Description

Yokogawa AAI141-H00/CCC01 Analog Input Module

Configured for 4-20 mA current acquisition in Yokogawa CENTUM VP DCS Field Input architecture, the Yokogawa AAI141-H00/CCC01 (AAI141-H00/CCC01 Analog Input Module) provides direct physical/electrical execution of multi-channel current loop measurement with HART protocol overlay for field device communication across CENTUM VP and CENTUM CS 3000 I/O networks.

Suffix Breakdown & Model Matrix

• AAI141: 16-channel analog input module for 4-20 mA DC signals
• H: HART communication enabled interface layer
• 00: base configuration index
• CCC01: connector cover option for MIL cable termination protection

Hardware Specifications

Parameter	Specification
ModelBrand	Yokogawa AAI141-H00/CCC01
Origin	Japan
Weight	0.2 kg
PowerConsumption	Backplane powered, value not specified
Input Channels	16 channels
Input Signal	4-20 mA DC
Allowable Input Current	27 mA max
Accuracy	+/-16 uA
Communication	HART protocol enabled

Yokogawa HART Loop Integration and Channel Acquisition Behavior

The module implements 4-20 mA loop acquisition with embedded HART digital superimposition, enabling simultaneous analog process variable sampling and field device parameter exchange. HART frames are demodulated in parallel with current measurement without interrupting loop continuity. Channel aggregation is performed at backplane level with synchronized scan timing to maintain deterministic input refresh across 16 channels. Signal integrity is maintained through loop impedance matching and controlled current sink architecture at the input stage.

Frequently Asked Questions

Q1: Can individual channels operate independently under HART communication?
A1: Yes. Each channel supports independent HART communication while maintaining parallel 4-20 mA analog acquisition without shared modulation dependency.

Q2: Does the module support hot-swap insertion on the backplane?
A2: Hot-swap capability depends on system rack configuration. Electrical isolation is handled at rack level; field loops must remain powered during module replacement per system design rules.

Q3: What is the effect of channel density on scan cycle behavior?
A3: All 16 channels are multiplexed through internal acquisition logic. Increased channel utilization does not change per-channel resolution but affects total scan frame scheduling.

Field Installation Guidelines

• Ensure 4-20 mA loops are de-energized or current-limited before terminal engagement.
• Maintain MIL connector alignment before securing the CCC01 connector cover.
• Use shielded twisted pair cabling for all HART-enabled loops to reduce high-frequency interference coupling.
• Ground cable shields at a single-point earth reference within the marshalling cabinet.
• Verify loop polarity and transmitter compliance voltage before system energization.
• Avoid routing input signal cables parallel to high-voltage switching conductors.

Specifications

• Brand: Yokogawa

Advantages

• High reliability in industrial environments
• Supports continuous operation
• Compatible with major PLC/DCS systems