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Product short description:
  • 16 discrete I/O
  • Active high in / sourcing out
  • Ethernet I/O plus Expansion I/O
  • Multi-protocol support

NT2120 modules offer 16 bidirectional discrete I/O channels for high-side (sourcing switch) applications. NTE Ethernet models provide a compact network interface to monitor or control discrete device levels. Appending NTX expansion models can interface up to 64 discrete I/O channels on a single IP address.

Click here to watch a short video highlighting the features of the BusWorks NT Series.

NT2120 Ethernet Discrete I/O Modules Description

The BusWorks® NT2000 series offers a cost-effective, modular solution for Ethernet remote I/O systems. Two module types are available. NTE Ethernet models provide the protocol interface plus I/O signal processing channels. NTX expansion modules add extra I/O channels when mated to any NTE Ethernet communication module.

NT2120 modules offer 16 bidirectional discrete I/O channels for high-side (sourcing switch) applications. NTE Ethernet models provide a compact network interface to monitor or control discrete device levels. Appending NTX expansion models can interface up to 64 discrete I/O channels on a single IP address.

Applications include monitoring and control of relays, solenoids, contact closures, TTL logic, and discrete sensors on motors, lamps, valves, doors, etc.

An isolated RS-485 bus links up to three expansion modules to the Ethernet module with connectors that join along the DIN rail. This internal NT bus distributes power and communication between the modules. Users can mix analog, temperature, and discrete I/O modules across the NT bus.

Acromag’s i2o® messaging technology allows direct peer-to-peer or multicast communication between remote modules without a master controller.
Learn more about i2o and multicast features >

Performance Specifications

Ethernet Interface (NTE models only)

Communication:
Configurable for Modbus TCP/IP, Ethernet/IP, or Profinet. Ethernet/IP, Profinet support coming soon.
10/100Mbps data rate, auto-sensing.

IP Address: Default 192.168.0.10. Configurable static IP or DHCP.

Discrete Inputs

Input Signal Voltage Range: 0 to +32V DC.

Input Current: 280µA, typical at 32V DC.

Input Signal Threshold:
TTL compatible w/100mV of hysteresis, typical. Low-to-High threshold: 1.7VDC, typical.
High-to-Low threshold: 1.6VDC, typical.
TTL logic limit – LOW: 0.8V DC max.
TTL logic limit – HIGH: 2.0VDC min.

Input Resistance: 100K ohms typical (input only), 10K ohms w/ tandem output using internal pull-downs installed.

Input Hysteresis: 100mV DC typical.

Input Response Time: 5ms typical, not including network time.

Input Transient Voltage Suppressor: Installed at every I/O point, up to 38V working, 47V breakdown, and 77V clamping.

Discrete Outputs

Output “ON” Voltage Range: 2 to 32V DC.

Active Current Limitation: Output limits load current to a shorted load at 0.6A typical, 0.4A-0.9A range.

Output “ON” Current Range: 0 to 250mA DC, continuous.

Output Rds ON Resistance: 0.8 ohms typical, 1.6 ohms maximum.

Protections
Thermal overload shutdown.
Over-voltage shutdown.
Over-load shutdown.
Reverse polarity protection shunt.

Output “OFF” Leakage Current
50µA maximum per channel (mosfet only). Does not include input bias current.

Output Response Time: 5ms typical. Does not include network time.

General I/O

Input Update/Conversion Rate: Fresh data available to the network every 10ms.

Response Time from an Ethernet Command: Less than 5ms, typical.

Excitation: Excitation voltage of 6-32V required between field EXC and RTN terminals. Excitation must source 52mA minimum (at 32V). For 16 channels at maximum rated load, excitation must source 4A.

I/O Pull-Ups (Internal): Each I/O channel has 10KΩ pull-down to I/O return and will never float.

Environmental and Physical

Temperature and Humidity
Operating: -40 to +70°C (-40 to +158°F).
Storage: -40 to +85°C (-40 to +185°F).
Relative Humidity: 5 to 95%, non-condensing.

Isolation: 1500V AC for 60 seconds and 250V AC or 354V DC continuous between I/O channels (group), each network port and power circuits.

Power Supply
9-32V DC SELV power wired to NTE model only.
Power to NTX models is via NT bus connection.

Power Consumption
NTE2121: <=1.5W (input).
NTX2121: <=0.5W max. (each).

