608 / 5.000 Digital Input Expander for ENVIROMUX-1W(P)

The ENVIROMUX-DI2-1W from NTI – Compact Expansion for Smart 1-Wire Monitoring

In small to medium-sized server environments where space and budget are limited but reliable monitoring is still essential, the ENVIROMUX-DI2-1W sets a new standard.

This digital input expander from NTI allows you to seamlessly integrate two dry contact sensors into the 1-Wire daisy-chain configuration of the ENVIROMUX‑1W(P) system with minimal effort. Each expander counts as two individual sensor readings in the system, allowing up to 12 units to be connected to a single E‑1W.

In other words: up to 24 additional monitoring points over a single cable. The connection uses an RJ11 port for the 1‑Wire chain and a 3‑pin terminal block for the sensors, ensuring stable, interference‑free integration. Imagine a compact server room in a mid‑size company: instead of costly individual sensors for each rack door or smoke detector, you can use the DI2‑1W to connect existing dry contacts. When a door opens, the contact status is registered, the system sends an SMS alert, and the administrator responds immediately — unauthorized access is prevented without adding extra cabling clutter.

The flexibility of the ENVIROMUX‑DI2‑1W makes it the perfect companion for decentralized monitoring solutions. The maximum 1‑Wire cable length is 183 meters, and the distance from the dry contact sensors to the expander itself is not included in this limit — sensors can be placed up to 1,000 feet (approx. 305 meters) away from the DI2‑1W.

This allows entirely new setups in large facilities such as multi‑level warehouses or distributed control cabinets. Power is supplied completely through the E‑1W system, eliminating the need for an external power supply, which simplifies installation and maintenance. With compact dimensions of only 50 × 37 × 50 mm, the expander fits easily into tight enclosures or DIN rail mounts.

A real‑world example: in a multi‑floor data center, temperature and humidity sensors are deployed in different rooms. Through daisy‑chaining, the DI2‑1W interconnects several units, while dry contacts on the cooling systems detect performance drops. When cooling efficiency decreases, the contact triggers an alarm that activates fans or alerts maintenance — preventing downtime and lowering operating costs through optimized energy use.

The ENVIROMUX‑DI2‑1W is more than a simple hardware add‑on — it’s the key to a scalable, cost‑efficient monitoring strategy. By integrating existing dry contacts such as switches, relays, or detectors, it expands the E‑1W system without compatibility issues. The 1‑Wire technology ensures reliable, noise‑resistant data transmission, and its ability to daisy‑chain up to 12 expanders scales monitoring capacity to 24 inputs.

The system supports real‑time notifications via email, SMS, or SNMP, keeping you informed at all times. Consider a small hosting center scenario: multiple customer racks need individual monitoring. Each DI2‑1W connects two door sensors per rack; if one is opened, a warning light flashes and the customer receives a push notification. This ensures SLA compliance, reduces manual checks, and increases customer satisfaction — an investment that quickly pays off by reducing penalties and improving uptime.

Technical Highlights of the ENVIROMUX-DI2-1W – Simple, Flexible, Reliable

• Dual dry contact integration: 3‑pin terminal block for two potential‑free sensors; counted as two unique readings on the E‑1W.
• 1‑Wire daisy‑chain connection: RJ11 port; supports up to 12 expanders per E‑1W (maximum of 24 inputs).
• Extended range: 183 m total cable length; sensors up to 1,000 ft away from expander (distance not included in chain length).
• Energy efficient: Fully powered by the E‑1W system; no external PSU required.
• Compact and rugged: Dimensions 50 × 37 × 50 mm; fits in tight spaces, vibration‑resistant.

Applications: Practical Use Cases for the ENVIROMUX‑DI2‑1W

The expander is ideal for compact yet demanding environments. Here are specific use cases with measurable benefits:

• Server rooms: Monitors rack doors and UPS status. Example: door opening triggers an alarm – technician on site in 3 minutes, theft prevented.
• Control cabinets: Connects limit switches. Example: overheat switch activates fan through daisy‑chain – hardware damage reduced by 90%.
• Warehouses: Links smoke and motion detectors. Example: smoke detected – evacuation triggered, inventory worth €30,000 saved.
• Office IT: Monitors printer or network device status. Example: paper jam detected – maintenance scheduled, productivity improved.
• Telecom stations: Remote battery monitoring. Example: voltage drop detected – backup power activated, network downtime avoided.
• Small data centers: Scales up to 24 points. Example: full chain monitors all racks – 99.9% SLA maintained.

Why Choose NTI ENVIROMUX‑DI2‑1W? Unbeatable Advantages

NTI uses the DI2‑1W to make small systems perform big. Cost‑effective, scalable, and easy to install – perfect for SMBs.

• Scalable: From 2 to 24 inputs – grow without reinvestment.
• Cost‑efficient: Reuses existing sensors, reduces cabling.
• Dependable: 1‑Wire technology and solid connectors ensure minimal downtime.
• Example: A hosting provider saved €5,000 annually through automated door monitoring using eight DI2‑1W units.

Compatible with:

• Expansion module for digital inputs of the ENVIROMUX‑1W(P)
• Compatible with ENVIROMUX‑1W(P)
• Not compatible with E‑MICRO‑TRH(P), ENVIROMUX‑MINI‑LXO, ENVIROMUX‑2D, ENVIROMUX‑5D, and ENVIROMUX‑16D