Best 4-20 mA Splitter Solutions for Industrial Signals and Isolation
4-20 mA splitters are essential in process control and automation, allowing a single current signal to drive multiple devices while maintaining signal integrity and electrical isolation. This guide reviews five reliable models, highlighting their isolation capabilities, input/output configurations, power requirements, and installation ease. Whether you’re expanding a control loop, driving data loggers, or wiring PLC inputs, these options help maintain accuracy and protect sensitive equipment in noisy industrial environments.
| Product | Brand | Key Benefit | Link |
|---|---|---|---|
| 4-20mA Signal Splitter | 1 Input, 2 Isolated Outputs | Automation Systems Interconnect | Dual isolated outputs with high accuracy | https://www.amazon.com/dp/B00PH0AUJO?tag=spcrewenergy-20 |
| ASI ASI451141 4-20mA Splitter | Automation Systems Interconnect | Quad outputs with 3-way isolation | https://www.amazon.com/dp/B078XZ93JN?tag=spcrewenergy-20 |
| ANGGREK Splitter, 4-20Ma, 24V | ANGGREK | One in, two out with robust isolation | https://www.amazon.com/dp/B0C3J7CDXT?tag=spcrewenergy-20 |
| Lelukee Analog Signal Isolator Transmitter Splitter | Lelukee | DIN rail mount with 1 in / 2 out or 2 in / 4 out | https://www.amazon.com/dp/B0CBGP8KM3?tag=spcrewenergy-20 |
| Analog Signal Isolator Transmitter Splitter (4-20ma 2 in 4 Out) | Lelukee | 2 in / 4 out configuration for distributed sensing | https://www.amazon.com/dp/B0CBGPB2XL?tag=spcrewenergy-20 |
4-20mA Signal Splitter | 1 Input, 2 Isolated Outputs
- Brand: Automation Systems Interconnect
- Configuration: 1 input, 2 isolated outputs
- Power: 24V DC
- Features: Analog signal isolator, zero/span adjustment, 3-way isolation
The device provides dual isolated outputs from a single analog 4-20 mA input, enabling independent downstream instrumentation while minimizing crosstalk and interference. Calibration controls help maintain measurement accuracy across temperature and load variations.
ASI ASI451141 4-20mA Analog Signal Splitter
- Brand: Automation Systems Interconnect
- Input: 1; Outputs: 4
- Isolation: 3-way
- Mounting: DIN rail
With four outputs, this splitter distributes a single 4-20 mA signal to multiple devices while maintaining signal integrity through robust isolation. Its DIN rail mounting faciliates quick integration in control panels.
ANGGREK Splitter, 4-20Ma, 24V
- Brand: ANGGREK
- Channels: 1 input, 2 outputs
- Power: 24V DC
- Features: High precision components, intelligent safety grids
This model emphasizes compact design with reliable isolation between input and outputs, suitable for PLC and process control interfaces where space is at a premium.
Lelukee Analog Signal Isolator Transmitter Splitter
- Brand: Lelukee
- Configuration: 1 input, 2 outputs
- Mounting: DIN rail
- Signal Type: 4-20 mA
DIN-rail mounted isolator and splitter family from Lelukee supports straightforward integration into existing control cabinets, offering reliable galvanic separation for safer signal distribution.
Analog Signal Isolator Transmitter Splitter (2 In / 4 Out)
- Brand: Lelukee
- Configuration: 2 inputs, 4 outputs
- DIN Rail mounting
- 4-20 mA compatibility
The dual-input, quad-output arrangement supports larger distributed sensing networks, enabling centralized measurement with distributed actuation while maintaining electrical isolation.
Analog Signal Isolator Transmitter, Single Channel 2 Out
- Brand: Lelukee
- Configuration: 1 input, 2 outputs
- 3-in-1 design: isolator, distributor, intelligent transmitter
- Voltage: DC 24V; wide input range
This option blends signal isolation with multiple outputs, suitable for expanding monitoring points without sacrificing signal fidelity in noisy industrial environments.
Buying Guide: Key Considerations for 4-20 mA Splitters
When selecting a 4-20 mA splitter, several factors determine long-term reliability and suitability for a given application. Consider the following perspectives to choose wisely:
- Isolation and safety: Evaluate the level of galvanic isolation (input-output, loop-to-loop) to protect controllers and sensors from noise, transients, and ground loops. Three-way isolation is common in quality units.
- Output configuration: Determine how many outputs you need (2, 4, or more) and whether the device supports one-in/multiple-out or multiple-in/multiple-out arrangements. Some models offer up to four isolated outputs from a single input.
- Power requirements: Check voltage requirements (often 24 V DC) and any power dissipation considerations, especially in cabinet spaces with heat constraints.
- Calibration and accuracy: Look for zero/span adjustment and high-precision components to maintain linearity across the 4-20 mA range and temperature variations.
- DIN rail mounting: For panel housing, DIN rail compatibility enables quick installation within standard electrical enclosures.
- Environmental robustness: Flame-retardant materials, shielding, and protection against high-frequency interference help ensure reliability in industrial environments.
- Maintenance and diagnostics: Some devices offer status indicators or easy recalibration paths, which reduce downtime during calibration cycles.
- Brand and support: Choose established brands with clear documentation and accessible technical support to assist with installation and troubleshooting.
Installation should ensure proper power supply distribution, clear separation between input and outputs, and secure wiring to prevent signal degradation. For complex loops, pairing a 4-20 mA splitter with a dedicated isolation module can improve noise immunity and measurement accuracy across a distributed system.