Configured for high-reliability DC voltage regulation in CENTUM VP/CS distributed control systems, the Yokogawa ATRBS-00 S2 (ATRBS Power Supply Module) provides direct physical/electrical execution. This hardware subassembly steps down standard 24 V DC input loops to feed regulated 5 V DC logic voltage directly onto the FIO backplane bus structure. The unit operates inside a dual-configuration power architecture, delivering continuous low-voltage output capacities to adjacent input/output field modules even during primary component faults.
| Parameter | Specification |
|---|---|
| Model | ATRBS-00 S2 |
| Brand | Yokogawa Electric Corporation |
| Origin | Japan |
| Weight | 0.35 kg |
| Dimensions | 130 x 127.2 x 32.8 mm |
| Operating Temp | -20 to +70 deg C |
| Power Consumption | ~15 W typical |
| Input Voltage | 24 V DC (Operational range: 20.4-26.4 V DC) |
| Output Voltage | 5 V DC |
| Output Current Capacity | Up to 10 A |
| Redundancy | Dual power supply configuration supported |
| Isolation | 2 kV AC (Input-to-output, 1 min) |
| Protection Features | Overcurrent protection, overvoltage protection, thermal shutdown |
| Storage Temperature | -40 to +85 deg C |
| External Connection | MIL connector cable |
| Environmental Protection | ISA Standard G3 conformal coating |
The power module architecture incorporates high-integrity channel-to-channel isolation networks alongside specialized diode-ORing redundancy control circuits. An integrated galvanic barrier enforces a 2 kV AC input-to-output dielectric isolation rating for 1 minute, preventing field-side electrical surges from damaging the low-voltage processor backplane. The module tracks internal thermal profiles continuously, engaging a non-latching thermal protection circuit if component temperatures cross safe thresholds. The S2 suffix designates standard integration of ISA Standard G3 conformal coatings, which actively prevent copper creepage and trace corrosion caused by ambient hydrogen sulfide, sulfur dioxide, or high humidity levels.
Q: What is the load balancing behavior when two modules operate in a redundant configuration?
A: The redundant pairing utilizes internal diode auctioneering circuits to handle load allocation. If one module experiences a drop in input voltage or an internal component failure, the secondary power supply assumes the full 10 A load current without causing voltage dips on the 5 V DC backplane bus.
Q: Can this module be hot-swapped while the FIO baseplate is actively powered?
A: Yes, the module supports online replacement under live system conditions. The integrated overcurrent and soft-start circuits suppress inrush currents during insertion, preventing localized voltage drops that could disrupt the operation of adjacent active I/O modules.
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