Overview
Manuals
Important Notes
Target Applications
Features:
1. Dual-Chemistry Regulatory Profile
- Hybrid Classification: It is labeled under a dual "Nickel-Metal Hydride / Nickel-Cadmium" safety profile to comply with legacy global documentation.
- True Eco-Friendly Chemistry: The actual internal core is built entirely of Nickel-Metal Hydride (Ni-MH), eliminating toxic cadmium and making disposal much cleaner.
2. High-Density Dual-Cell Architecture
- 2S1P Configuration: It connects two premium 1.2V industrial cells in a series circuit to deliver a consistent 2.4V DC output rail.
- Scalable Runtime Capacity: Available in capacities ranging from 1100 mAh to 1500 mAh. The higher-capacity variants expand the safety window, keeping data locked for longer periods during multi-day facility shutdowns.
3. Immediate Data & Real-Time Clock Protection
- Instantaneous Engagement: The battery cuts in with zero downtime the millisecond main AC power drops, preventing system brownouts or resets.
- Static RAM (SRAM) Safeguard: It powers volatile memory slots to preserve crucial operational parameters, including PID coefficients, alarm configurations, and historical event logs.
- Continuous RTC Keeping: It keeps the system's Real-Time Clock (RTC) perfectly synchronized so that time-stamped diagnostic data remains accurate upon power restoration.
4. Ruggedized Industrial Enclosure
- Vibration and Shock Resistance: Built to withstand the constant micro-vibrations inherent in factory floors and heavy machinery environments.
- Heavy-Duty Insulation: Features thick, heat-resistant outer shrink-wrap insulation to prevent accidental short-circuits against adjacent metal rack chassis components.
- Pre-Crimped Plug-and-Play Lead Wire: Equipped with polarized, keyed wire connectors that match legacy Yokogawa module pins perfectly, preventing reverse-polarity installation errors.
5. Extreme Thermal Tolerance
- Wide Operating Bandwidth: Operates reliably in temperature extremes from -20°C to +70°C.
- Heavy-Duty Insulation: Features thick, heat-resistant outer shrink-wrap insulation to prevent accidental short-circuits against adjacent metal rack chassis components.
- Optimized Trickle-Charge Design: Chemically formulated to handle continuous, low-current float charging from the host system without suffering from severe "memory effect" degradation.
As a key physical interface in the system, this module is responsible for seamlessly integrating complex input and output signals from the field into the ESB extended bus network. It not only ensures high-frequency, stable bidirectional transmission of massive amounts of industrial data between the control layer and field I/O modules, but also significantly improves the real-time response speed and multi-node collaboration capabilities of the entire distributed system.
In addition to basic signal connection functions, the A2EE1A-T integrates crucial bus termination impedance matching. In distributed industrial networks, long-distance transmitted electrical signals are highly susceptible to waveform reflections at bus termination points, leading to data loss or communication distortion. The A2EE1A-T addresses this issue with a built-in precision terminating resistor, specifically deployed at the physical end of the bus to absorb residual electromagnetic signals.
The S9129FA YOKOGAWA Connector unit with terminator for ESB Bus may still be available for purchase and support from Moore Automated Company beyond End-Of-Life (EOL) by the manufacturer (OEM).
YOKOGAWA S9129FA Connector unit with terminator for ESB Bus DATASHEET(manual), Link
Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.
1. Lifespan & Temperature
- Temperature Sensitive: Lasts 3 years at ≤30°C, drops to 1.5 years at 40°C, and only 9 months at 50°C.
- Backup Window: Sustains memory data for a maximum of 72 hours when primary system power is lost.
2. Live Replacement (Hot Swapping)
- Power MUST Be ON: Never remove the battery while the system is powered down. It must be replaced while the DCS main power is ON; otherwise, SRAM memory wipes instantly.
3.Pre-Replacement Steps
- Backup First: Manually trigger a full system backup at the engineering workstation (ENG) before touching the hardware.
- Part Verification: Ensure the replacement perfectly matches the original or cross-reference codes HHR-11F2A1 / HHR-11F2G2.
1. Target Hardware
- CENTUM CS 3000 / CS 1000: Field Control Stations (FCS) and main processor units.
- Yokogawa VFD10D: Onboard memory cell for this specific control/drive board.
- Yokogawa PLCs: Backup power for compatible programmable logic controllers.
2. Functional Tasks
- SRAM Preservation: Prevents loss of control logic, network parameters, and recipes during blackouts.
- RTC Continuity: Keeps internal system clocks running for accurate event time-stamping.
- Fast Recovery: Enables immediate hot-rebooting without needing a full system download.
3. Core Industries
- Oil & Gas: Refinery automation and pipeline control.
- Power Plants: Boiler and steam turbine control systems.
- Chemicals: Hazardous batch processing and blending lines.
