Monitor More I/O Points with Fewer IP Addresses
- Analog, Digital I/O, and Multi-function Modules
- Modbus/TCP & EtherNet/IP
& Profinet - Field Selectable Networking Protocol
- IIoT or Peer-to-Peer Communication
- IF/Then/Else Control Logic
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Expandable Remote I/O
Acromag’s Busworks® NT Series lets you add expansion I/O modules for a high-density, cost-efficient remote I/O solution
Base unit NTE Ethernet models handle the network communication and interface up to 16 analog or digital I/O channels for remote monitoring or control applications. NTX Expansion models provide a cost-effective way to add a mix of I/O signal types under a single IP address.
Multi-protocol support
The NTE Ethernet I/O modules are pre-programmed to support Modbus/TCP, Ethernet/IP and Profinet protocols. Just select which is to be used. Modules also support direct i2o® peer-to-peer communication without a master.
- Integrated I/O expansion bus
- Up to 64 I/O channels per port
- Mix analog, digital, and temperature I/O on one port
- i2o peer-to-peer or multicast communications
- Rugged design, -40 to 70°C
- Hazardous location approvals

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Common Specifications
Network Communication
Interface: 10/100Mbps Ethernet.
Protocols: Modbus TCP/IP, Ethernet/IP, or Profinet and i2o® peer-to-peer / multi-cast.
IIoT communication: OPC-UA, MQTT, RESTful APIs.
Connectors: Two shielded 8-pin RJ-45 sockets, 10BaseT/100BaseTX.
Approvals and Certifications
CE marked.
UL/cUL Class I; Div. 2; Groups A, B, C, D (pending).
ATEX/IECEx Zone 2 (pending).
Modbus/TCP, EtherNet/IP, Profinet conformance.
Radiated Emissions: BS EN 61000-6-4, CISPR 16.
RFI: BS EN 61000-6-2, IEC 61000-4-3.
Conducted RFI: BS EN 61000-6-2, IEC 61000-4-6.
ESD: BS EN 61000-6-2, IEC 61000-4-2.
EFT: BS EN 61000-6-2, IEC 61000-4-4.
Surge Immunity: BS EN 61000-6-2, IEC 61000-4-5.
Environmental
Temperature ranges:
Operation: -40 to 70°C (-40 to 158°F).
Storage: -40 to 85°C (-40 to 185°F).
Relative humidity: 5 to 95% non-condensing.
Vibration: 4g, per IEC 60068-2-64.
Shock: 25g, per IEC 60068-2-27.
Isolation: 1500V AC for 60 seconds or 250V AC continuous between I/O, network, and power.
Power requirement: 10 to 32V DC SELV, 2.0W max (83mA maximum @ 24V).
Physical
Housing: General purpose plastic enclosure for mounting on 35mm “T-type” DIN rail.
Case Material: Self-extinguishing polyamide, UL94 V-0 rated, general purpose NEMA Type 1.
Circuit Board: Military grade fire-retardant epoxy glass (IPC-4101/98).
I/O Connectors: Removable terminal blocks rated for 12A/250V; AWG #26-12, stranded/solid copper wire.
Dimensions (W x H x D): 25.0 x 116.9 mm (0.98 x 4.6 inches).
NTE: 139.2 mm (5.48 inches).
NTX: 116.65 mm (4.59 inches).
Weight:
NTE models: 0.5 lbs (0.23 Kg).
NTX models: 0.3 lbs (0.14 Kg).
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Conditional Logic Computing
Ethernet expandable I/O modules can now process IF/THEN/ELSE logic for rule-based I/O operation.
Acromag’s new BusWorks® NT series remote I/O modules are now enhanced with conditional logic. The conditional logic increases the functionality with a system of rules that allows extremely complicated decisions based on relatively simple “yes/no” questions. For example, reading an analog or digital input value can trigger an action to happen as a result. This value could be used to control a relay when one or more conditions occur. Another example would be when a discrete input is ON and a temperature threshold is crossed. More complex math computation and logic are also an option.
Conditional logic is configured on the NT’s built-in web configuration page. No programming is required. The modules support up to 64 conditions using IF/THEN/ELSE statements.
