2261V103-UK 5
mV transmitter 2261
• Load cell amplifier
• mV to current / voltage conversion
• Front-programmable / LED display
• Relative calibration of input span
• NPN / PNP input for external taring
• Supply for standard transducers
Application
Tank filling and draining, weighing with a taring function, measurement of cable tensile force, level control and signal
conversion / amplification.
The 2261 converts bipolar mV signals from transducers supplied directly by the module to standard current / voltage signals.
The 2261 is suitable for load cell applications. By way of the relative calibration function the scale can be tared, i.e. 0 and
100% calibrated without the need of the equivalent load. By way of the taring function the measured range is set to either
0% when filling or 100% when draining.
Technical characteristics
The 2261 is microprocessor-controlled and basic-calibrated meaning that input and output can be programmed acc. to the
requested signal range without any readjustment. This guarantees high accuracy and flexibility.
The user interface consists of a 3-digit display and 3 front function keys which are used for taring or change of input / output
signal range.
Inputs
Analog input
The analog input can be programmed for voltage in the range -40...100 mVDC with a min. span of 10 mV and max. offset of
70% of max. mV value.
A percentage overrange of the selected measurement range can be defined, thereby making the unit react to an mV input
outside the selected 0 and 100% range.
The display will show the input percentage.
The output must be scaled in such a way that the selected overrange is within the allowed output signal range.
Digital input
The digital signal can be selected as either NPN (short circuit to gnd.), or PNP (+24 VDC).
Taring
Taring can either be by way of the digital input or from the front.
At 0% taring, the analog input will show 0% after taring. At 100% taring, the analog input will show 100% after taring,
corresponding to tara + net weight = gross weight.
The analog input span is not changed but is kept relative to the new offset value.
The taring function can be disabled at the front.
Standard current / voltage output
The analog output can be programmed to current in the range 0...20 mA or voltage in the range 0...10 VDC with a min. span of
5 mA or 250 mVDC with max. offset of 50% of the selected max. value.
By short-circuiting pins 2 and 3, the voltage signal is available between pins 2 and 1.
For voltage signals in the range 0...1 VDC, a 50 Ω shunt (DP 2-1) is applied; in the range 0...10 VDC, a 500 Ω shunt (DP 2-2) is
applied.
When both voltage and current signals are used simultaneously, the mA loop must go to ground through the internal shunt.
Front error LED
At an incorrect output, the red LED will flash, e.g. at overrange saturation.
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