56TC channels in 61 ms.An OMB-DBK90 based system of896 channels can be measured in976 ms. This speed is slower thanother OMB-DBK modules to ensurethat the TC measurements areaccurate, low-noise, and stable.Typical measurement accuraciesare better than 0.7°C, with channel-to-channel variation typically lessthan 0.5°C. If OMB-DBK90 measurements aremixed with measurements fromother OMB-DBK options, the othermeasurements can be made at theirstandard 5 or 10 µs/channel rate.

System Compatibility:
Attaches to an OMB-DAQSCAN-2000
System Connector: Male and female DB37 for unit-to-unit mating
and mating with P1 on the acquisition mainframe
TC Connector: Mini-TC connectors
ACOM Connector Type: Pomona model 5936-0
Inputs: 56 differential TC inputs, open TC detection per channel
TC Types: J, K, T, E, S, R, B, N28, N14
Speed: 1 channel in 3 ms, 14 channels in 16 ms,56 channels in 61 ms
285 W x 88 D x 52 mm H (11 x 3.44 x 2.05")
Weight: 0.96 kg (2.12 lb)
Power Requirements: 40 mA max from ±15 V;40 mA max from 5 V; 1400 mW total
Input Impedance: 4 M Ω (differential) in parallelwith 400 pF
Input Bandwidth: 1 kHz
Minimum Resolution: 0.1°C for all TC types
TC Accuracy: Valid for one year at 25°C ambient (see table)
Operating Temperature:
-30C to 70°C (-22 to 158°F)
Relative Humidity: 0 to 95% non-condensing
Temperature Coefficient of Accuracy for Type TTC: ±0.05°C for every °C away from 25°C
Channel-to-Channel Crosstalk: -90 dB typ (0 to 100 Hz)
DC CMRR: -80 dB typ
AC CMRR: -80 dB typ (0 to 60 Hz)
Maximum Common Mode Voltage: ±10 V
Overvoltage Protection: ±40 V
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