Distributed Combination I/O

The rugged NovaTech Distributed Combination I/O Module (DCIO) can help reduce wiring and costs in substation monitoring and control applications. Its hardened design, small form factor, and distributed communications capability allow it to be installed virtually anywhere in the substation. DCIO modules can be wired back to any RTU or PLC supporting the DNP3 protocol using an RS-232, RS-485, fiber optic or Ethernet connection. The DCIO is available with eight inputs, eight outputs, and eight transducer inputs. The DCIO also offers high resolution (1ms) time-stamping, an IRIG-B port, and independent input circuits in an enclosed package. Customized input and output labels can be inserted into the front panel. The DCIO, along with the Distributed Discrete I/O module (DDIO), provides security features to meet NERC CIP requirements, including strong passwords, user groups, encrypted protocols and firewall.

Environmental and Immunity Operating Temperature Range: -20° to + 70°C; Tested to IEEE C37.90.1, 2 and 3 surge

Communication Protocol Configuration DNP3 to module for status and control. Unsolicited Report-by-Exception (URBE) supported; Set Time on module supported; Serial baud rate set up to 57.6kb, Ethernet 10/100M Baud rate. Simple Mode: Set address and comm parameters with DIP switches. Advanced Mode: Set advanced comm parameters through webpages served from module

Discrete Inputs/Outputs

  • 8-in / 8-out @ 12, 24, 48 or 125V dc (+/- 20%).
  • Other configurations available by special order.
  • Input circuit draw: 2mA
  • Output relays: Heavy duty protective relay-grade 10A for direct connection to circuit breaker trip coils
  • Removable Phoenix Type Screw Terminals, 12 – 24AWG

Mechanical 10 Million no load operations
Make 30A @ 180V dc per IEEE C37.90
Breaking Capacity (10,000 operations) .3A at 125V dc per IEC 60255-0-20:1974
Cyclic Capacity (2.5 cycles/second) .3A at 125V dc per IEC 60255-0-20:1974
Analog Inputs individually selectable per point with slide switch

  • +/- 2mA for “-1mA to +1mA” and “0 to 1mA” applications
  • +/- 20mA for “4 to 20mA” applications
  • +/- 10V for “0 to 10V”, “0 to 5V” applications

Analog Specifications

  • Input Impedence: 0- 10V: 10KΩ; 0- 1mA: 500Ω; 4- 20mA: 50Ω
  • Overload Range: 0- 10V: -12.5V to +12.5V; 0- 1mA: -2.5mA to +2.5mA; 4- 20mA: 0mA to 25mA
  • Overall Accuracy: + / – .2% V; + / – .2% A
  • Isolation: Channel to channel: 300V dc; Input to chassis: 3000V dc
  • Temperature Coefficient: + / – 100ppm per degree C
  • Rejection: Minimum common mode rejection of 115dB; Minimum differential mode rejection (60Hz) of +60dB

Physical Ports

Built-In RS-232 (DB9F) Built-In Ethernet Port (RJ45 Style 10/100BaseT) RS-485 Type B (Screw Terminals Two-Wire or Four-Wire) or Fiber Optic Type C (ST Connector) RS-232 Type A (DB9F) or RS-485 Type G (Screw Terminals Two-Wire) or Fiber Optic Type J (V-Pin Connector) IRIG-B or 1PPS (Screw Terminal)
Data Communications to DNP3 Master X X X
Time Synchronization X (using NTP) X X
Online Diagnostics X X
Configuration X

Dimensions and Mounting

Click to Enlarge

Click to Enlarge

Click to Enlarge

Click to Enlarge

Discrete Circuit Diagram


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  • NovaTech Orion I/O  

    NovaTech Orion I/O™ is an extension of the family of OrionLX™ Automation Platforms for substation automation and incorporates the same security features, software tools and “NCD” configuration as the OrionLX. It is a rack-mountable I/O assembly with four slots—A, B, C, and D—that can be filled with any combination of I/O cards: currently 16-Point Discrete Input Card,

    August 16, 2017

  • Distributed Combination I/O Datasheet  

    The rugged Distributed Combination I/O module (DCIO) provides eight isolated analog inputs – 300V dc channel-to-channel – as well as eight isolated discrete inputs and outputs.

    February 4, 2011

  • The NovaTech Distributed Discrete I/O (DDIO) and Digital Combination I/O (DCIO) Sequence of Events Recording (SER) Modules are rugged signal conditioners. The modules are designed to present the state of field “inputs” to an attached Master device, as well as to accept output commands from a Master device and convert these commands to “outputs” to control field devices. The Orion DDIO/DCIO Modules communicate with the Master device using DNP3 protocol. The Orion DDIO Module is available in 24 inputs (-111), 16 inputs / 8 outputs (-110), and 8 inputs / 16 outputs (-100) models. The Orion DCIO Module only has one combination of inputs and outputs available: 8 inputs/8 outputs/8 analog inputs (-102)

    July 31, 2015

  • Additional Datasheets, Application Notes, Customer Success Stories and other documents in our documentation library

    December 13, 2017 – December 14, 2017 Jeddah Hilton Hotel - Saudi Arabia

    Saudi Arabia Smart Grid Conference – Booth 56 – 58

    NovaTech will be represented at the Saudi Arabia Smart Grid Conference on Smart Grid and Renewable Energy (SASG 2017). The purpose of the event is to bring together researchers, designers, developers and practitioners interested in the advances and applications...

    January 23, 2018 – January 25, 2018 San Antonio, Texas

    DistribuTECH 2018 – Booth #2135

    NovaTech will exhibit at the 2018 DistribuTECH in San Antonio, Texas from January 23 - 25. Please come visit us in Booth #2135 to see our latest product offerings.

  • NovaTech Utility Systems and Services

    Almost half of NovaTech’s business is in Systems and Services including web page design, panel design, math and logic development, Orion configuration, and onsite installation and commissioning. Mark Matassa explains how our engineers can work with you to reduce project execution time at the 2016 DistribuTECH Conference and Exhibition in Orlando, Florida.

    March 18, 2016

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