ATC770 Microprocessor-Based Pressure/Process Controller 83
Control Output Limiter - This function reduces the risk of over-reving the extruder during start up by
limiting the full output of the controller to a certain percentage (i.e. an output limit of 75% on a 4 -
20 mA output will limit the full output to 16 mA.
Low/High Limit for SP - These values restrict or set boundaries to where the set point can be
adjusted. This prevents operators from inadvertently altering the set point to high or to low.
Direct Action (Control Output) - The mA output decreases as pressure decreases, and increases as
pressure increases.
Reverse Action (Control Output) - The mA output increases as pressure decreases, and decreases as
pressure increases.
Direct/Reverse Action Examples:
Direct Action: LED on - Relay Energized
LED off - Relay De-Energized
Reverse Action/Failsafe: LED on - Relay De-Energized
LED off - Relay Energized
NOTE: Reverse Action works only on the relay’s status.
13. REPAIR
Questions concerning warranty, repair cost, delivery, and requests for a RA# should be directed to
the Dynisco Repair Department, 508-541-9400 or email: repair@dynisco.com. Please call for a
return authorization number (RA#) before returning any product. Damaged products should be
returned to:
DYNISCO INSTRUMENTS
Attn: RA # _______________
38 Forge Parkway
Franklin, MA 02038
For technical assistance please call 800-221-2201 or 508-541-9400 or fax 508-541-9436.
14. WARRANTY
This Dynisco product is warranted under terms and conditions set forth in the Dynisco Web Pages.
Go to www.dynisco.com and click on “Warranty” at the bottom of any page for complete details.
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