The Yokogawa AGS813-S10 serves as a high-performance control interface specifically engineered for steam and gas turbine systems. Specifically, the module receives position feedback from LVDTs or standard 1 to 5 V DC signals to determine precise valve locations. It then generates a dedicated ±50 mA output signal to drive servo valves, ensuring stable and responsive machinery operation. Furthermore, the unit incorporates 24V DC digital inputs for "quick close" functionality. Therefore, the Yokogawa AGS813-S10 acts as a localized, high-speed governor that prioritizes mechanical safety and efficiency.
In terms of sensor compatibility, the module excels at handling various LVDT (Linear Variable Differential Transformer) wiring configurations. Specifically, users can connect 3-wire, 5-wire, or 6-wire sensors directly to the four isolated input channels. The module also provides an onboard excitation frequency selectable between 2.8 kHz and 3.2 kHz. Meanwhile, for systems using standardized transmitters, the module offers four isolated voltage inputs with a high accuracy of ±4 mV. This flexibility allows engineers to integrate the module into both legacy and modern turbine control frameworks.
Regarding processing speed, the Yokogawa AGS813-S10 maintains a rapid 5 ms scan cycle to meet the demands of turbomachinery protection. Specifically, this fast update rate allows the control system to react to load changes or emergency trip conditions almost instantaneously. Additionally, the module features robust electrical isolation with a withstanding voltage of 500 V AC between the field wiring and the system logic. This isolation protects the core Centum VP controllers from electrical surges or ground loops originating in the harsh field environment of the turbine deck.
The module includes two isolated current output channels that support either ±25 mA or ±50 mA ranges. Specifically, these outputs feature an adjustable dither function (up to ±20%) at 33 Hz to prevent valve stiction and ensure smooth mechanical movement. Furthermore, the module includes circuit-open detection to alert operators immediately if a connection to the servo valve fails. Meanwhile, the sinking digital inputs allow for rapid 1 ms response times when the system triggers a quick-close sequence for emergency shutdowns.
Specifically, the Yokogawa AGS813-S10 is a compact "Standard Type" module weighing approximately 0.36 kg. It requires an external power supply of +11.4 to +13.2 V DC to drive the field-side excitation and servo circuits. Moreover, the module utilizes dedicated cables from the AKB337 series to connect to external terminal boards. Its low power consumption of 500 mA ensures that it integrates efficiently into the thermal budget of standard FIO node units, even under continuous high-speed operation.
First, verify that the module address switches and LVDT excitation frequencies match your specific field sensor requirements. Next, insert the Yokogawa AGS813-S10 into a compatible FIO node unit slot until the backplane connectors seat firmly. After that, connect the dedicated AKB337 interface cable to the front connector and secure it tightly. Finally, use the system engineering software to calibrate the 1-5V or LVDT feedback span against the physical valve stroke. This ensures the ±50 mA output aligns perfectly with the desired valve position during commissioning.
1 x Yokogawa AGS813-S10 Servo Module (Isolated)
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Q: How many LVDT sensors can the AGS813-S10 support? Specifically, the module provides four isolated LVDT input channels, each capable of supporting 3, 5, or 6-wire configurations.
Q: What is the purpose of the dither function on the output? The dither function applies a small, high-frequency oscillation to the ±50 mA output to keep the servo valve moving slightly, preventing mechanical stiction.
Q: Which cables are required for external connection? The module requires dedicated Yokogawa AKB337 series cables, specifically the M005 (0.5m), M007 (0.7m), or M010 (1.0m) variants.
Q: Can I use this module for emergency quick-close functions? Yes, the module features two isolated digital inputs specifically designed for quick-close signals with a typical 1 ms delay.
Q: Does the module provide its own excitation for LVDTs? Specifically, the module generates a 5Vrms excitation signal, but it requires an external 12V DC power supply to provide the necessary current.
| Brand Name | Yokogawa Electric |
| Model No. | AGS813-S10 |
| Product Type | Servo Module (Isolated) |
| hasMerchantReturnPolicy | Adjust according to reality |
| Shippingdetails | Adjust according to reality |
