DSSA165 48990001-LY

Brand: ABB
Description: Power Supply Unit
Condition: Brand New
Certificate: COO TEST REPORT WARRANTY LETTER
Warranty: 1 year
Inventory Qty: 8
Payment Term: T/T
Shipping Port: Xiamen
ABB DSSA165 48990001-LY is an industrial-grade 24VDC/25A high-power power supply unit for the ABB Advant Master DCS. It provides stable, isolated DC power to the controller, I/O modules, and field instruments, and is a critical infrastructure component of the system.

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Product Description

Manufacture	ABB
Model Number	DSSA165
Ordering Number	48990001-LY
Catalog	Power supply
Country Of Origin	Sweden
RoHS compliance	Following EU Directive 2011/65/EU
Dimension	23.85cm7.4cm16.2cm
HS Code	853890
Weight	26 kg

Product Overview

ABB DSSA165 48990001-LY is a dedicated industrial isolating switch power supply for ABB Advant Master DCS. It mainly provides stable DC power for DCS cabinet controllers, I/O cards and field two-wire instruments, and is widely used in power and chemical automatic control cabinets. DSSA165 48990001-LY adopts the principle of isolated AC-DC conversion with PFC correction: after EMI anti-interference filtering and bridge rectification, it is converted to high-voltage DC, then through high-frequency inversion and electrical isolation of the transformer, and finally through secondary rectification to stabilize the output DC voltage. The output voltage is stabilized through closed-loop feedback to resist grid fluctuations. On-site, the rack is installed in a fixed manner. After wiring is completed and no short circuit is checked, power is directly applied. The equipment automatically self-checks, and if the power indicator light remains on constantly, it indicates normal operation. It uses natural air cooling and does not require a cooling fan. This power supply supports a wide AC input range of 85-264VAC, with a conversion efficiency exceeding 90%. It features self-locking protection against overvoltage, undervoltage, overcurrent, short circuit and over-temperature, and has strong electromagnetic interference resistance. The operating temperature range is -20 ℃ to 60℃. It comes with passive alarm contacts and can be connected to DCS for remote fault transmission. It has excellent operational stability.

Operating principle

In essence, DSSA165 48990001-LY operating principle is an AC-DC isolated voltage stabilizing power supply that supplies power to the DCS control layer.

1. Input and EMI filtering: 120/220/230 VAC enters and first passes through an EMI filter to suppress grid spikes, surges and high-frequency interference, protecting the subsequent circuit.

2. Rectification and PFC correction: Full-bridge rectification converts AC to high-voltage DC; Power factor correction (PFC) brings the power factor close to 1, reducing harmonic losses and enhancing energy efficiency. High-frequency inversion and isolation: High-voltage DC is converted into high-frequency AC through high-frequency switching tubes IGBT/MOSFET, and electrical isolation against ground circulating current and interference is achieved through high-frequency transformers.

3. Rectification and filtering output: The secondary high-frequency AC of the transformer is rectified by Schottky and smoothed and filtered by LC, outperforming a low-ripple 24VDC.

4. Closed-loop voltage regulation and protection: The output voltage is sampled and fed back to the PWM controller, which dynamically adjusts the duty cycle to ensure stable output when the load changes. It is equipped with built-in overvoltage, undervoltage, overcurrent, short circuit and over-temperature protection. When a fault occurs, it locks the output and lights up the alarm indicator light

DSSA165 48990001-LY Features

1. High power and high stability: 24VDC / 25A, ±1% voltage regulation accuracy, low ripple, suitable for critical DCS loads.

2. Wide input and high reliability: PFC features a high power factor, high efficiency, and low long-term operating loss.

3. Perfect protection mechanism: Comprehensive protection against overvoltage/undervoltage, overcurrent, short circuit and over-temperature, fault latching and LED indication, facilitating quick location.

4. Electrical isolation and anti-interference: High-frequency transformer isolation design effectively suppresses common-mode interference and is suitable for strong industrial electromagnetic environments.

5. System-level adaptation: Specifically designed for ABB Advant Master, seamlessly integrated with controllers and I/O, supporting unified system monitoring and alarm.

6. Long service life and easy maintenance: Industrial-grade components, natural air cooling, wide temperature range operation from -20 ℃ to +60 ℃; 10-year maintenance package, reducing life cycle costs.