4-20mA Sensor Converter ENVIROMUX-S420MA-24V

NTI ENVIROMUX-S420MA-24V – Your 4-20 mA Sensor Converter for up to Two Channels

In modern industrial plants, data centers, or building management systems, countless sensors provide their readings as 4-20 mA current signals – robust, interference-resistant, and standardized.

But how do you integrate them into your ENVIROMUX monitoring system? The ENVIROMUX-S420MA-24V from NTI is the smart solution: an external RJ45 device that monitors up to two analog 4-20 mA sensors (ISA types 2, 3, and 4), supplying each with 24 VDC / 25 mA and transmitting the signals seamlessly to the ENVIROMUX-2D/5D/16D system.

Whether pressure, level, flow, humidity, or CO₂ – this converter turns analog industrial standards into digital alarms, trends, and logs. Imagine this: in a Stuttgart production facility, a 4-20 mA pressure sensor monitors system pressure. At 22 mA (threshold), the ENVIROMUX-5D sends an SMS – the technician lowers the pressure before a valve fails. Reaction time: two minutes. Without the S420MA-24V, the sensor would be isolated, monitoring manual, and risk high. With it, everything is centralized, automated, and safe.

The technical refinement lies in its thoughtful integration: the converter connects to the ENVIROMUX system via CAT5/5e/6 cable up to 152 meters – ensuring stable signal transmission even across large facilities. The 8‑pole screw terminal block provides secure, vibration-resistant sensor connections – no soldering, no crimping required.

Each channel provides exactly 24 VDC / 25 mA – sufficient for most industrial transmitters. Power is supplied directly by the ENVIROMUX base unit – no external power supply or extra cabling needed. With the optional ENVIROMUX-FSC Fiber Converter, the range can be extended up to 2 km – ideal for multi-building or campus installations.

A real-world example: a logistics center in Hamburg monitors the filling levels of two diesel tanks with 4-20 mA sensors. The S420MA-24V is mounted in the control cabinet, connected via CAT6 cable to the ENVIROMUX-16D. When Tank 1 drops to 18 mA (empty), the system automatically triggers a refill order – delivery arrives before operations halt. The converter not only saves costs but also prevents downtime.

Installation is effortless: using the included mounting hardware, the converter can be fixed to a wall, control cabinet, or DIN rail. The compact design (105 × 58 × 30 mm) fits anywhere. RoHS compliance ensures eco‑friendly production.

Another example: in a Berlin data center with precision climate control, a 4-20 mA humidity sensor measures the supply air. At 8 mA (too dry), the ENVIROMUX-2D activates humidification – server hardware remains protected from electrostatic discharge. The ENVIROMUX-S420MA-24V is the universal translator between analog process technology and digital ENVIROMUX intelligence – flexible, reliable, and scalable.

• Monitors up to two analog 4-20 mA sensors (ISA types 2/3/4)
• Provides 24 VDC / 25 mA per sensor – active power supply
• 8‑pole screw terminal – secure and maintenance‑friendly
• CAT5/5e/6 up to 152 m to ENVIROMUX – flexible cabling
• Expandable up to 2 km via ENVIROMUX-FSC – for large sites
• Powered by ENVIROMUX‑2D/5D/16D – plug‑and‑play setup
• Compact: 105 × 58 × 30 mm, mounting hardware included
• RoHS‑compliant – eco‑friendly and future‑proof

Application Areas with Real‑World Benefits

The ENVIROMUX‑S420MA‑24V integrates analog process values seamlessly into ENVIROMUX:

• Industry & manufacturing: hydraulic pressure. Munich press plant: 22 mA → shutdown → tool saved.
• Logistics & storage: diesel level. Hamburg depot: 18 mA → auto‑refill → operations continue.
• Building management: CO₂ in ventilation. Cologne office: 12 mA → fresh air increased → optimal indoor climate.
• Data center: filter differential pressure. Frankfurt: 8 mA → filter change alarm → airflow maintained.
• Food processing: pH value in production. Düsseldorf dairy: 15 mA → process correction → batch compliant.
• Water treatment: flow in piping. Stuttgart plant: 20 mA → pump adjustment → energy saved.

The NTI ENVIROMUX‑S420MA‑24V is your gateway to digital process monitoring – bringing 4‑20 mA sensors into the ENVIROMUX network, powering them reliably, and enabling secure signal transmission.

Compatibility and Summary:

• External RJ45 device for monitoring up to two analog 4‑20 mA sensors
• 4‑20 mA sensor converter – supplies 24 VDC / 25 mA per sensor
• No power adapter required – powered directly by the ENVIROMUX base unit
• Compatible with ENVIROMUX‑2D, ENVIROMUX‑5D, and ENVIROMUX‑16D
• Not compatible with E‑MICRO‑TRH(P), E‑MINI‑LXO, and E‑1W(P)