TMG2000MS Micro Controller
- INTRODUCTION:
As a leader in the development of innovative and cost effective support solutions for real-time users, TECHNOLOGY MARKETING GROUP (TMG) is offering its TMG-2000MS. The TMG-2000MS is the first in a complete line of support tools which will monitor, alarm, graph, and provide the user with a "pre-failure" record so that corrective measures can be undertaken quickly and accurately before full shutdown occurs.
The basic building blocks of the TMG-2000MS allow it to be adapted to monitoring tasks over and above the basic measuring elements of power voltages/RMS, temperature, phase angle, digital I/O, and control functions. The simple-to-use, yet powerful graphing capabilities along with ease of configurability can provide for the automation of many other functions, allowing a support organization to adddress system failures proactively rather than reactively.
- OVERVIEW
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The TMG2000 is a complete, Delta-Sigma high-resolution data acquisition system for the Universal Serial Bus (USB). It serves as a general purpose A/D converter or as a built-in interface for a wide variety of instrumentation. Up to 32 TMG2000s can be connected to a single USB port using inexpensive hubs. Two analog input channels are provided, along with eight digital inputs and eight digital outputs. Optional cards are available to expand the TMG2000pcb to more digital and analog channels.
The analog input range is +/- 5 volts, true differential. The maximum
single-channel data rate is 1000 Hz at 20 bits effective resolution.
Both channels can be scanned at 100 Hz with effective resolution of 20
bits. As the unit is slowed down, it quickly gains effective bits to
22 bits at 200 Hz and 22.5 at 50 Hz for single-channel operation. The
input impedance is 10^13 and the DC common mode rejection is typically
-100 dB. The isolated portion of the TMG2000 operates from a single
unregulated, low-power supply. The TMG2000 is available in two
configurations, internal PC mounting or external case.
Multiple A/Ds can be split between 32 applications, or all used by one, or anything in between. Units can be connected or disconnected on the fly, without interrupting other ongoing acquisition.
SPECIFICATIONS - A/D TYPE - 24-bit delta-sigma converter with micro controller supervisor and
optical isolation.
- MONOTONICITY - 23 bits
- LINEARITY - +/-0.002%
of full scale.
- DIFFERENTIAL INPUT RANGE - +/-5 volts
- DC COMMON MODE RANGE - +/-6.5 volts
- DC COMMON MODE REJECTION - -100 dB typical
- ANALOG INPUTS - 2, multiplexed true differential protected to +/-60 volts
- INPUT IMPEDANCE - 10^13 ohms typical
PROGRAMMABLE DATA RATE - 50 to 1000 Hz, lower rates generated - digital averaging.
EFFECTIVE RESOLUTION
Effective resolution is defined as total resolution in bits minus RMS noise in bits. Figures below use an over sampling ratio of four.
- DIFFERENTIAL INPUT RANGE - +/-5 volts
-
Rate Effective Resolution in Bits
1000
20
500
21
200
22
50
22.5
SCANNING MODE
Three scan types are available, single channel, multi-channel, and a calibration scan that adds a reading of the zero channel at the end of each scan for offset drift compensation. The max number of data points per second in multi-channel scanning mode is 200. Any of the three scan types can add a digital input into the data stream after each conversion. That feature allows maximum timing accuracy for digital events.
- DIGITAL INPUTS - 8 bits, contact closure or 5 volt logic compatible.
- DIGITAL OUTPUTS - 8 latched, ruggedized, double-buffered 5V outputs.
- DIGITAL INPUTS - 8 bits, contact closure or 5 volt logic compatible.
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- POWER REQUIREMENT
11 to 15 vdc, regulated or unregulated, for isolated circuitry or 15 to 30 vdc with pre-regulator option.
- TYPICAL POWER CONSUMPTION
The micro controller operates as a low-power USB bus-powered device. The analog input and digital I/O requires 25 MA (add drive current for active digital outputs, up to 20 MA each).
- TYPICAL POWER CONSUMPTION