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

Advanced features
Applications
• A multifunction user interface consisting of three pushbuttons and
a 3-digit LED display for programming.

Application
• The 2261 converts bipolar mV signals from transducers supplied
directly by the device to standard current / voltage signals.
• The 2261 is suitable for load cell application as well as other
applications such as tank filling and draining, weighing with a
taring function, measurement of cable tensile force, level control,
signal conversion / amplification etc.

Technical characteristics
• Front error LED.
• The analog input can be programmed for voltage in the range -
40...100 mVDC.
• The digital signal can be selected as either NPN or PNP.
• Taring can either be by way of the digital input or from the front
interface.
• The analog output can be programmed to current in the range
0...20 mA or voltage in the range 0...10 VDC.
• Transducer supply which can be programmed to 5...13 VDC from
the front. It is up to the customer to ensure a max. load of 230 mA
(e.g. 6 parallel 350 Ω load cells).
• Sense input (with transducer supply used) for compensation for
cable resistance to the transducer.
• Mounting for a standard 11-pole socket which can be adapted for
DIN rail or plate use with PR’s 7023 adaptor and 7024 mounting
keying.

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Environmental Conditions Output specifications
Operating temperature................................... -20°C to +60°C Current output
Calibration temperature................................. 20...28°C Signal range................................................... 0...20 mA
Relative humidity............................................ < 95% RH (non-cond.) Min. signal range............................................ 5 mA
Protection degree........................................... IP50 Load (@ current output)................................. ≤ 600 Ω
Load stability.................................................. ≤ 0.01% of span / 100 Ω
Mechanical specifications Current limit.................................................... < 23 mA
Dimensions (HxWxD)..................................... 80.5 x 35.5 x 84.5 mm (D is
without pins) Voltage output through internal
Weight approx................................................ 130 g shunt.............................................................. See manual for details
of span........................................................... = of the presently selected
Common specifications range
Supply
Observed authority requirements
Supply voltage............................................... 19.2...28.8 VDC
EMC............................................................... 2014/30/EU
Max. required power...................................... 7.2 W
RoHS.............................................................. 2011/65/EU
Internal power dissipation.............................. 2.2 W
EAC................................................................ TR-CU 020/2011
Response time
Response time (programmable).................... 0.06...999 s
Signal / noise ratio......................................... Min. 60 dB
Updating time................................................. 20 ms
Signal dynamics, input................................... 17 bit
Signal dynamics, output................................. 16 bit
Effect of supply voltage change..................... < ±0.002% of span / %V
Temperature coefficient................................. < ±0.01% of span / °C
Linearity error................................................. < 0.1% of span
Auxiliary voltage: Transducer
supply............................................................. 5...13 VDC
Load (max.).................................................... 230 mA
EMC immunity influence................................ < ±0.5% of span

Input specifications
Common input specifications
Max. offset...................................................... 70% of selec. max. value
Voltage input
Measurement range....................................... -40...100 mV
Min. measurement range (span).................... 10 mV
Input resistance.............................................. > 10 MΩ
Overrange...................................................... 0...999% of selected
measurement range
NPN, digital input........................................... Pull up 24 VDC / 6.9 mA
PNP, digital input........................................... Pull down 0 VDC / 6.9 mA
Trig level low, NPN/PNP................................ < 6 VDC
Trig level high, NPN/PNP............................... > 10.5 VDC
Pulse length................................................... > 30 ms
2261-022525