2. Model Definition

51303982: Base part number for compact 16CH high-level AI FTA dedicated to MC-AIH65 analog input IOP module

-200: Mid-industrial reinforced PCB, upgraded moisture, dust resistance conformal coating, enhanced overvoltage withstand and noise filtering performance

Matched IOP Hardware: MC-AIH65 (16-point high-density high-level analog input UCN IOP card)

Incompatible assemblies: LLAI temperature FTA, AO output FTA, DI/transistor/relay DO FTA, pulse counter, serial communication FTA boards

3. Technical Specifications

Channel Count: 16 independent isolated high-level analog input channels

Supported Signals: 4–20 mA two-wire loop powered transmitters, 0–5 VDC, 0–10 VDC voltage transmitters

Loop Power Supply: Passive FTA; 24VDC loop excitation supplied by MC-AIH65 IOP card

PCB Protection: Medium heavy-duty full conformal coating; flammability UL94 V0

Terminal Type: Compression screw terminals, supports solid/stranded copper wire up to 14 AWG

Form Factor: Standard Size B for 35 mm DIN rail cabinet racks

Mounting Method: Snap-on clip installation onto standard 35 mm DIN rail

Operating Ambient Temperature: 0 ℃ ~ +60 ℃ (indoor control cabinet installation only)

Circuit Design: Per-channel precision low-pass EMI filters, bidirectional transient overvoltage suppression, balanced equal-impedance trace layout, loop short protection layout

Redundancy Compatibility: Fully supports dual redundant MC-AIH65 IOP card architectures, hot-swap maintenance available

Approximate Unit Weight: ~0.358 kg

4. Interface & Communication Configuration

Inner IOP Connection: Dedicated flat ribbon cable connector directly locks onto MC-AIH65 IOP pin headers. No independent communication chip; analog PV measurement values transmit over UCN control bus via paired AI IOP module.

Outer Field Terminals: Clearly silkscreen-labeled paired positive/negative signal terminals per channel, dedicated terminals for loop power distribution, channel partition design to prevent cross-talk interference.

Reference Power Source: Cabinet 24VDC system power feeds loop excitation power through MC-AIH65 IOP interface.

5. Core Functions

Cable strain relief protects delicate MC-AIH65 IOP pin headers from mechanical deformation or breakage caused by tension of field instrument cables.

Per-channel precision low-noise EMI filtering suppresses industrial switching and grid noise, stabilizing analog readings and eliminating measurement drift/jitter for closed-loop control.

Built-in overvoltage surge clamping absorbs wiring fault transients, shielding the sensitive high-resolution analog front-end of the MC-AIH65 IOP card from damage.

Medium heavy-duty conformal coating fully encapsulates PCB traces and components, resisting elevated humidity, heavy dust and mild corrosive vapors for stable 24/7 continuous operation in moderately harsh industrial cabinet environments.

Matched balanced trace impedance ensures uniform signal integrity across all 16 high-density channels, guaranteeing consistent measurement accuracy for multiple process variables.

Separated independent channel terminal layout simplifies transmitter wiring, loop resistance testing, field calibration and single-channel fault isolation without impacting other control loops.

Native redundant architecture enables hot swap of standby MC-AIH65 IOP cards without interrupting critical closed-loop process regulation and equipment monitoring.

6. Application Scenarios

Applicable industries: Petrochemical complexes, chemical manufacturing plants, thermal power stations, oil & gas refineries, pulp & paper mills, metallurgy factories, water treatment stations, pharmaceutical production lines running Honeywell Experion PKS UCN DCS.

Analog signal acquisition loops: Pressure/differential pressure transmitters, vortex/turbine flow transmitters, radar/ultrasonic level transmitters, pH/ORP analyzers, density transmitters, gas composition analyzers with 4–20mA output.

Standard compact matched terminal base for 16-point high-level analog input slots inside high-density DCS I/O control cabinets.

7. Operation & Maintenance Instructions

Matching Restriction: Only certified for pairing with MC-AIH65 16-channel high-level analog input IOP card; cannot substitute low-level temperature AI, analog output, discrete DI/DO, pulse or communication FTA assemblies.

Wiring Standards

Strictly follow signal polarity for 4–20mA and voltage transmitter pairs; reverse polarity causes no measurement reading.

Use shielded twisted-pair instrument cable for long field runs, implement single-point shield grounding only at cabinet FTA side to minimize electromagnetic interference.

Verify total loop resistance complies with MC-AIH65 and transmitter drive limits for long cable distances.

Spare Part Interchangeability: 51303982-200 shares identical analog signal circuit topology with -100 baseline and higher-grade suffix versions for urgent on-site replacement; -200 is cost-effective for medium humidity/dust industrial cabinets balancing protection and budget.

Standard Fault Troubleshooting Flow: Unstable/zero/over-range PV reading → Retighten compression terminal screws → Inspect shield grounding integrity → Measure loop current/voltage at field terminals → Confirm ribbon cable fully seated and locked → Diagnose operational health of paired MC-AIH65 IOP card.