Model Interpretation

51204126 = Card base material code; -915 = Hardware version number; Belongs to UCN I/O AO series. Technical Specifications

8-channel analog output, divided into 2 groups for isolation (4 channels/group); output signals: 0-20mA, 4-20mA; single-channel isolation withstand voltage 1500VAC; power supply from the backplane: 5VDC/24VDC; operating temperature: -25℃ to +70℃, humidity: 5% to 95% without condensation; net weight of the entire machine: approximately 480g; accuracy: ±0.2% FS; UL, CE industrial explosion-proof Class I Div2 certification.

Interface and communication configuration

Gold finger connectors on the rear side are plugged into the UCN rack backplane; the front end is equipped with a dedicated FTA terminal block to connect the field cables; UCN field bus and controller data interaction; three-color status indicator lights for RUN, FAULT, and channel failure on the panel. Core function

The controller converts digital instructions into industrial standard analog outputs; it has group electrical isolation, and a single-loop failure does not affect the other channels; it has hardware circuit breakers / short-circuit self-checks, and reports upper computer faults; it supports hot-swappable online replacement of the rack; it has automatic current-limiting protection for output overload. Applicable scenarios

Replacement of control loop spare parts and system expansion renovation for the old TDC300 valves in petrochemical, refining and power plants.

Operation and maintenance instructions

Select shielded twisted-pair cables for on-site wiring, single-point grounding for cabinets, and separate wiring for power cables and signal cables; Tighten FTA terminal screws quarterly, verify output current accuracy; Regularly clean and dehumidify in humid chemical environments, and perform full-channel calibration before installing spare parts on the machine.