ABB TZIDC Digital Positioner
ABB TZIDC Digital Positioner
The TZIDC is an electronically configurable positioner with communication capabilities designed for mounting to pneumatic linear or rotary actuators.
PRODUCT DESCRIPTION
ABB TZIDC Digital Positioner
■ The TZIDC is an electronically configurable positioner with communication capabilities designed for mounting to pneumatic linear or rotary actuators.
■ It features a small and compact design, a modular construction, and an excellent cost-performance ratio.
■ Fully automatic determination of the control parameters and adaptation to the final control element yield considerable time savings and an optimal control behavior.
Features
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"Fail-freeze" function
If the electrical power supply should fail, the positioner output 1 (and 2, if applicable) is closed and the pneumatic actuator stops ("freezes") the valve in the current position. If compressed air supply should fail, the positioner depressurizes the actuator. -
"Fail-safe" function
If the electrical power supply fails, the positioner output 1 is depressurized, and the pneumatic actuator’s return spring moves the valve to the defined safe position. In case of a double-acting actuator the second output 2 is additionally pressurized.
