General I/O Configuration
Digital / PWM Output Configuration
Solid-State Digital Outputs
X4 - Model A: Solid-state digital outputs are generally used to activate lamps, low voltage solenoids, relays, and
other low voltage and low current devices.
NOTE: The digital outputs used on the X4 are “sourcing” outputs. This means the output applies a positive voltage
to the output pin when turned ON. When turned off, the output applies approximately zero volts with respect to the
I/O ground.
The digital outputs used in the X4 have electronic short circuit protection and current limiting. While these electronic
protections work in most applications, some applications may require external fusing on these outputs.
The digital outputs in the X4 are typically controlled via %Q bits in the register mapping. Some of the outputs are
designed for high-speed applications and can be used for PWM or frequency output applications. Refer to the X4
datasheet and the High-Speed I/O chapter for additional information.
When the controller is stopped, the operation of each output is configurable. The outputs can hold the state they
were in before the controller stopped or they can go to a predetermined state. By default, digital outputs turn off. For
more information on Stop State, refer to "Cscape Configuration" on page1.
The digital outputs feature an output fault bit. %I32 will turn on if any of the outputs experience a short circuit, over-
current or the output driver overheats.
Model A & Model R Digital Output Wiring
Page 66 of 163
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