Yokogawa S2SC70D Duplexed Safety Control Unit

The Yokogawa S2SC70D Duplexed Safety Control Unit is a high-reliability, rack-mounted control unit designed for safety-critical applications. Supporting both N-IO and FIO architectures, it ensures dual-redundant operation, making it ideal for industries requiring stringent safety integrity.

Technical Specifications

Applications

• Safety Instrumented Systems (SIS) in process industries

• Emergency shutdown (ESD) systems

• Burner management systems (BMS)

• Turbomachinery protection

• Pipeline safety monitoring

• Chemical and petrochemical plant control

Advantages

• Dual-redundant configuration ensures high availability

• Supports both N-IO and FIO, offering flexibility

• Wide operating temperature range available

• Modular, rack-mounted design simplifies maintenance

• Meets international safety and EMC standards

• Memory protection with non-volatile storage and battery backup

FAQ

Q1: What is the main advantage of the S2SC70D over the S2SC70S?

A1: The S2SC70D offers a duplexed (redundant) configuration, enhancing system reliability and fault tolerance.

Q2: Which communication network does it use?

A2: It uses dual-redundant Vnet/IP for control network communications.

Q3: Does the unit support both N-IO and FIO?

A3: Yes, it is compatible with both N-IO and FIO architectures.

Q4: What is the operating temperature range?

A4: The standard model operates from -20°C to +40°C; the wide-range model supports up to +70°C.

Q5: How is the application program protected during power failures?

A5: The program is stored in non-volatile memory with battery-backed storage for management data.

Q6: How many I/O nodes can be connected?

A6: Up to 32 N-IO nodes and 13 Safety Node Units can be connected.

Q7: What are the power supply options?

A7: It supports 100–120 V AC, 220–240 V AC, and 24 V DC power supplies.

Q8: How often should the backup battery be replaced?

A8: Recommended replacement cycle is every 3 years under normal temperature conditions.

Q9: Is it suitable for hazardous areas?

A9: Yes, explosion-protected versions are available with appropriate options.

Q10: How is it mounted?

A10: It is rack-mounted using standard M5 screws and comes with insulating bush accessories.