Product Short Description
Product Brief
Rack-mounted analog output module for closed-loop process regulation, outputs standard 4–20 mA control signals to field valve positioners, variable frequency drives, no L extended shielding variant.
Technical Specifications
- Model Series: ACN CS D2014 Analog Output Subseries
Description
- Power Supply: 24 VDC ±10, rated power consumption 13 W
- Analog Output Channels: 8 isolated 4–20 mA current output channels
- Max Output Load Resistance per Channel: 1000 Ω
- Output Signal Resolution: 16-bit DAC digital-to-analog conversion
- Backplane Bus: Metso proprietary ACN high-speed internal bus
- Operating Temperature Range: -20 °C ~ +60 °C
- Storage Temperature Range: -40 °C ~ +85 °C
- Humidity Tolerance: 5%–95% non-condensing
- Protection Grade: IP20 module body, IP54 full rack assembly
- Dimensions: 220 H × 160 W × 35 D mm
- Net Weight: 0.79 kg
Functional Features
- 8 independent isolated 4–20 mA analog output channels with high load capacity
- Per-channel short-circuit automatic cut-off protection circuit
- Front panel independent LED channel fault indicator for overload/short-circuit
- Built-in output signal ramp function to avoid sudden process equipment shock
- Onboard Flash memory stores output curve calibration parameters
- Full hot-swap compatible with ACN CS rack backplane
- Automatic channel fault recovery after short-circuit load removal
Performance Parameters
- Analog Output Control Accuracy: ±0.08% full scale
- Channel Isolation Voltage: 1500 VAC output circuit to backplane bus
- DAC Conversion Response Time: ≤ 0.8 ms per channel
- Surge Withstand Capacity: 2 kV ESD contact discharge, 4 kV EFT
- Vibration Resistance: 10–150 Hz, 1 g continuous operation
- Max Control Cable Length: 180 m shielded twisted pair cable
Material Composition
- PCB Substrate: FR4 high-Tg low-drift industrial fiberglass circuit board
- Output Terminal Blocks: Gold-plated phosphor bronze anti-oxidation terminals
- Reference Circuit: Ultra-low temperature drift precision metal film resistors
- Shield Frame: Single-layer cold-rolled steel analog output signal isolation shielding
- Mounting Housing: Black extruded aluminum alloy hard anodized anti-corrosion coating
Structural Characteristics
- Standard 1U dual-latch plug-in rack card structure
- Front panel 8-group independent LED overload fault indicator array
- Rear gold finger connector docking with rack backplane bus
- Independent wiring terminal compartment for field control signal cable access
- Double isolation barrier separates analog output circuit and digital backplane bus circuit
Working Principle
Rack main controller transmits target setpoint data via ACN backplane bus to module internal 32-bit processing chip. Digital setpoint values convert to stable 4–20 mA analog current signals through 16-bit DAC circuits, isolated analog output circuits transmit control signals to field valve positioners and VFD equipment. Per-channel hardware monitoring circuits detect load short-circuit and overload conditions, automatically cut off channel output and trigger front panel fault LED; channel resumes normal output after load fault elimination.
Advantage Highlights
- High 1000 Ω load resistance compatible with long-distance field valve positioner wiring
- Per-channel independent short-circuit protection avoids full module shutdown under single-channel fault
- Built-in signal ramp function eliminates sudden process flow/pressure impact
- Ultra-high output stability guarantees long-term closed-loop control precision
- Hot-swap maintenance without full rack power shutdown
- Factory pre-calibrated output curves without on-site adjustment required
Applicable Industries
- All Metso process automation closed-loop control scenarios: mining flotation valve regulation, pulp mill liquor flow control, petrochemical reactor temperature/pressure adjustment, water treatment dosing valve control, cement kiln air volume regulation
Installation Requirements
- Install inside standard Metso ACN CS 8/16-slot control rack
- Maintain 10 mm vertical ventilation gap between adjacent modules
- Field control signal cables adopt shielded twisted pair wiring, single-point cabinet PE grounding
- Cabinet PE grounding resistance ≤ 4 Ω to suppress output signal drift interference
- Stabilize rack backplane 24 VDC power before hot-swapping modules
- Control cabinet internal continuous operating temperature below 55 °C
Operation & Maintenance Precautions
- ESD anti-static wrist strap mandatory during module disassembly and wiring
- Do not connect channel output terminals to power supply circuits directly
- Conduct semi-annual inspection of terminal block screw tightness
- Separate analog output signal cables from high-power inverter wiring
- Spare modules stored in sealed anti-static packaging with desiccant packs
- Cut off field control valve wiring terminals before disassembling terminal blocks
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