Dimensions (width x height x depth)
NTE: 25 x 116.9 x 139.2 mm (0.98 x 4.6 x 5.48 inches).
NTX: 25 x 116.9 x 116.65 mm (0.98 x 4.6 x 4.59 inches).

Weight
NTE: 0.5 lbs (0.23 kg).
NTX: 0.3 lbs (0.14 kg).

Standards and Certifications

Electromagnetic Compatibility (EMC): CE marked, per EMC Directive 2004/108/EC.

Safety Approvals: UL/cUL: Class I; Div 2; Groups A, B, C, D (pending). ATEX/IECEx: Zone 2 (pending).

Learn more about the Expandable NT Series >

Control Engineering 2022 Engineers Choice Awards Finalist: BusWorks NT Series

  • Configured over Ethernet with web browser
  • Expandable I/O capacity, up to 64 I/O channels of mixed signal types on one IP address
  • Field-selectable Modbus TCP/IP, *Ethernet/IP, or * Profinet communication
  • i2o peer-to-peer or multicast communication
  • Dual RJ45 ports enable daisy chain topology
  • Inputs support TTL thresholds and up to 32V
  • Open-drain outputs switch up to 32V and 250mA
  • Tandem input/output channels allow loop-back monitoring of outputs
  • LED status indicators for visual troubleshooting
  • *OPC-UA, *MQTT and *RESTful API IIoT support
  • *Conditional logic for rule-based I/O operation
  • Advanced *alarm and *data logging functions
  • 1500V isolation between I/O, network, and power
  • Thin 25mm housing with pluggable terminals
  • Wide temperature operation (-40 to 70°C)
  • CE compliant. UL/cUL Class 1 Div 2 and ATEX/IECEx Zone 2 approvals (pending).

* Coming soon. Consult factory for availability.

How to Connect to Acromag Ethernet I/O Devices - 8500815
Getting Connected to Acromag Ethernet I/O Devices These instructions summarize the basic steps you will have to take in order to initially connect an Acromag Ethernet I/O product to your Personal Computer (PC) or laptop. To connect an Ethernet device to your PC, consult with your network administrator. Either temporarily change the TCP/IP configuration of...
How to Extend I/O Capability with Ethernet - AD353114
Procidia Control Solutions: Extending I/O Capability with Ethernet Introduction Ethernet has gained wide acceptance in the industrial process control world as a viable local area network (LAN) solution. Today, Ethernet is also finding use on the sensor and data acquisition side of the controller. Manufactures have developed I/O devices that put thermocouple, RTD, current, voltage,...
What is EtherNet/IP? White Paper - 8500747 (Log in to view the file)
Introduction to EtherNet/IP What is EtherNet/IP (Ethernet Industrial Protocol)? EtherNet/IP is traditional Ethernet combined with an industrial application layer protocol targeted to industrial automation. This application layer protocol is the Control and Information Protocol (CIP™). In this whitepaper, you will review the basic aspects of EtherNet/IP and learn how the open-source protocol can benefit your...
How to Remotely Access Ethernet I/O Over the Internet - 8400517 (Log in to view the file)
This white paper details the steps needed to access your I/O module remotely over the internet. This can be done with Ethernet-enabled I/O modules that have the capability to display built-in webpage-based output monitoring. In other words, if your I/O module can serve a webpage over Ethernet, and the network it is connected to has...
How to Connect to an Ethernet Device for Communication - 8501122-8501116 (Log in to view the file)
How to Connect to an Ethernet Device for Communication Acromag manufactures Ethernet-enabled devices that monitor and isolate voltage, current, thermocouple, and RTD signals, as well as control analog and digital outputs, and can transmit I/O information over Ethernet and on the internet. However, the complexities of Ethernet communication can make connecting to these devices difficult....

Manuals

NT2000 User Manual (Log in to download the file)

Drawings & Diagrams

  • Compare

    4001-252: DIN Rail End Stops

    • DIN rail end stop for hazloc approvals
    Select options
  • Compare

    5035 Series: Ethernet Cables

    • Ethernet straight cable, CAT5
    • Ethernet crossover cable, CAT5E
    • Low EMI Double-Shielded Ethernet Patch Cable
    Select options

Additional information

Weight 8 oz
Dimensions 1 × 5 × 6 in
Product Series

BusWorks NT Series

Part Number

NTE2121-1111: Ethernet I/O module with dual RJ45 ports, 16 discrete I/O channels, NTX2121-0011: Expansion I/O module with 16 discrete I/O channels

  • Description

    NT2120 Ethernet Discrete I/O Modules Description

    The BusWorks® NT2000 series offers a cost-effective, modular solution for Ethernet remote I/O systems. Two module types are available. NTE Ethernet models provide the protocol interface plus I/O signal processing channels. NTX expansion modules add extra I/O channels when mated to any NTE Ethernet communication module.

