Yokogawa RB301 S2 RIO Bus Interface Master Card
The Yokogawa RB301, also cataloged as the RB301 S2 RIO Bus Interface Master Card, operates as a dedicated hardware component for high-speed remote I/O serial communication and bus arbitration within Yokogawa CENTUM CS 3000 and CENTUM VP DCS platforms. Operating across dual-redundant bus lines, the card manages data packet serialization, frame synchronization, and deterministic token passing between central processing units and remote node interface units.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | RB301 |
| Brand | Yokogawa |
| Origin | Japan |
| Weight | 3.0 kg (6.61 lbs) |
| Dimensions | Standard Rack-Mount Module Profile |
| Operating Temp | -20 to 60 deg C |
| Power Consumption | System Backplane Bus Powered |
| Bus Interface Type | S2 RIO Bus Master Interface |
| Redundancy Support | Dual-Redundant RIO Bus Line Configuration |
| System Platform | Yokogawa CENTUM Series DCS |
| Module Category | Remote I/O Bus Interface Master Card |
Channel Isolation & Field Signal Routing
The RB301 incorporates optical galvanic isolation and channel-to-channel isolation circuitry across all backplane-to-bus transmission channels. This architecture isolates high-speed system bus logic from field-induced electrical transients, common-mode potential differences, and ground loop noise. The interface master maintains transparent pass-through for downstream field instrument data, preserving 4-20 mA HART loop protocol signal structures and digital FSK modulation across remote I/O sub-networks.
Frequently Asked Questions
Q: How does the RB301 handle fault transfer in redundant bus configurations?
A: When deployed in a dual-redundant configuration, the RB301 continuously monitors bus carrier signals and automatically switches data transmission to the secondary RIO line without interrupting CPU execution.
Q: Can the RB301 be hot-swapped during active system operation?
A: Yes, provided the host CENTUM rack backplane supports online insertion and removal, the RB301 can be replaced while the redundant partner card maintains active bus communication.
Field Installation Guidelines
- ESD Protection: Wear a grounded wrist strap attached to cabinet functional earth before handling or inserting the RB301 master card.
- Rack Insertion: Align the card edge guide rails squarely with the backplane slot, sliding the unit firmly until the latch levers click and lock into place.
- Coaxial Cable Connection: Tighten BNC or dedicated connector jackscrews on the S2 RIO bus cables to ensure low-impedance high-frequency shielding continuity.
- Bus Termination: Verify that 75 ohm or designated line termination units are installed on unused terminal ports at both physical ends of the S2 RIO cable segment.
- Earth Grounding: Connect cabinet grounding bars directly to the system master earth bus with low-impedance copper braid to mitigate high-frequency signal noise.
Yokogawa RB301 S2 RIO Bus Interface Master Card
Yokogawa RB301 S2 RIO Bus Interface Master Card
The Yokogawa RB301, also cataloged as the RB301 S2 RIO Bus Interface Master Card, operates as a dedicated hardware component for high-speed remote I/O serial communication and bus arbitration within Yokogawa CENTUM CS 3000 and CENTUM VP DCS platforms. Operating across dual-redundant bus lines, the card manages data packet serialization, frame synchronization, and deterministic token passing between central processing units and remote node interface units.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | RB301 |
| Brand | Yokogawa |
| Origin | Japan |
| Weight | 3.0 kg (6.61 lbs) |
| Dimensions | Standard Rack-Mount Module Profile |
| Operating Temp | -20 to 60 deg C |
| Power Consumption | System Backplane Bus Powered |
| Bus Interface Type | S2 RIO Bus Master Interface |
| Redundancy Support | Dual-Redundant RIO Bus Line Configuration |
| System Platform | Yokogawa CENTUM Series DCS |
| Module Category | Remote I/O Bus Interface Master Card |
Channel Isolation & Field Signal Routing
The RB301 incorporates optical galvanic isolation and channel-to-channel isolation circuitry across all backplane-to-bus transmission channels. This architecture isolates high-speed system bus logic from field-induced electrical transients, common-mode potential differences, and ground loop noise. The interface master maintains transparent pass-through for downstream field instrument data, preserving 4-20 mA HART loop protocol signal structures and digital FSK modulation across remote I/O sub-networks.
Frequently Asked Questions
Q: How does the RB301 handle fault transfer in redundant bus configurations?
A: When deployed in a dual-redundant configuration, the RB301 continuously monitors bus carrier signals and automatically switches data transmission to the secondary RIO line without interrupting CPU execution.
Q: Can the RB301 be hot-swapped during active system operation?
A: Yes, provided the host CENTUM rack backplane supports online insertion and removal, the RB301 can be replaced while the redundant partner card maintains active bus communication.
Field Installation Guidelines
- ESD Protection: Wear a grounded wrist strap attached to cabinet functional earth before handling or inserting the RB301 master card.
- Rack Insertion: Align the card edge guide rails squarely with the backplane slot, sliding the unit firmly until the latch levers click and lock into place.
- Coaxial Cable Connection: Tighten BNC or dedicated connector jackscrews on the S2 RIO bus cables to ensure low-impedance high-frequency shielding continuity.
- Bus Termination: Verify that 75 ohm or designated line termination units are installed on unused terminal ports at both physical ends of the S2 RIO cable segment.
- Earth Grounding: Connect cabinet grounding bars directly to the system master earth bus with low-impedance copper braid to mitigate high-frequency signal noise.