Learn More About the Busworks NT’s Conditional Logic
Learn More: Ethernet expandable I/O modules can now process IF/THEN/ELSE logic for rule-based I/O operation
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Ethernet-based Configuration
Easy setup from anywhere with a web browser
NTE Ethernet I/O modules have a built-in web server for convenient configuration without installing any software. Several web pages lead you through the options to set your IP addresses, protocol, and I/O parameters. A diagnostics page lets you monitor I/O values from your PC, tablet, or smartphone.
Advanced features for IIoT and local control logic functions
The configuration pages will help you quickly setup advanced capabilities such as peer-to-peer communication, conditional logic computation, and alarm output.
- Peer-to-peer communication
- Counter/timers
- IF/THEN/ELSE logic
- Alarm output*
- RESTful APIs*
- OPC-UA server*
- MQTT support*
- Field-upgradeable
(*coming soon)
Learn More: New Ethernet Offers Peer-to-Peer and Multicast Messaging
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Busworks NT Series Models:
Ethernet I/O Units
- NTE2111-1111: Dual RJ45 ports, discrete I/O, sinking output, 16-ch
- NTE2121-1111: Dual RJ45 ports, discrete I/O, sourcing output, 16-ch
- NTE2131-1111: Dual RJ45 ports, discrete I/O, relay output, 6 MR + 6 DI
- NTE2211-1111: Dual RJ45 ports, analog input, differential current, 8 AI + 2 DIO
- NTE2221-1111: Dual RJ45 ports, analog input, single-ended current, 16-ch
- NTE2231-1111: Dual RJ45 ports, analog input, differential voltage, 8 AI + 2 DIO
- NTE2241-1111: Dual RJ45 ports, analog input, single-ended voltage, 16-ch
- NTE2311-1111: Dual RJ45 ports, analog output, process current, 8-ch
- NTE2321-1111: Dual RJ45 ports, analog output, process voltage, 8-ch
- NTE2511-1111: Dual RJ45 ports, combo I/O, current, 4 AI + 2 AO + 4 DIO
- NTE2512-1111: Dual RJ45 ports, combo I/O, current, 4 AI + 4 DIO
- NTE2531-1111: Dual RJ45 ports, combo I/O, voltage, 4 AI + 2 AO + 4 DIO
- NTE2532-1111: Dual RJ45 ports, combo I/O, voltage, 4 AI + 4 DIO
- NTE2611-1111: Dual RJ45 ports, temperature input, 8 thermocouple + 2 DIO
- NTE2621-1111: Dual RJ45 ports, temperature input, 4 RTD/resistance + 2 DIO
Expansion I/O Units
- NTX2111-0011: Discrete I/O, sinking output, 16-ch
- NTX2121-0011: Discrete I/O, sourcing output, 16-ch
- NTX2131-0011: Discrete I/O, relay output, 6 MR + 6 DI
- NTX2211-0011: Analog input, differential current, 8 AI + 2 DIO
- NTX2221-0011: Analog input, single-ended current, 16-ch
- NTX2231-0011: Analog input, differential voltage, 8 AI + 2 DIO
- NTX2241-0011: Analog input, single-ended voltage, 16-ch
- NTX2311-0011: Analog output, process current, 8-ch
- NTX2321-0011: Analog output, process voltage, 8-ch
- NTX2511-0011: Combo I/O, current, 4 AI + 2 AO + 4 DIO
- NTX2512-0011: Combo I/O, current, 4 AI + 4 DIO
- NTX2531-0011: Combo I/O, voltage, 4 AI + 2 AO + 4 DIO
- NTX2532-0011: Combo I/O, voltage, 4 AI + 4 DIO
- NTX2611-0011: Temperature input, 8 thermocouple + 2 DIO
- NTX2621-1111: Temperature input, 4 RTD/resistance + 2 DIO
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Because We Know I/O

Doing business with Acromag means you can count on receiving dependable value when using our products. We guarantee to meet or exceed published product performance specifications and offer you exceptional personal service with a real person within one business day.
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Read Acromag’s Ethernet Remote I/O Modules Add Ethernet/FIP Communication product release.