    NT2120 modules offer 16 bidirectional discrete I/O channels for high-side (sourcing switch) applications. NTE Ethernet models provide a compact network interface to monitor or control discrete device levels. Appending NTX expansion models can interface up to 64 discrete I/O channels on a single IP address.

    Applications include monitoring and control of relays, solenoids, contact closures, TTL logic, and discrete sensors on motors, lamps, valves, doors, etc.

    An isolated RS-485 bus links up to three expansion modules to the Ethernet module with connectors that join along the DIN rail. This internal NT bus distributes power and communication between the modules. Users can mix analog, temperature, and discrete I/O modules across the NT bus.

    Acromag’s i2o® messaging technology allows direct peer-to-peer or multicast communication between remote modules without a master controller.
    Learn more about i2o and multicast features >

    Performance Specifications

    Ethernet Interface (NTE models only)

    Communication:
    Configurable for Modbus TCP/IP, Ethernet/IP, or Profinet. Ethernet/IP, Profinet support coming soon.
    10/100Mbps data rate, auto-sensing.

    IP Address: Default 192.168.0.10. Configurable static IP or DHCP.

    Discrete Inputs

    Input Signal Voltage Range: 0 to +32V DC.

    Input Current: 280µA, typical at 32V DC.

    Input Signal Threshold:
    TTL compatible w/100mV of hysteresis, typical. Low-to-High threshold: 1.7VDC, typical.
    High-to-Low threshold: 1.6VDC, typical.
    TTL logic limit – LOW: 0.8V DC max.
    TTL logic limit – HIGH: 2.0VDC min.

    Input Resistance: 100K ohms typical (input only), 10K ohms w/ tandem output using internal pull-downs installed.

    Input Hysteresis: 100mV DC typical.

    Input Response Time: 5ms typical, not including network time.

    Input Transient Voltage Suppressor: Installed at every I/O point, up to 38V working, 47V breakdown, and 77V clamping.

    Discrete Outputs

    Output “ON” Voltage Range: 2 to 32V DC.

    Active Current Limitation: Output limits load current to a shorted load at 0.6A typical, 0.4A-0.9A range.

    Output “ON” Current Range: 0 to 250mA DC, continuous.

    Output Rds ON Resistance: 0.8 ohms typical, 1.6 ohms maximum.

    Protections
    Thermal overload shutdown.
    Over-voltage shutdown.
    Over-load shutdown.
    Reverse polarity protection shunt.

    Output “OFF” Leakage Current
    50µA maximum per channel (mosfet only). Does not include input bias current.

    Output Response Time: 5ms typical. Does not include network time.

    General I/O

    Input Update/Conversion Rate: Fresh data available to the network every 10ms.

    Response Time from an Ethernet Command: Less than 5ms, typical.

    Excitation: Excitation voltage of 6-32V required between field EXC and RTN terminals. Excitation must source 52mA minimum (at 32V). For 16 channels at maximum rated load, excitation must source 4A.

    I/O Pull-Ups (Internal): Each I/O channel has 10KΩ pull-down to I/O return and will never float.

    Environmental and Physical

    Temperature and Humidity
    Operating: -40 to +70°C (-40 to +158°F).
    Storage: -40 to +85°C (-40 to +185°F).
    Relative Humidity: 5 to 95%, non-condensing.

    Isolation: 1500V AC for 60 seconds and 250V AC or 354V DC continuous between I/O channels (group), each network port and power circuits.

    Power Supply
    9-32V DC SELV power wired to NTE model only.
    Power to NTX models is via NT bus connection.

    Power Consumption
    NTE2121: <=1.5W (input).
    NTX2121: <=0.5W max. (each).

    Dimensions (width x height x depth)
    NTE: 25 x 116.9 x 139.2 mm (0.98 x 4.6 x 5.48 inches).
    NTX: 25 x 116.9 x 116.65 mm (0.98 x 4.6 x 4.59 inches).

