Description

SACO16D1-AA 16-Channel Digital Alarm Annunciator Unit

Technical Specifications

• Product Model: SACO16D1-AA
• Brand: ABB
• Warranty: One Year
• Input Voltage: 24 VDC / 48 VDC auxiliary power supply
• Operating Temperature: -20°C to +60°C
• Storage Temperature: -40°C to +85°C
• Response Time: ≤ 20 ms alarm scanning and trigger response
• Protection Class: IP54 when panel flush mounted, IP20 rear wiring compartment
• Accuracy Class: N/A (digital status monitoring device)
• Output Frequency: 50/60 Hz grid compatible
• Rated Current Range: Max 0.15 A total power consumption
• Communication Interface: RS485 SPA bus, fiber-optic cascade bus
• Supported Protocols: ABB SPA proprietary bus protocol
• Overload Capacity: Built-in overvoltage, reverse polarity and EMC surge protection for each input channel
• Dimensions: 144 mm × 144 mm × 110 mm (panel cutout standard square size)
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Product Overview

The SACO16D1-AA is a programmable 16-channel digital alarm annunciator unit designed for secondary system supervision in power substations, thermal power plants, offshore platforms and marine electrical installations. It continuously monitors potential-free NO/NC dry contacts from protection relays, circuit breakers, transformer temperature sensors and process interlock switches, triggering visual LED indications and collective audible buzzers once abnormal states occur. This equipment addresses critical operational pain points including scattered alarm signals, difficulty identifying the root first-fault event during system disturbances, incomplete event sequence recording and slow manual troubleshooting in complex power distribution systems. Its dedicated first-out alarm lock function highlights the initial triggering channel on the front 4-digit display, avoiding misjudgment caused by cascaded secondary faults during short-circuit or equipment tripping incidents. Substation control technicians, power plant automation supervisors, electrical commissioning engineers and marine vessel electrical officers gain substantial efficiency gains from its standalone operation mode and multi-unit fiber-optic networking capability.