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SR2101
DC INPUT, ISOLATED
FIELD RANGEABLE
TWO-WIRE TRANSMITTER

FEATURES
bulletProvides DC Output Proportional to a DC Voltage or Current Input
bulletFully Isolated Input/Output
bulletUnlimited
bulletChoice of Input Ranges via Interchangeable Range Cards
bulletReverse Polarity-Protected
bulletTest Points for Loop Current Monitoring Without Breaking Loop Circuit
bullet50 mm Diameter Case - 33 mm Mounting Hole Spacing
bulletNEMA-4 and Explosion-Proof Connection Heads Available
bulletLow Cost
bullet5 + 5 Year Warranty


DESCRIPTION

The SR2101 is a low-cost, reliable, DC input two-wire transmitter for field or panel mounting in various industrial housings and enclosures. It provides a DC output current (4/20 mA) proportional to a voltage or current input.  The output is galvanically isolated from the input.

The SR2101 includes filtering and conditioning to reduce susceptibility to transients and noisy operations.  It uses a feedback VCO to develop a pulse train with a duty cycle proportional to the input signal amplitude.  This pulse train is coupled through a pulse transformer to the output circuitry, where the duty cycle data is converted to a proportional 4/20 mADC output level.  A plug-in range card permits user ranging to the required voltage or current input range.  The output ZERO and SPAN controls are accessible through the top of the case.  Zero is adjustable ± 20% and span +5/-55%.  Terminations are made to screw  terminal connectors on top of the case.

Test points located on the SR2101 front panel allow monitoring of loop current value, using a milliammeter, without breaking the loop current.

TYPICAL APPLICATIONS

Remote data acquisition.  Voltage to current conversion and isolation. Elimination of ground loops and common mode signals.

MOUNTING

The SR2101 can be mounted in a connection head (TSH-A6L), explosion-proof housing (XJAY), or on a flat surface using the two 4.5 mm diameter mounting holes provided. Standard 33 mm hole center spacing allows for mounting in most connection heads. The 5.08 mm center hole allows clearance for input wiring.  An optional DIN-Rail mounting kit is available (DMP2000).


SPECIFICATIONS

INPUT RANGE
 Voltage
  any range between ± 128 V max
  (minimum full scale span 16 mV)
Current
  (internal shunt)
  any range between ± 0.1 A max
  (minimum full scale span 10 µA)

OUTPUT RANGE
 4/20 mA
  Current limited = 28 mA

RESPONSE TIME
 - Step Change
150 ms for 99% of final value

OFFSET CANCEL
 can cancel any offset from
-100% to +100% of span

INPUT IMPEDANCE
 V In < 1 V: > 10 megohms
V In > 1 V: >  1  megohm

I In: range dependent:

Current Input: Input Shunt Value:

0/1   mA
0/5   mA
4/20  mA
10/50  mA
0/100 mA
100.0 ohms
49.9 ohms
61.9 ohms
20.0 ohms
20.0 ohms
COMMON MODE REJECTION
 120 dB, DC to 60 Hz

OPERATING TEMPERATURE
 -13°F to 176°F
-25°C to  80°C

MAX LOAD RESISTANCE (kilohms)
=[(V supply - 10)/20 mA]

TEMPERATURE STABILITY
± 0.015% of span per°C

LINEARITY
 Better than ± 0.05% of span

ACCURACY
± 0.1% of span

POWER
 10-36 VDC, polarity protected

ISOLATION, OUTPUT TO INPUT
 1000 Volts RMS sinewave

SUPPLY VOLTAGE EFFECT
 0.02% of span max, 10 to 36 V

 

*Within specified range limits

ORDERING INFORMATION

SR2101, ( )
| (examples)
| 0/10 V
| 1/5  V
| -1/1  V
| 4/20 mA
| Input Range

Example: SR2101,0/10V