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- Yokogawa
- SSB401-53
- ESB Bus Interface Slave Module
- Japan
- 110 mm × 22.5 mm × 100 mm
- 0.2kg
- Xiamen, China
- New & In Stock
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📘 Product Introduction – SSB401-53
The SSB401-53 is a Bus Interface Slave Module used in safety instrumented systems (SIS), particularly within Yokogawa’s ProSafe-RS platform. It provides a vital communication link between safety node units and the ESB (Enhanced Safety Bus). With its compact design, high reliability, and hot-swap capabilities, it ensures safe and uninterrupted operation in process industries such as oil & gas, chemical, power, and pharmaceutical plants.
This module serves as the slave interface to the ESB bus, which is responsible for transferring safety-critical data. It supports redundant communication, long cable runs, and is certified for functional safety applications compliant with IEC 61508 standards.
📊 Technical Specifications
| Parameter | Specification |
|---|---|
| Model | SSB401-53 |
| Type | ESB Bus Interface Slave Module |
| System Application | Safety Instrumented System (SIS) |
| Bus Communication | ESB Bus (Enhanced Safety Bus) |
| Communication Speed | 1 Mbps |
| Bus Redundancy Support | Yes |
| Hot Swap Capability | Supported |
| Rated Power Supply | 24 V DC |
| Power Consumption | Approx. 10 W |
| Functional Safety | Compliant with IEC 61508 (SIL 3 compatible) |
| Operating Temperature | –20 °C to +70 °C |
| Storage Temperature | –40 °C to +85 °C |
| Relative Humidity | 5% to 95% RH (non-condensing) |
| Ingress Protection | IP65 (when enclosed) |
| Vibration Resistance | Industrial standard compliant |
| Dimensions (H × W × D) | 110 mm × 22.5 mm × 100 mm |
| Weight | 0.2 kg |
| Installation | DIN rail or cabinet rack |
| Connector Type | Backplane bus connector / ESB connector |
🔧 Applications
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Used in safety control networks to interface safety node units with the ESB Bus.
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Commonly deployed in emergency shutdown systems (ESD), fire & gas systems, turbine safety logic, and other high-integrity process environments.
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Ensures real-time redundant communication of safety-related data.
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Applied in sectors like oil & gas, power generation, chemical plants, and pharmaceutical manufacturing.
✅ Key Advantages
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Redundant Communication: Dual ESB paths ensure communication continuity even in case of cable or port failure.
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Hot-Swappable: Allows replacement or maintenance without system downtime.
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Compact & Lightweight: Saves cabinet space, with only 22.5 mm width and 0.2 kg weight.
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Wide Operating Range: Reliable under harsh environmental conditions from –20 °C to +70 °C.
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Standards-Compliant: Designed according to IEC 61508 for safety-critical systems (SIL 3).
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Simple Integration: Seamless compatibility with ProSafe-RS and safety node units.
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Maintenance-Friendly: Easy to monitor, swap, or replace with minimal system impact.
🏷️ Brand & Series Information
| Field | Description |
|---|---|
| Brand | Yokogawa |
| Series | ProSafe-RS |
| System | Safety Instrumented System (SIS) |
| Compatible Units | SNB10D, SEC401-51, SCP451-53 |
| Bus Type | ESB Bus |
| Use Environment | Industrial automation, safety |
🔁 Related Models (Same Series or Functionally Similar)
| Model | Description | Dimensions (mm) | Weight (kg) | Notes |
|---|---|---|---|---|
| SSB401-51 | ESB Bus Interface Slave (legacy variant) | 110 × 22.5 × 100 | 0.2 | Similar function; older version |
| SNT411 | ESB Optical Master Repeater | 110 × 22.5 × 100 | 0.3 | For long-distance fiber connections |
| SNT511 | ESB Optical Slave Repeater | 110 × 22.5 × 100 | 0.3 | Works with SNT411 |
| SNB10D | Safety Node Unit | 123 × 122 × 100 | 1.4 | Connects to SSB401-53 for I/O processing |
| SCP451-53 | Analog Output Module for SIS | 123 × 122 × 100 | 1.5 | Outputs analog signals from safety logic |
⭐ Popular Yokogawa Models (Different Functions)
| Model | Description | Dimensions (mm) | Weight (kg) | Application |
|---|---|---|---|---|
| ADV151-P00 | Digital Output Module | 123 × 122 × 100 | 0.9 | General-purpose high-speed output |
| SEC401-51 | Discrete Input Module (SIS) | 123 × 30 × 100 | 0.18 | Accepts on/off signals from field devices |
| SCP451-11 | Safety Processor Module | 123 × 122 × 100 | 1.2 | Executes safety logic programs |
| SPW482-53 | Dual Output Power Supply Module | 99 × 22.5 × 114 | 0.34 | Supplies 5.1V/24V for node and field units |
| CP701 | Field Control Processor Module | 133 × 280 × 100 (approx) | 1.7 | Main processor in control stations |
❓ FAQ – SSB401-53
Q1: What is the main function of the SSB401-53 module?
A1: It serves as a slave interface to the ESB bus, enabling communication between safety node units and the rest of the safety system.
Q2: Is the SSB401-53 hot-swappable?
A2: Yes, it can be inserted or removed while the system is operating, without requiring shutdown.
Q3: What voltage does the module operate on?
A3: It operates on a 24 V DC power supply.
Q4: Is this module compliant with safety standards?
A4: Yes, it’s designed for use in systems certified to IEC 61508, supporting SIL 3 applications.
Q5: What systems is it compatible with?
A5: It is used with ProSafe-RS safety systems, typically connected to node units like SNB10D.
Q6: What’s the typical power consumption?
A6: Around 10 watts during normal operation.
Q7: What is the module’s size and weight?
A7: Dimensions are 110 mm × 22.5 mm × 100 mm and weight is approximately 0.2 kg.
Q8: Can it operate in extreme environments?
A8: Yes, it’s rated from –20 °C to +70 °C and up to 95% relative humidity (non-condensing).
Q9: How does it handle communication redundancy?
A9: It supports redundant ESB bus paths, ensuring continued operation if one path fails.
Q10: What type of installation is supported?
A10: Typically DIN rail or system rack mounting in ProSafe-RS cabinets.
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