Tel: 
Email: 
WhatsApp: Description
Product Introduction
In a noisy industrial plant, a ground loop can turn a precise 4-20 mA signal into a guessing game. The FOXBORO SRI986-BIDS7ZZZNA is a single-channel isolator designed to sit between your field instruments and the I/A Series control rack, breaking those electrical loops dead in their tracks.This specific module is configured for current input to current output (BIDS), making it a workhorse for standard process control loops. It doesn’t just pass the signal; it actively isolates the field wiring from the sensitive card cage electronics, which is the only way to guarantee signal integrity in high-interference environments. If you’re looking to stop erratic readings caused by stray voltage, this is the hardware solution.
Key Technical Specifications
- Model: SRI986-BIDS7ZZZNA
- Series: I/A Series S5
- Function Type: Signal Isolator / Barrier
- Channel Count: 1-Channel
- Input Signal: 4-20 mA
- Output Signal: 4-20 mA
- Supply Voltage: 24 VDC
- Isolation Voltage: 2300 V AC (1 minute)
- Accuracy: ±0.1% of span
- Operating Temp: 0°C to 60°C
Application Scenarios & Pain Points
The “Ghost Voltage” Scenario
Imagine a midnight call because a pump keeps starting and stopping by itself. The maintenance team arrives to find no one near the equipment. After checking, they discover a 4-20 mA temperature loop feeding phantom voltage back into the PLC because the sensor cable runs parallel to a high-voltage motor cable for 100 feet. This is where the SRI986 earns its keep. By installing this isolator, you physically sever the electrical path, stopping the interference from ever reaching the logic solver.Typical Use Cases:
- In Petrochemical Plants: When you have miles of cable running through high-voltage zones, using this isolator prevents false trips in Safety Instrumented Systems (SIS).
- In Water/Wastewater Facilities: Do you have sensors located in remote lift stations powered by different transformers? This module eliminates ground potential differences that corrupt data.
- In Legacy System Upgrades: If you are integrating old 4-20 mA field devices into a modern I/A Series rack, this acts as the compatibility layer, ensuring the signal doesn’t load down the source.
