2. Product Function Description

1. Independent Channel Galvanic Isolation

   Each loop is equipped with isolated isolation circuit to completely separate DCS internal circuit and field instrument loop, eliminate ground loop offset caused by different grounding potentials of workshop equipment, suppress frequency converter EMI, static electricity and lightning surge interference, guarantee stable measurement accuracy.

2. Signal Filtering & Surge Protection

   Built-in RC multi-stage low-pass filter and TVS transient suppression components for each channel, filter high-frequency noise of long-distance cables, clamp abnormal high voltage to avoid damage to the main AI IOP card.

3. Standard Screw Terminal (-125 Core Feature)

   Conventional anti-loose screw wiring terminal, compatible with 14–22AWG instrument shielded cables, convenient for field wiring inspection and maintenance, stable connection under mild vibration environment.

4. Loop Fault Detection Matching IOP

   Cooperate with MU-PAI02 IOP to realize open circuit, short circuit and out-of-range signal diagnosis of transmitter loops, fault information is uploaded to UCN bus and displayed on operator station alarm interface.

5. Non-redundant Standard Layout

   Suitable for most conventional measurement loops; for high-reliability redundant measurement points, select corresponding redundant isolation AI FTA series.

3. Core Electrical Technical Specifications

1. Channel Quantity：8 independent galvanically isolated analog input channels

2. Supported Signal：4–20mA DC two-wire / four-wire transmitter standard signal

3. Isolation Withstand Voltage：1500VAC isolation between channel and backplane

4. Measurement Precision：Signal transmission linearity error ≤ ±0.05% FS

5. Terminal Type：Ordinary anti-loose screw terminal

6. PCB Feature：No anti-corrosion conformal coating, suitable for dry indoor control room

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

8. Channel Protection：Independent short-circuit self-recovery, ESD and surge suppression

9. Power Supply：24VDC power taken from HPM/APM rack backplane

10. Maximum Power Consumption：0.9W full load

11. Hot Swap：Support online replacement without powering off the rack

4. Industrial Application Scenarios

1. Chemical & Petrochemical Industry

   Reactor, distillation tower flow, pressure, liquid level transmitter signal acquisition; solve signal drift caused by multi-equipment potential difference, used in indoor clean central control room cabinets.

2. Thermal Power Industry

   Boiler drum level, flue gas pressure, steam pressure measurement signal isolation, filter interference from fans, water pump frequency converters.

3. Oil & Gas Industry

   Pipeline flow transmitters, tank area pressure and level instrument signal wiring isolation, improve stability of long-distance instrument cable signals.

4. General Process Industry

   Water treatment, pharmaceutical plant indoor control cabinet analog measurement loop anti-interference transformation.

5. Model Selection Guide

• Select 51304640-125：Ordinary indoor cabinet, demand low cost, regular screw wiring, no high humidity and corrosive gas.

• Select 51304640-175：Workshop with slight humidity, anti-vibration CC screw terminals, partial PCB coating.

• Select 325 series：Spring quick crimp terminals, fast wiring during overhaul, indoor clean environment.

• Select 375 series：Full anti-corrosion coating, spring terminals, coastal, high humidity and corrosive gas harsh cabinets.