Impulse DSCL20 User Manual

DSCL20

Loop Powered Isolator - Component Module

Description

Each DSCL20 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 DSCL20 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, and 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, Easy to Install Plug-In

Accessories

 Small OEM Modular Package Ideal for

PCB Mounting

 I/O Packaging for Vertical or Horizontal

Mounting

 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: DSCL20 Block Diagram

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For information call 800-444-7644

Industrial Loop Isolators and Transmitters

DSCL

Specifications

Module

Input Range 0/4-20mA

Input Current 50mA max at 18V max

CMV Input to Output 500Vrms, 1 Minute

(1)

Accuracy

Non-linearity Included in Accuracy

Stability <50ppm/°C

Overshoot <20µA (Typical 5µA)

Compliance Voltage 18V ±5% max (with Zener Diode)

Voltage drop

Output Range 0/4-20mA

Limit Upper Range 30mA

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

Output Noise <20mV Peak-to-Peak (Typical <5mV)

Environmental Weight Approximately 1.5g

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:

(1) Additional error <0.2% at 500Ω load

(2) V

in=IORL

(at 100Ω Load) ±0.05% Span Typical

(2)

+ <2V

Typical at TA=+25°C

DSCL20

±0.1% Span Max

<2V (for 500Ω Load)

Ordering Information

Model Input Range Output Range

DSCL20-01 0-20mA (4-20mA) 0-20mA (4-20mA)

DSCL20-02 0-20mA (4-20mA) 0-20mA (4-20mA)

Accessory

Model Description

DSCX-01 Socket for DSCL20-02

Figure 1: DSCL20-01 (Bent Pins)

Figure 2: DSCL20-02 (Straight Pins)

Figure 3: DSCX-01 Socket and Hold-down Accessory for DSCL20-02
(Straight Pin Modules)

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DSCL

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