ABB SACO 64D-Ba SACO-16D2

1. Product Overview

The ABB SACO 64D4 is a microprocessor-based digital alarm unit, belonging to the secondary equipment integrated system of the ABB SPACOM series. Designed specifically for power distribution networks, it is deployed to monitor alarm and signal contacts in power plants, substations, and industrial process facilities.

The SACO 16D2 (including SACO 16D1 and other derivative models) is the matching alarm module unit with 16 channels per module. The SACO 64D4 unit integrates four sets of 16-channel alarm modules and one power supply module as its core configuration.

2. Main Technical Parameters

2.1 Electrical Parameters

Item	Specification
Field Contact Power Supply	48V DC (generated and monitored by the device)
Auxiliary Power Supply 1	19-70V DC or 80-256V AC/DC
Auxiliary Power Supply 2	80-265V AC/DC
Standard Output Relays	16 units (14 grouped alarm relays + 1 buzzer relay + 1 self-monitoring system relay)
Expansion Configuration	Supports up to 128 output relays via SACO 128R4 expansion module

2.2 Channel Parameters

Item	Specification
Delay Setting Gears	8 preset gears: 5ms, 20ms, 100ms, 1s, 5s, 20s, 60s, 160s; customizable via serial port programming
Reset Delay	Independent of input delay configuration
Contact Type	NO (Normally Open), NC (Normally Closed), non-return NO/NC, dual contact (NO+NC) optional
Event Recording Resolution	Better than 10 milliseconds

2.3 Environmental & Protection Parameters

Item	Specification
Operating Temperature	-20℃ to +60℃
Ingress Protection Rating	IP20
EMC Standard	IEC 61000-4

3. Product Features

• Microprocessor-based Design: Equipped with intelligent processing capability to realize complex monitoring functions for power system operation.
• Self-monitoring System: Built-in hardware and software self-inspection mechanisms to ensure maximum operational reliability of the equipment.
• Multi-channel Monitoring: Supports multiple independent alarm channels with individually adjustable delay time for each channel.
• Dual Visual & Audible Alarm: Adopts dual alarm modes with indicator lights and buzzer for intuitive and effective fault reminder.
• Modular Structure: Capable of independent operation or combined assembly, facilitating system expansion, daily maintenance and equipment replacement.
• Diversified Communication Interfaces: Compatible with optical fiber and electrical data bus connection modes to adapt to different system networking scenarios.
• Remote Configuration Function: Supports remote parameter setting, module grouping and expansion interface configuration to improve operation efficiency.

4. Structure and Composition

In accordance with official technical documents, the structural components of the SACO 64D4 are as follows:

• Alarm Modules: The unit is equipped with 4 independent 16-channel alarm modules as the core signal acquisition and alarm components.
• Power Supply Module: Provides stable and continuous power supply for the entire device unit.
• Connection Module: Includes SPA-ZC2 interface module and other matching connection accessories for system docking.
• Front Panel Display: Adopts 4-digit clear display to realize first-level alarm indication and real-time status display.
• Expansion Interface: Reserved dedicated interface for connecting SACO 128R4 relay expansion module to expand output channels.

5. Application Fields

The SACO series alarm units are widely applicable to the following scenarios:

• Power Plants: Real-time monitoring of various alarm signals and contact states in power plant monitoring systems.
• Substations: Power distribution monitoring and equipment protection signal monitoring for power transmission and transformation systems.
• Industrial Process Facilities: Real-time signal monitoring and fault alarm for industrial automated production processes.
• Marine & Offshore Applications: Stable and reliable operation adaption in harsh marine and offshore working environments.
• Distributed Systems: Seamlessly integrated into sequence of event recording and signal monitoring systems for distributed power systems.

6. Installation and Maintenance Guidelines

6.1 Installation Instructions

• The SACO 64D4 can be used as a standalone unit or combined with multiple SACO 64D4 sub-racks for integrated system deployment.
• For installation in the SPACOM series cabinet, a 1U height space (approximately 44mm) is recommended for reserved installation clearance.
• Supports optical fiber bus connection to build a complete system integrating equipment monitoring, sequence of event recording and data acquisition functions.

6.2 Maintenance Key Points

• Regular daily status inspection by utilizing the built-in self-test function of the unit to ensure normal equipment operation.
• The unit can quickly identify system faults and trigger alarm prompts once abnormal operating conditions occur.
• Fault analysis can be carried out after alarm channel triggering, assisting maintenance personnel in formulating targeted corrective and maintenance measures.

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