Signal Isolator, 4-20mA, HART Pass-through

Name: Signal Isolator, 4-20mA, HART Pass-through
Brand: Such.com
SKU: SUCH-SIGNI-1002S
Price: 110.58 USD
Availability: InStock
Rating: 5.0 (1 reviews)

1 review(s) | Add your review

SKU: SUCH-SIGNI-1002S

$110.58

● Bidirectional HART ● 2ms response ● 1.5W with HART ● Fits 2/3-wire transmitters

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Input Signal *
Output Signal *

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Overview
Spec
Application
FAQ
Reviews

Overview

This signal isolator 4‑20mA accepts 4‑20mA or 0‑20mA current inputs only, with input impedance ≤100Ω. It outputs 0‑20mA, 4‑20mA, or voltage signals (0‑5V, 1‑5V, 0‑10V, 2‑10V). Current output loads up to 550Ω, voltage loads ≥1MΩ. Available in single or dual output channels, consuming ≤1.5W or ≤2.6W. Transmission accuracy is 0.1% FS with ultra‑fast ≤2ms response and 50ppm/℃ drift. It provides loop distribution voltage ≥20V @ 20mA. As a reliable 4‑20mA isolator, it delivers stable signals. This analog isolator 4‑20mA also functions as a 4‑20mA galvanic isolator with 1500VAC isolation, DC 20‑35V supply, DIN rail mounting, and IEC 61326‑1 compliance. Ideal for DC current source conditioning in PLC/DCS systems.

Feature

HART pass-through: full bidirectional read/write for smart instruments, enabling digital diagnostics without breaking the 4-20 mA loop.
Response time: ≤2 ms (15× faster than typical 30 ms) meets high-speed PID and interlock requirements.
Loop distribution: ≥20 V at 20 mA powers two/three-wire transmitters directly, eliminating external power supplies.
Power consumption: with HART active, single ≤1.5 W / dual ≤2.6 W, below 2 W/channel average, reducing cabinet heat.
solation strength: 1500 VAC (I/O/power, 1 min no arcing) prevents ground loops and protects against surges.
Mounting & accuracy: 35 mm DIN rail with 0.1% FS accuracy (at 20°C) ensures plug-and-play installation and high reliability.

Dimension (Unit: mm)

Dimensional drawing of a 13mm ultra-slim 4-20mA signal isolator with plug-in terminals, side width 13mm, front height 110mm, overall depth 117.5mm

Wiring Diagram

Spec

Input Signal	4-20 mA
Input Signal	0-20 mA
Output Signal	0-20 mA
	4-20 mA
	0-5 V
	1-5 V
	0-10 V
	2-10 V
Number of Input & Output Channels	1 input channel & 1 output channel
	1 input channel & 2 output channels
	2 input channels & 2 output channels
Full Load Power Consumption	Single output: ≤ 1.5 W
Full Load Power Consumption	Dual output: ≤ 2.6 W
Output Load	For current output: ≤ 550 Ω
Output Load	For voltage output: ≥ 1 MΩ
HART Transparent Transmission	Supported
Output Channel Configuration	Single output or Dual output (determines power consumption)
Transmission Accuracy	0.1% FS (at 20°C)
Response Time	≤2 ms
Temperature Drift	≤50 ppm / °C
Insulation Strength	1500 VAC (1 min, no flashover)
Input Impedance (Current)	≤100 Ω
Power Supply Voltage (Loop)	≥20 V @ 20 mA (loop distribution voltage)
Power Supply Voltage Range	DC 20-35 V
EMC Compliance	GB/T18268 (IEC 61326-1)
Weight	Approx. 130 g
Mounting	35 mm DIN rail
Certifications	CE Compliant

Application

Robotic Welding

4-20mA signal isolator application in solar-powered smart agricultural irrigation

Solar-Powered Irrigation

4-20mA signal isolator application in laboratory incubators for temperature

Lab Incubator

FAQ

Q1: What does HART pass‑through mode mean, and is special configuration required? ❯

A: It means the isolator transparently passes HART digital signals between the field device and your host system (handheld configurator or DCS) while still providing analog 4‑20mA isolation. No special configuration is needed – just wire it in‑line and HART communications will work automatically.

Q2: How fast is the response, and will it cause noticeable delay in the control loop? ❯

A: Response time is ≤2ms – one of the fastest in its class. That's fast enough for most PID control loops; the delay is barely measurable compared to standard isolators that typically run 20‑50ms (even slower if they process HART digitally). For sub‑millisecond applications, please consult our engineering team.

Q3: Why is the power consumption higher than non‑HART models? ❯

A: HART pass‑through requires additional circuitry to maintain signal integrity on both the analog and digital paths. Single‑output ≤1.5W, dual‑output ≤2.6W – still perfectly acceptable for most DIN rail installations. Just keep it in mind if you're packing many units into a tightly sealed cabinet.

1 review(s)

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From: Nicholas Freeman | Date: 7/29/2026 9:25 AM

signal isolator 4 20ma does the job

Picked this up for a basic automation upgrade and it worked without much hassle. The signal isolator 4 20ma handles the current signal conversion properly and has been stable during normal use. Nothing overly complicated, which is actually a plus for maintenance work. Good option when you need a straightforward isolating module.

Signal Isolator, 4-20mA, HART Pass-through

Feature

Dimension (Unit: mm)

Wiring Diagram

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