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Description
Yokogawa RB301 S2 RIO Bus Interface Master Card
The Yokogawa RB301 S2 RIO Bus Interface Master Card, also cataloged as the RB301 Bus Interface Master Card, operates as a dedicated hardware component for managing communication and device coordination over the RIObus network within Yokogawa distributed control systems.
Hardware Specifications
Parameter
Specification
ModelBrand
Yokogawa RB301 S2
Origin
Japan
Weight
0.35 kg
Dimensions
Half-length PCI form factor
OperatingTemp
-20 to 60 degC
StorageTemp
-40 to 85 degC
Humidity
5 to 95% RH (non-condensing)
BusType
RIObus
BusSpeed
10 Mbps
ConnectorType
DB-37
PowerConsumption
5 W
Compatibility
Supports all Yokogawa RIObus devices; up to 31 devices per RIObus segment
Process Control Features
The RB301 supports 4-20 mA HART loop protocol signaling and provides channel-to-channel isolation to prevent electrical interference between adjacent communication paths. Cold junction compensation (CJC) is applied for temperature-sensitive signal stability. These characteristics ensure integrity and consistency of analog and digital data exchange between field instruments and central I/O modules.
Frequently Asked Questions
Q: Can the RB301 support hot-swap of RIObus devices? A: The RB301 does not natively support hot-swap; all device additions or replacements must be performed with system power disabled to maintain bus integrity.
Q: What is the maximum number of devices per RIObus segment? A: Up to 31 devices can be connected per RIObus segment. Exceeding this may result in communication failures.
Q: Is firmware upgrade required for compatibility with all Yokogawa devices? A: No firmware upgrade is generally required, but specific device models may necessitate system configuration updates for proper communication.
Field Installation Guidelines
Mount the card in a standard half-length PCI slot with proper grounding to minimize electrical noise.
Ensure that the DB-37 connector is securely fastened and shielded from adjacent high-voltage cables.
Maintain separation between communication wiring and power cables to reduce EMI.
Verify RIObus termination resistors are correctly installed at the physical endpoints of each segment.
Avoid mechanical stress on connectors; use cable supports for long runs exceeding 2 meters.