    Weight
    NTE: 0.5 lbs (0.23 kg).
    NTX: 0.3 lbs (0.14 kg).

    Standards and Certifications

    Electromagnetic Compatibility (EMC): CE marked, per EMC Directive 2004/108/EC.

    Safety Approvals: UL/cUL: Class I; Div 2; Groups A, B, C, D (pending). ATEX/IECEx: Zone 2 (pending).

    Learn more about the Expandable NT Series >

    Control Engineering 2022 Engineers Choice Awards Finalist: BusWorks NT Series

  • Features & Benefits

    • Configured over Ethernet with web browser
    • Expandable I/O capacity, up to 64 I/O channels of mixed signal types on one IP address
    • Field-selectable Modbus TCP/IP, *Ethernet/IP, or * Profinet communication
    • i2o peer-to-peer or multicast communication
    • Dual RJ45 ports enable daisy chain topology
    • Inputs support TTL thresholds and up to 32V
    • Open-drain outputs switch up to 32V and 250mA
    • Tandem input/output channels allow loop-back monitoring of outputs
    • LED status indicators for visual troubleshooting
    • *OPC-UA, *MQTT and *RESTful API IIoT support
    • *Conditional logic for rule-based I/O operation
    • Advanced *alarm and *data logging functions
    • 1500V isolation between I/O, network, and power
    • Thin 25mm housing with pluggable terminals
    • Wide temperature operation (-40 to 70°C)
    • CE compliant. UL/cUL Class 1 Div 2 and ATEX/IECEx Zone 2 approvals (pending).

    * Coming soon. Consult factory for availability.

  • Tech Papers

    How to Connect to Acromag Ethernet I/O Devices - 8500815
    Getting Connected to Acromag Ethernet I/O Devices These instructions summarize the basic steps you will have to take in order to initially connect an Acromag Ethernet I/O product to your Personal Computer (PC) or laptop. To connect an Ethernet device to your PC, consult with your network administrator. Either temporarily change the TCP/IP configuration of...
    How to Extend I/O Capability with Ethernet - AD353114
    Procidia Control Solutions: Extending I/O Capability with Ethernet Introduction Ethernet has gained wide acceptance in the industrial process control world as a viable local area network (LAN) solution. Today, Ethernet is also finding use on the sensor and data acquisition side of the controller. Manufactures have developed I/O devices that put thermocouple, RTD, current, voltage,...
    What is EtherNet/IP? White Paper - 8500747 (Log in to view the file)
    Introduction to EtherNet/IP What is EtherNet/IP (Ethernet Industrial Protocol)? EtherNet/IP is traditional Ethernet combined with an industrial application layer protocol targeted to industrial automation. This application layer protocol is the Control and Information Protocol (CIP™). In this whitepaper, you will review the basic aspects of EtherNet/IP and learn how the open-source protocol can benefit your...
    How to Remotely Access Ethernet I/O Over the Internet - 8400517 (Log in to view the file)
    This white paper details the steps needed to access your I/O module remotely over the internet. This can be done with Ethernet-enabled I/O modules that have the capability to display built-in webpage-based output monitoring. In other words, if your I/O module can serve a webpage over Ethernet, and the network it is connected to has...
    How to Connect to an Ethernet Device for Communication - 8501122-8501116 (Log in to view the file)
    How to Connect to an Ethernet Device for Communication Acromag manufactures Ethernet-enabled devices that monitor and isolate voltage, current, thermocouple, and RTD signals, as well as control analog and digital outputs, and can transmit I/O information over Ethernet and on the internet. However, the complexities of Ethernet communication can make connecting to these devices difficult....
  • Specs & Data Sheets

    Manuals

    NT2000 User Manual (Log in to download the file)

    Drawings & Diagrams

  • Accessories

    • Compare

      4001-252: DIN Rail End Stops

      • DIN rail end stop for hazloc approvals
      Select options
    • Compare

      5035 Series: Ethernet Cables

      • Ethernet straight cable, CAT5
      • Ethernet crossover cable, CAT5E
      • Low EMI Double-Shielded Ethernet Patch Cable
      Select options
  • Additional information

    Additional information

    Weight 8 oz
    Dimensions 1 × 5 × 6 in
    Product Series

    BusWorks NT Series

    Part Number

    NTE2121-1111: Ethernet I/O module with dual RJ45 ports, 16 discrete I/O channels, NTX2121-0011: Expansion I/O module with 16 discrete I/O channels