AST143-S00-S1 Yokogawa Analog Input Module

Yokogawa AST143-S00-S1 CENTUM VP Thermocouple Input Module

Yokogawa AST143-S00-S1 CENTUM VP Thermocouple Input Module

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YOKOGAWA AST143-S00-S1 CENTUM VP Input Module Configured for high-density thermal sensor acquisition in CENTUM VP FIO distributed control networks, the...

رمز المنتج: AST143

Manufacturer: Yokogawa
Product No.: AST143
Product Type: Analog Input Modules
Product Origin: JAPAN
Payment:T/T, Western Union
Weight: 300g
Shipping port: Xiamen
Warranty: 12 months

وصف التقييمات

YOKOGAWA AST143-S00-S1 CENTUM VP Input Module

Configured for high-density thermal sensor acquisition in CENTUM VP FIO distributed control networks, the YOKOGAWA AST143-S00-S1 (AST143 TC/mV Input Module) provides direct physical/electrical execution. The hardware targets multi-channel sensor loops, directly converting low-level voltage variables from thermocouples, resistance temperature detectors (RTDs), thermistors, and potentiometers into digital data frames. The module uses internal reference circuits to process multi-range thermal data while protecting the base network from external field anomalies.

Hardware Specifications

Parameter	Specification
Model	AST143-S00-S1
Brand	Yokogawa
Origin	Germany
Weight	0.30 kg
Dimensions	120 mm (W) x 100 mm (D) x 39 mm (H)
Operating Temp	-20 to +70 deg C
Power Consumption	150 mA at 5 VDC / 80 mA at 24 VDC
Channel Density	16 isolated channels
Supported Input Types	Thermocouples (B, E, J, K, N, R, S, T), Millivolt (±100 mV), RTDs, Thermistors, POT (0-10 kΩ)
Temperature Range Limit	Thermocouples: -200 to 1500 deg C; RTDs: -200 to 800 deg C
Base Accuracy (at 23 deg C)	Thermocouples: ±40 μV; Millivolt: ±80 μV; Span: ±0.2%
Input Resistance	1 MΩ minimum
Isolation Voltage	1500 VAC between field circuits and system channels
Data Update Period	10 ms execution cycle
Environmental Shielding	ISA S71.04 Class G3 conformal coating

DCS Temperature Input Performance & Cold Junction Compensation

The hardware framework incorporates dedicated cold junction compensation (CJC) circuits directly at the field wiring interface terminal block, delivering a tracking accuracy threshold within ±1 deg C. This configuration minimizes thermal gradient errors across the terminal junctions by continuously matching the physical sensor connection points against internal reference voltages. Furthermore, the 1500 VAC galvanic isolation barriers suppress common-mode electrical noise and eliminate localized ground loop paths, preventing voltage spikes from degrading adjacent 4-20 mA HART loop protocol lines or low-level millivolt measurement channels on the system node.

Frequently Asked Questions

Q: How does the AST143-S00-S1 handle sensor burnout detection across its 16 channels?

A: The module runs continuous open-circuit diagnostic checks by injecting a low-current pulse across the input terminals. If a thermocouple element breaks or an RTD lead disconnects, the input resistance surpasses the 1 MΩ limit, causing the firmware to flag a burnout status bit and light the hardware diagnostic LED.

Q: What precautions prevent measurement drift when operating at the limits of the temperature range?

A: The module internal software compensates for thermal drift, keeping errors within ±125 μV per 10 deg C for thermocouples. To maintain high system accuracy across wide temperature fluctuations, engineers should utilize external reference junctions or place the module in temperature-controlled instrument enclosures.

Q: Can this module mix different sensor types, like Type K thermocouples and Pt100 RTDs, simultaneously?

A: Yes. Technicians can configure each of the 16 isolated channels independently via the CENTUM VP engineering software platform. The internal microprocessors apply distinct linearizing algorithms and scaling parameters to each channel during the 10 ms update cycle.

Field Installation Guidelines

Chassis Rail Engagement: Slide the module along the designated slot guides of the FIO rack until the backplane pins lock into place. Secure the assembly using the integrated faceplate fasteners to establish case grounding.
Shield Grounding Matrix: Connect all external thermocouple extension and RTD shielded cables to a clean instrument ground bar. Keep unshielded wire leads short near the terminal block to reduce electromagnetic noise pickup.
Cable Pathway Separation: Route low-level millivolt and sensor cabling through independent, grounded wire ducts. Maintain a physical clearance of at least 300 mm from high-current AC power cables and motor drive lines.
Airflow Verification: Ensure that the vertical ventilation clearances around the FIO chassis remain free of blockages. Verify that the enclosure cooling equipment keeps the ambient operating temperature below the 70 deg C maximum operational threshold.

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رئيس قسم الهندسة، ألمانيا

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