You are using an outdated browser. For a faster, safer browsing experience, upgrade for free today.

DT1

24 Ch , Discrete I/O (0 to 60 VDC, 500 mA/Ch.)

The DT1 module features 24 programmable channels for either input (voltage or contact sensing with programmable, on-module pull-up/pull down current sources), or output (current source, sink, or push-pull) up to 500 mA per channel from an applied, external 3 – 60 VCC source. These modules can sense broken input connections and whether an input is shorted to +VCC or to ground.

Features
  • 24 channels available as inputs or outputs
  • Programmable for Input (voltage or contact sensing) or Output (current source, sink or push-pull) per channel/bank
  • Ability to current share*, by connecting multiple outputs in parallel, to sink/source up to 2 A per bank
  • Ability to handle high inrush current loads (for example, two #327 incandescent lamps in parallel)
  • Supports ‘dual turn-on’ (series channel output) applications (for example, dual series ‘key’ missile launch control)
  • Programmable debounce circuitry with selectable time delay eliminates false signals resulting from relay contact bounce
  • Built-In-Test runs in background constantly monitoring system health for each channel
  • Ability to sense broken input connection and if input is shorted to +V or to ground
  • Ability to read I/O voltage and output current for improved diagnostics (indicates if load is connected)

Specifications
  • Input Range: 0 to 60 VDC. Programmable for either voltage or switch closure sensing.
  • Overvoltage Surge Protection: 80 VDC max. (< 50 ms); 100 VDC max. (< 1 μs)
  • Voltage/Contact Sensing: Software selectable per bank. When the input channel is utilized for direct voltage sense, Vcc is not required. When input is used to detect switch closures, Vcc is required to provide a current source (pull-up). Vcc per channel bank must be between 5 VDC min. and 60 VDC max. A module has 4 Vcc banks, each with 6 channels for a total of 24 channels/module.
  • Input Pulse Detection: A pulse of > 20 μs minimum width will be sensed and reported by the appropriate High–Low or Low-High transition status/interrupt
  • Input Impedance: 1 MΩ (with or without power applied to module).
  • Switching Threshold: Four levels (Upper, Lower, Max High, Max Low ) are programmable from 0 to 60 VDC with 10-bit resolution
  • Voltage Measurement: User can read input voltage of each channel. LSB=100 mV; Accuracy: ±3 LSB’s (300 mV) over temp. To: 1% FSR
  • HIGH/LOW Differential (Hysteresis): 300 mV min. recommended. Programmable by using Upper & Lower thresholds.
  • Debounce: Programmable per channel from 0x00000000 (deactivated) to 0xFFFFFFFF (2^32 * 10µs) (LSB= 10 μs; 32-bit resolution). (pending characterization)
  • Update Rate: Each channel is updated every 10 µs.
  • Output Formats: Low-Side (I sink), High-Side (I source) or Push-Pull (I source-sink); programmable per channel.
  • Output Voltage Range: 0 to 60 VDC. (Output voltage is defined by the user provided Vcc applied to channel bank) Low-side drive does not require Vcc. High-side and push-pull drive requires Vcc.
  • Overvoltage Surge Protection: 80 VDC max. (< 50 ms); 100 VDC max. (< 1 μs)
  • Output Current: 0.5 A maximum (28 V Vcc typical) per channel. 2 A total per Vcc bank (total Module capacity 8 A). Measurement accuracy: ±10% ± 25 mA.
  • Output Impedance: < 1 Ω (0.5 Ω typical)
  • Current Share Applications: 0.5 A maximum (28 V Vcc typical) per channel. 2 A total per Vcc bank (total Module capacity 8 A). Each channel can be programmed to generate frequency, pulse or arbitrary pulse width with 10 microsecond minimum resolution. Short circuit protected
  • Overcurrent Protection: Low current (average): > 625 mA average over 3 ms. High current (pulse): > 6 amps for less than or equal to 30 µs.
  • Power: 600 mA @ 5 V (typical, non-inclusive of any external Vcc related current)
  • Weight: 1.5 oz. (42 g)
Block Diagram

(Click diagram to enlarge)

Documentation
5/13/2021 4:04:30 PM
Accelerate Your Time-to-Mission™ With COSA®

NAI’s Configurable Open Systems Architecture™ (COSA®) offers a choice of over 70 smart I/O, communication, and Ethernet switch functions, providing the highest packaging density and greatest flexibility of any multifunction I/O board in the industry. Preexisting, fully-tested functions can be combined quickly and easily in an unlimited number of ways. Each I/O function has dedicated processing, unburdening the system Single Board Computer (SBC) from unnecessary data management overhead.

Related COSA® Products
Can’t find what you’re looking for?

North Atlantic's resource center is where you will find information on warranty and repairs, details of our Product Lifecycle Management and Configuration Management programs – and much more.

Visit Resource Center