ENVIROMUX-DI16DO16 Digital I/O Expander

The ENVIROMUX-DI16DO16 from NTI – Your Scalable Bridge to Intelligent Automation

In complex monitoring environments where every second counts and numerous devices must interact seamlessly, flexibility is the key to success.

The ENVIROMUX-DI16DO16 Digital I/O Expander from NTI transforms your existing ENVIROMUX-2D, -5D, or -16D systems into powerful automation centers by adding 16 dry contact digital inputs and 16 open-collector outputs.

This expansion allows integration of a wide range of sensors, switches, and actuators—from door contacts and smoke detectors to relays for fans or lighting. The inputs support voltages up to 36 VDC and include surge protection, while outputs can switch up to 500 mA per channel and feature integrated pull-up resistors for clean, stable signals. Imagine a large data center complex: one ENVIROMUX‑16D monitors key parameters, while the DI16DO16 connects 16 dry door contacts. When an emergency exit is opened, the input registers the change, SNMP triggers an alarm, and outputs activate evacuation lights—all simultaneously. A chain of events that saves lives and minimizes downtime, without the need for extra controllers.

The ENVIROMUX-DI16DO16 stands out for its connectivity and scalability. It connects via an RJ45 port using CAT5/5e/6 cable up to 152.4 meters long, allowing remote placement across large facilities.

Each ENVIROMUX-16D supports up to 16 expanders, the ENVIROMUX‑5D up to five, and the ENVIROMUX‑2D two—ensuring your infrastructure can grow along with your needs. Power is supplied directly by the host unit, eliminating the need for a separate power supply and simplifying installation and maintenance.

Screw terminals support 16–26 AWG wiring for secure, vibration-resistant connections, while a dedicated tachometer input measures frequencies up to 255 Hz—for example, tracking fan speed. A practical use case: in a manufacturing plant with multiple production lines, limit switches on conveyor belts are connected through the expander. If the belt speed drops below a threshold, the tachometer detects it and automatically triggers an open-collector output to stop downstream machines—preventing bottlenecks and maximizing efficiency, saving hundreds of euros in uptime every day.

SNMP integration makes the ENVIROMUX-DI16DO16 the automation hub of modern networked systems. With read/write community strings, outputs can be controlled remotely while inputs provide constant real-time status, accessible via MIB browsers.

Combine it with the ENVIROMUX-FSC Fiber Extenders, and your reach extends up to 2 kilometers via fiber—perfect for campus-wide applications. Operating temperatures from 0 to 70°C and storage down to –20°C guarantee dependable performance in demanding environments. RoHS compliance underscores NTI’s commitment to sustainability.

Consider a logistics warehouse: the 16 inputs monitor door and gate sensors, while outputs control electromagnetic locks upon unauthorized access. SNMP immediately notifies the security center—preventing theft and protecting assets worth millions. Such intelligent automation reduces manual intervention by up to 80% and raises overall system uptime to nearly 100%.

Key Technical Features of the ENVIROMUX-DI16DO16 – Powerful and Versatile

• Expanded I/O capacity: 16 dry contact inputs (0–36 VDC, surge-protected) including tachometer (0–255 Hz); 16 open-collector outputs (up to 500 mA, 0–24 VDC, 22 kΩ pull-ups).
• Easy connectivity: RJ45 sensor port with CAT5/5e/6 cable up to 152.4 m; scalable (up to 16 per E‑16D, five per E‑5D, and two per E‑2D).
• Rugged terminals: Screw connectors for 16–26 AWG wires—secure and vibration-resistant.
• Low power consumption: Powered directly from ENVIROMUX host—no external PSU required.
• SNMP control: Fully integrated with writable outputs and read-only inputs; OIDs accessible via MIB browser.
• Extended reach: Up to 2 km using ENVIROMUX-FSC fiber converter/extender.
• Environmental reliability: Operating range 0–70°C, storage –20–70°C; optional DIN rail mount (E‑DI16DO16‑D).
• Build quality: RoHS and CE compliant; MTBF 650,166 hours; dimensions 165 x 79 x 27 mm.

Applications: Where the ENVIROMUX-DI16DO16 Excels

The expander proves invaluable across industries. Here are real-world examples of its versatility:

• Data centers: Controls rack doors and cooling. Example: input detects open door, output activates beacon light, SNMP notifies NOC—unauthorized access stopped.
• Industrial automation: Monitors machinery states. Example: tachometer input detects fan failure; output triggers backup fan—continuous operations ensured.
• Building security: Integrates alarm systems. Example: 16 motion detector inputs trigger locking mechanisms and cameras—break-ins prevented.
• Logistics hubs: Automates conveyor systems. Example: jam sensor triggers stop signal—blockages cleared, throughput optimized.
• Telecom facilities: Remotely switches relays. Example: SNMP command activates antenna power—maintenance performed remotely, downtime halved.
• Laboratories: Automates HVAC systems. Example: humidity input triggers venting— protects equipment and maintains compliance.

Why Choose NTI’s ENVIROMUX-DI16DO16? The Key Advantages

The NTI expander enhances the ENVIROMUX ecosystem by evolving simple monitoring into active automation. The ROI is substantial—automated control reduces labor costs, prevents damage, and enhances operational continuity.

• Scalability: Up to 256 I/Os per ENVIROMUX‑16D—expand effortlessly as your network grows.
• Network integration: SNMP-based centralized control, compatible with NMS platforms such as Nagios.
• Reliable and durable: High MTBF and robust construction minimize downtime and maximize lifespan.
• Field example: A data center saved €50,000 per year through automated cooling control with the DI16DO16.

Available Models:

• E-DI16DO16
  Digital input/output expander (open-collector outputs)
• E-DI16DO16-D
  Digital input/output expander (open-collector outputs), DIN rail mount
• E-DI16DOR16-v2
  Digital input/output expander with normally open relay outputs, desktop version
• E-DI16DOR16-v2-d
  Digital input/output expander with normally open relay outputs, desktop and DIN mount version
• E-DI16DOR16-v22r
  Digital input/output expander with normally open relay outputs, 1U rackmount (dual configuration)
• E-DI16DOR16-v2r
  Digital input/output expander with normally open relay outputs, 1U rackmount

Compatibility

• Adds 16 digital inputs and 16 digital open-collector outputs to any ENVIROMUX‑xD base unit
• No external power supply required – powered directly from host ENVIROMUX device
• Compatible with ENVIROMUX‑2D, ENVIROMUX‑5D, and ENVIROMUX‑16D; not compatible with E‑MICRO‑TRH(P), E‑MINI‑LXO, or E‑1W(P)