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參數(shù)資料
| 型號： | T773 |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | Frequency Input, Isolating Field Configurable Two-Wire Transmitter |
| 中文描述： | 頻率輸入，隔離現(xiàn)場配置的二線制變送器 |
| 文件頁數(shù)： | 1/4頁 |
| 文件大?。?/td> | 278K |
| 代理商： | T773 |
Desc ription
The T773 isolating two-wire transmitter has 5 input ranges and 2 output ranges, all of which are
field selectable via top-accessed DIP switches. The T773 can accept square, triangle or pulse
waveforms up to 18KHz with amplitudes from 10mVrms to 35V peak-to-peak. The T773 provides
1000Vrms of transformer-coupled isolation with outputs of either 4-20mA or 10-50mA. Current
outputs are in proportion to a selected frequency input.
The T773 has 30% zero “turn-up” and 80% span “turn-down” adjustments within any user-selected
input range. For example, Range 3 of Table 1 specifies 0 to 2100Hz with a minimum span of 420Hz
(2100Hz - 420Hz = 1680Hz, or 80%). This 80% adjustability allows the user to field calibrate the
unit for the maximum range of 0 to 2100Hz down to the minimum range of 0 to 420Hz. The maximum
obtainable offset is 30% of the calibrated span: a calibrated range of 0 of 1000 Hz can be offset by
300Hz (e.g., 300Hz to 1000Hz).
Applic ation
The T773 is useful in any application requiring isolation of a 2-wire loop current from a pulse output
transducer, such as a magnetic pickup or a turbine flowmeter. The output of the T773 can be used
to drive a digital meter for direct display of flow or velocity, or to interface with a computer or PLC
for monitoring and control applications.
The T773 is CSA approved for intrinsically safe operation in Class I, Division 1, Groups A, B, C
and D hazardous locations when installed per manufacturing drawing number.
Options
U
Urethane Coating of internal circuitry for protection from corrosive atmospheres.
TRANSPAK
TM
T773
Benefits
Eliminates Ground Loops
Digitally-Synthesized,
Field Configurable Ranges
(105Hz to 18kHz)
Wide Ranging
Zero and Span Adjustability
Direct Magnetic Pickup Input
Velocity/Flow Applications
Protects Equipment with
1000VRMS Isolation
Frequency I nput, I solating
Field Configurable
Tw o-W ire Transmitter
Provides an Isolated Current Loop in
Proportion to a Frequency Input
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