The Yokogawa S9451DB (commonly seen as S9451DB-03) is a Remote I/O (RIO) bus interface master module used in Yokogawa CENTUM CS / CENTUM VP Distributed Control Systems (DCS).
It is designed to act as the primary communication master between the central controller and distributed remote I/O nodes, enabling high-speed, synchronized data exchange across large-scale automation systems. This module is a key part of Yokogawa’s RIO architecture, which supports scalable and modular plant-wide control.
In industrial applications, the S9451DB ensures stable real-time communication, deterministic data transfer, and reliable integration of remote field I/O systems.
Technical Specifications
| Parameter | Specification |
|---|---|
| Brand | Yokogawa |
| Model | S9451DB (e.g., S9451DB-03) |
| Product Type | RIO Bus Interface Master Module |
| Function | Remote I/O bus communication control |
| System Compatibility | CENTUM CS / CENTUM VP |
| Bus Type | Yokogawa RIO Bus |
| Communication Role | Master controller for remote I/O nodes |
| Data Handling | Real-time deterministic process data exchange |
| Power Supply | 24 V DC (system dependent) |
| Installation Type | Rack-mounted DCS module |
| Operating Temperature | -20°C to +60°C |
According to industrial module listings, the S9451DB is used as a core RIO communication interface module connecting controller systems with distributed I/O racks.
Physical Characteristics
| Item | Specification |
|---|---|
| Dimensions (W × H × D) | Approx. 25 × 254 × 203 mm |
| Weight | Approx. 0.3 kg |
| Mounting Type | Rack / control cabinet installation |
| Structure | Industrial communication interface board |
| Cooling | Natural convection in DCS cabinet |
Recommended Related Models
- Yokogawa S9345FA – ESB bus connector unit
- Yokogawa S9346FA – ESB connector with terminator
- Yokogawa S9341FA – ESB bus terminator module
- Yokogawa NFCP100 – communication processor module
- Yokogawa CP471 – controller CPU module
Popular Yokogawa Models
- Yokogawa S9451DB – RIO bus interface master module
- Yokogawa NFCP100 – network communication processor
- Yokogawa ADV551 – digital output module
- Yokogawa ADV161 – digital input module
- Yokogawa CENTUM VP – distributed control system platform
