Description

Yokogawa AAR145-S03 RTD/POT Input Module

Configured for RTD and potentiometer signal acquisition in CENTUM and related Yokogawa DCS architectures, the Yokogawa AAR145-S03 (AAR145 RTD/POT Input Module) provides direct electrical interface processing across isolated multi-channel input assemblies. The module supports 16 RTD/POT input channels with channel isolation and dual-redundant configuration capability for distributed process instrumentation loops.

Hardware Specifications

Parameter	Specification
Model	AAR145-S03
Brand	Yokogawa
Product Type	RTD/POT Input Module
Input Signal Types	RTD, Potentiometer
RTD Standard Compatibility	JIS C1604:1997, IEC751
Number of Channels	16 isolated channels
Redundancy Support	Dual-redundant configuration
Isolation	Channel-to-channel electrical isolation
Dimensions	3.3 cm x 10.7 cm x 13 cm
Weight	0.3 kg
Operating Temp	-20 degC to +60 degC
Humidity	5 % to 95 % RH non-condensing
Mounting Method	DCS rack/backplane installation
Diagnostic Functions	Real-time monitoring and fault detection
Origin	Japan

Channel-to-Channel Isolation Characteristics

The AAR145-S03 input architecture implements electrical isolation between individual acquisition channels to reduce common-mode interference propagation inside multi-point RTD and potentiometer measurement loops. Isolation separation assists in maintaining measurement stability during mixed-field wiring conditions involving grounded thermowells, shielded sensor cables, and distributed cabinet grounding structures.

The module supports direct resistance signal processing according to IEC751 and JIS C1604:1997 RTD characteristics. Input conversion handling is executed internally through dedicated analog acquisition circuitry associated with each channel group.

Frequently Asked Questions

Q: Does the AAR145-S03 support redundant installation configurations?
A: Yes. The module supports dual-redundant configuration arrangements within compatible Yokogawa control system architectures.

Q: Are all 16 input channels electrically isolated from each other?
A: The module specification identifies isolated channel construction intended to reduce electrical interference between connected RTD and potentiometer circuits.

Q: Can the module directly accept potentiometer input devices without external signal converters?
A: Yes. The module is designed for direct RTD and POT signal input handling without requiring separate external analog conversion hardware.

Field Installation Guidelines

• Use shielded twisted-pair instrumentation cable for RTD and potentiometer wiring routes.
• Maintain physical separation between low-level analog signal wiring and AC power conductors inside control cabinets.
• Terminate cable shielding at a single grounding reference point to reduce ground loop current circulation.
• Verify RTD lead continuity and insulation resistance before field termination to the module terminal assembly.
• Avoid parallel routing with variable frequency drive output cables or high-current switching conductors.
• Confirm ambient cabinet temperature remains within the specified -20 degC to +60 degC operating range.
• During redundant installation, confirm slot addressing and backplane assignment consistency before energizing the rack.

Specifications

• Brand: Yokogawa

Advantages

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