MAN0964-14-EN_XL4_XL4P_UM
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8.4 Solid-State Digital Outputs
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 XL4/XL4 Prime
OCS 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.
Figure 8.4
–
Typical Output Wiring
The digital outputs used in the XL4/XL4 Prime OCS have electronic short circuit protection
and current limiting. While these electronic protections work in most applications, some
application may require external fusing on these outputs.
The digital outputs in the XL4/XL4 Prime OCS 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. Please see the data sheet and the chapter on
High Speed I/O 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, see the
find pages referencing Cscape settings.
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.
Q14
Q15
V+
0V
LOAD
LOAD
10 - 30VDC
Q16
LOAD
J2
J4