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Yokogawa AST143-S00 TC/mV Input Module
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- Part Number: AST143-S00
- Brand: Yokogawa
- Type: Temperature Input Modules
- Dimensions: 3.3x10.7x13cm
- Country of Origin: Japan
- Barcode: 8537101190
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Additional Specifications
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Descripción del Producto
Configured for high-accuracy thermocouple and millivolt signal measurement in Yokogawa DCS systems, the Yokogawa AST143-S00 (AST143 TC/mV Input Module) provides direct physical/electrical execution. It processes up to 16 input channels and transmits conditioned data across the system backplane with minimal propagation delay.
Suffix Breakdown & Model Matrix
The base module designation AST143 defines the 16-channel thermocouple and millivolt input processing hardware architecture. The -S00 suffix specifies the standard hardware option set, incorporating built-in isolation and standard system integration features without custom barrier modifications.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | AST143-S00 |
| Brand | Yokogawa |
| Origin | Japan / Singapore |
| Weight | 0.30 kg |
| Dimensions | 120 mm x 100 mm x 39 mm (W x H x D) |
| Operating Temp | -20 to 70 deg C |
| Power Consumption | 150 mA at 5 VDC, 80 mA at 24 VDC |
| Number of Channels | 16 |
| Input Signal Types | Thermocouple (TC), Millivolt (mV) |
| Input Ranges | TC: -200 to 1500 deg C; RTD: -200 to 800 deg C; Thermistor: -50 to 150 deg C |
| Output | 4 to 20 mA |
| Accuracy | +/-0.2% of span; TC: +/-40 uV, mV: +/-80 uV at 23 deg C |
| Communication Protocol | HART |
| Power Supply | 24 VDC +/-10% |
| Input Resistance | >= 1 Mohm (Power ON/OFF) |
| Data Update Period | 10 ms |
| Withstanding Voltage | 1500 VAC between circuits and channels |
DCS Signal Integrity & Process Control Architecture
- 4-20 mA HART Loop Protocol Execution: Supports bidirectional HART digital communication layered over standard 4-20 mA output loops for remote device configuration and diagnostics.
- Channel-to-Channel Electrical Isolation: Features an integrated isolated barrier rated for 1500 VAC withstanding voltage between circuits and individual channels to eliminate common-mode ground loops.
- Cold Junction Compensation (CJC): Utilizes integrated reference junction compensation with +/-1 deg C accuracy to ensure accurate thermocouple voltage conversion across ambient thermal variations.
Frequently Asked Questions
Q: Can the AST143-S00 module be inserted or removed while the 24 VDC field supply remains active?
A: Yes. The hardware design allows live insertion and removal from the backplane, provided that field wiring circuits adhere to localized hazardous area safety precautions.
Q: What is the input impedance behavior of the module when backplane power is removed?
A: The input resistance remains >= 1 Mohm in both Power ON and Power OFF states, preventing loading effects on active field measurement loops.
Field Installation Guidelines
Mount the AST143-S00 securely into the designated slot on the field control station baseplate, ensuring the locking mechanism fully engages. Route thermocouple extension wires and millivolt signal leads separately from high-voltage AC cables to prevent electromagnetic coupling. Connect signal cable shielding to a single dedicated functional earth point. Verify that the ambient operating temperature inside the cabinet remains within -20 to 70 deg C to maintain measurement drift within the specified limits.
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