Impulse DSCL21 User Manual
DSCL21
Loop Powered Isolator - DIN Mount
Description
Each DSCL21 loop powered isolator provides a single channel of analog
signal protection by electrically isolating its input from output for any DC process
signal in the range of 0-20mA (or 4-20mA). The DSCL21 operates passively,
obtaining its power from the transmitted signal (see Figure 1).
The input signal is chopped by a proprietary DC chopper circuit, isolation is
provided by transformer coupling, a proprietary technique is used to suppress
transmission of common mode spikes or surges, the output signal from the
secondary of the transformer is reconstructed to the original input signal.
Industrial Loop Isolators and Transmitters
▲
Features
No Power Supply Required, Signal Powered
from 0-20mA (or 4-20mA) Input
Simplified Wiring for Fast Installation
Narrow 12.5mm DIN Package for
High-Density Mounting
No Recalibration or Maintenance Required
500Vrms Transformer Isolation
Prevents Ground-Loop Problems
Prevents the Transfer of Interference
Voltages and Currents
High Accuracy Over Full Span
CE Compliant
DSCL
Figure 1: DSCL21 Block Diagram
164
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Specifications
Typical at T
=+25°C; Load R=100Ω (I
A
), ≥5MΩ(V
out
Industrial Loop Isolators and Transmitters
)
out
Ordering Information
DSCL
Module DSCL21-01 DSCL21-02
Input Range 0/4-20mA *
Input Current 50mA max at 18V max *
CMV Input to Output 500Vrms, 1 Minute *
Accuracy ±0.1% Span Typical *
Non-linearity Included in Accuracy *
Stability <50ppm/°C *
Overshoot <20µA (Typical 5µA) <10mV (Typical 2.5mV)
Compliance Voltage 18V ±5% (with Zener Diode) *
Voltage drop
(3)
Output Range 0-20mA (4-20mA) 0-10V (2-10V)
Limit Upper Range 30mA 15V
Bandwidth, -3dB 750Hz *
CMR (50Hz or 60Hz) 90dB *
NMR 20dB per Decade Above 750Hz *
Response Time 1ms, to 90% Span *
Load Resistance Range 0-600Ω >5MΩ
Output Noise <20mV (Typical <5mV) *
Environmental Weight Approximately 35g *
Housing Material Lexan 940 (UL 94 V-O) *
Shock Test 50g (10 Shocks, 3 Axis) *
Operating Temp Range -20°C to +65°C *
Storage Temp Range -40°C to +85°C *
Relative Humidity 0 to 75% Noncondensing *
Emissions EN50081-2 (Radiated, Conducted) *
Immunity EN50082-2 (ESD, RF, EFT) *
NOTES:
* Same spec as DSCL21-01
(1) Additional error <0.2% at 500Ω Load (I
(2) Calculate error due to impedance of output instrument = 500 Ω x 100/R inst.
+ <2V
(3) V
in=IORL
(4) Internal R=500Ω
±0.2% Span Max *
(at 100Ω Load)
(1)
<2V (for 500Ω Load) *
)
out
(at 10V Out)
Model Input Range Output Range
DSCL21-01 0-20mA (4-20mA) 0-20mA (4-20mA)
DSCL21-02 0-20mA (4-20mA) 0-10V (2-10V)
(2)
(4)
The DSCL21 DIN mount package accepts EN50022 (35 x 7.5) and EN50035 (G32)
type rails; Dataforth SCMXRAIL1-xx or SCMXRAIL2-xx. Multiple DSCL21 modules
may be mounted next to each other without effecting input or output signals.
Screw terminals with wire protection clamps sized for 0.2 to 4mm
2
2.5mm
stranded wires. The DSCL21 may be mounted in any position. The DSCL21
2
solid or 0.2 to
requires no maintenance.
DSCL
Figure 2: DSCL21 Dimensions
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