ABB DSSR122 4899001-NK Power Supply

Description

Key Technical Specifications

• Manufacturer: ABB

• Part Number: 4899001-NK

• Product Type: DC Power Supply + Safety Relay Composite Module

• Input Voltage: 24 V DC (18…30 V)

• Output Voltage: 5 V DC (regulated)

• Output Current: 40 A

• Power Rating: 200 W

• Efficiency: ≥ 85%

• Safety Contacts: 2 NO + 2 NC (force-guided relays)

• Contact Rating: 6 A @ 250 V AC

• Safety Response Time: ≤ 20 ms

• Safety Level: SIL 2 / PL d (compliant with EN 61508)

• Isolation Voltage: 1,500 V AC (input-output)

• Operating Temperature: -25°C to +70°C

• Dimensions (H x W x D): 238.5 mm × 162 mm × 72 mm

• Weight: Approx. 2.35 kg

• Mounting: 35 mm DIN Rail

Core Features

• Integrated Power and Safety: Combines a 200 W, 5 V DC power supply with a dual-channel safety relay, eliminating the need for separate components and saving valuable cabinet space .

• High-Power 5 V Supply: Delivers a robust 40 A at 5 V DC, specifically designed to power the logic circuits of PLCs, I/O modules, and other critical control devices .

• Certified Functional Safety: The integrated safety relay is certified to SIL 2 / PL d, making it suitable for building safety circuits up to Category 4 / PL e, as defined by ISO 13849-1 .

• Ultra-Fast Safety Response: Provides a hardware-level safety reaction time of ≤20 ms, which is significantly faster than conventional relay solutions, meeting the demanding safety requirements of high-speed machinery and robotic applications .

• Comprehensive Protection: Features built-in overvoltage, overcurrent, and short-circuit protection on the power supply side, ensuring the safety of connected equipment and the system itself .

• Intelligent Diagnostics: An integrated MCU continuously monitors critical parameters such as coil resistance and contact temperature. Status is communicated via front-panel LEDs and Modbus fault codes, with support for OPC UA cloud alarms, enabling rapid fault localization .

• Hot-Swappable Design: Supports hot-swapping, allowing the module to be replaced without shutting down the control system. The new module automatically inherits parameters for zero-configuration startup, minimizing downtime .

• Rugged Industrial Construction: Engineered for extreme environments with a wide operating temperature range (-25°C to +70°C), 4 kV EFT immunity, and a high Mean Time Between Failures (MTBF) of over 300,000 hours .

Typical Applications

• Providing logic power and safety monitoring for robotic work cells, integrating with safety mats and light curtains for personnel protection .

• Powering PLCs, sensors, and HMIs in high-speed packaging lines, with the safety relay instantly cutting servo drive enable signals when a safety gate is opened .

• Serving as a distributed 5 V power supply in data center UPS systems, with safety contacts interfacing with fire suppression systems for controlled emergency shutdown .

• General use in industrial automation for robot control, production line automation, and process control systems .