II. Model Interpretation

51204164: 8-channel analog input FTA basic material code

-125: PCB hardware version

Matching IO card: MC-TAIH22 (8-point 4–20mA analog input module)

III. Technical Parameters

Number of channels: 8 independent analog input channels

Standard signal: 4–20mA two-wire transmitter signal

Transmitter power supply: Board internal circuit power supply, compatible with conventional 24V passive transmitters

PCB flame retardant grade: UL94 V0

Installation method: 35mm standard DIN rail snap-in installation

Operating temperature: 0℃ to +60℃ inside the control cabinet

Circuit property: Passive transfer structure, with RC anti-interference filtering circuit

Protection: Each channel current-limiting protection to prevent short circuit damage to the AI card

IV. Interface and Communication Configuration

Internal connection end: Special flat ribbon cable plug directly inserted into MC-TAIH22 card, no independent communication unit, communication relies on UCN bus to be realized by the AI card

External field end: Screw-fixed wiring terminals, divided wiring positions for positive and negative terminals of the transmitter

Power supply relies on the 24VDC system power supply of the cabinet to feed the transmitter circuit

V. Core Functions

Isolate the force of thick-diameter instrument cables, protect the precise pins of the AI card from external damage

Built-in filtering circuit, weaken electromagnetic interference from frequency converters and motors, stabilize measurement values

Single-channel current-limiting protection, short circuit of the transmitter only affects this channel, will not break through the entire card

Regular instrument wiring in the cabinet, convenient for calibration, disconnection, and fault repair

VI. Application Scenarios

PKS UCN DCS projects in chemical, petrochemical, thermal power, papermaking, metallurgy, etc.

4–20mA two-wire intelligent transmitter signal acquisition of pressure, level, flow, temperature, etc.

8-point analog input points IO cabinet complete set

VII. Usage and Maintenance Instructions

Matching constraints: Can only be paired with MC-TAIH22 AI card, cannot be mixed with DI, DO, AO types FTA

Wiring requirements: Strictly distinguish the positive and negative of the transmitter according to terminal markings, prohibit reverse connection of positive and negative; Select shielded instrument cable, single-ended grounding of the shielding layer

Fault troubleshooting: No signal in measurement → Check terminal tightness → Measure the power supply current of the transmitter → Check wiring connection → Calibrate the MC-TAIH22 card after verification