2. Product Function Description

1. Channel Independent Galvanic Isolation

   Each AO loop built-in isolated signal isolation circuit, completely separates internal DCS control circuit and field actuator loop, eliminates ground potential difference drift, suppresses frequency converter EMI, lightning surge and long cable interference, guarantees stable PID regulation precision.

2. Standard 4–20mA Signal Reconstruction

   Receives digital-analog converted 4–20mA current signal from AO IOP card, filters and isolates the signal without linear attenuation, outputs standard current signal to drive pneumatic/electric regulating valves. Max load capacity meets long-distance field wiring requirements.

3. Crimp Spring Quick Terminal (-325 core feature)

   Adopts spring crimp compression terminal structure, no screwdriver required for wiring, fast installation and maintenance; anti-loose design suitable for general industrial vibration environments, compatible with 14~22AWG instrument cables.

4. Overvoltage & Overcurrent Protection

   Each channel equipped with independent self-recovery short-circuit protection and TVS surge suppression; when field line short circuit or surge occurs, automatically limit output current to avoid back-damage to AO main control IOP card.

5. Hardware Self-Diagnosis Matching

   Cooperates with MU-PAOX02 IOP to detect loop open circuit, short circuit, signal over-range faults; fault status uploaded to UCN network and displayed on operator station alarm window.

6. Non-Redundant Standard Design

   -325 version is non-redundant FTA, applicable to most general control loops; if redundant AO system is required, select corresponding redundant FTA series.

3. Core Electrical Technical Specifications

1. Channel Configuration: 8 independent galvanically isolated analog output channels

2. Standard Signal: Input & Output 4–20mA DC analog control current

3. Isolation Strength: 1500VAC channel-to-channel galvanic isolation

4. Output Max Load Resistance: 500Ω, compatible with all mainstream valve positioners

5. Signal Precision: Linearity error ≤ ±0.05% FS

6. Terminal Type: Spring crimp compression quick terminal

7. PCB Feature: Non-conformal coated circuit board, for clean indoor general control cabinets

8. Operating Ambient Temperature: -40℃ ~ +70℃ industrial wide temperature range

9. Protection Mechanism: Channel independent short-circuit self-recovery, ESD, TVS transient voltage suppression

10. Certification: CE industrial safety certification, UL listed

11. Power Supply: Powered by HPM/APM rack 24VDC backplane

12. Power Consumption: Max 1.1W full load

4. Industrial Application Scenarios

1. Chemical & Petrochemical Industry

   Reactor, distillation tower regulating valve control loop isolation; spring crimp terminals speed up instrument wiring during unit overhaul, suitable for indoor clean control rooms.

2. Thermal Power Industry

   Boiler feedwater valves, steam turbine steam regulating actuator signal isolation, filter high-frequency interference from fan and pump frequency converters.

3. Oil & Gas Industry

   Pipeline pressure regulating valves, storage tank liquid level control actuator signal conditioning, stable long-distance transmission of control signals.

4. General Process Control

   Water treatment, pharmaceutical factory indoor control cabinet AO loop wiring isolation, fast wiring maintenance via crimp spring terminals.

5. Version Selection Guidance

• Choose 51304638-325 (MU-GAOX72) : Indoor clean cabinet, demand fast crimp spring wiring, no high humidity/corrosive gas.

• Choose 51304638-375 (MC-GAOX72) : Same crimp terminal, full PCB anti-corrosion coating, for high-humidity, salt fog, trace corrosive gas harsh cabinets.

• Choose 175 series: Screw anti-vibration terminals, partial coating, medium harsh environment cabinet.

• Choose 125 series: Ordinary screw terminal, low-cost general indoor cabinet.