Can I reverse the 4–20 mA control output and change to a 20–4 mA signal?

Yes, the output signal can be reversed. In the setup parameter OUT menu, set the OU.A parameter to "20–4."

Advanced Application UT75A

Temperature Controller with increased monitoring and operating capabilities
Mid-level UT55A/UT52A

Increase monitoring and operating capabilities
UP35A/UP32A

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UP55A

Program controller with 30 patterns, simultaneous monitoring, and ladder sequence function
UT32A-D

Digital Indicating Controller with selectable 2-loop control and intuitive design
UT35A/UT32A

Increase monitoring and operating capabilities