DNR-DIO-432 United Electronic Industries Guardian 32-Channel Industrial Digital Output Layer Board

The United Electronic Industries DNx-DIO-432 Series Guardian 32-Channel Industrial Digital Output Layer Boards features with the DNA-DIO-432 which is compatible with UEI's "Cube" series chassis, while the DNR-DIO-432 is designed for use in the RACKtangle I/O chassis. Electronically, they are identical. The boards are designed for use in a wide variety of applications. Each channel is configured as a current sink and switches voltages between 3.3 and 36 VDC. Each channel is rated for continuous operation at 600 mA with an output voltage drop of less than 550 mV. (The DNA-DIO-433 provides identical capability with current "sourcing" outputs.)

The DIO-432 is part of UEI's Guardian series. It not only controls the digital outputs, it provides a unique output monitoring capability. An on-board 24-bit A/D converter monitors each channel's output voltage and current. This allows the application to detect and flag short and open circuits as well as other "suspicious" behavior. The monitoring capability is also powerful diagnostic tool allowing a repair technician to quickly and accurately identify blown, or mis-wired channels. Channels not used as outputs may serve as analog inputs. With the output "On", each channel will input current (0-600mA). Turn the output off, and it measures 0-36 VDC analog input signals with ±10 mV accuracy.

The Guardian advantage features with programmable overcurrent protection. The user may select the current and duration of overload (as short as 10 mS) required before the channel is shut down. Each board provides 350 Vrms isolation between the I/O and the cube and other installed I/O layers. The DNA-DIO-432 offers update rates up to 1 kHz and simplifies software writes by transferring all data in a single, 32-bit word.

Each channel offers a pulse-width-modulated (PWM) "soft-start/stop" capability. This allows power to be applied/removed gradually, greatly increasing the reliability of devices like incandescent bulbs where thermal shock reduces life expectancy. The PWM may also used as an analog output control for low speed, high voltage/current applications.