ABB SACO16D1 Digital Annunciator Unit
ABB SACO16D1 Digital Annunciator Unit
Channel Configuration
16 contact-operated on/off alarm or pulse counting channels, compatible with normally open (NO) and normally closed (NC) field contacts.
4 auxiliary output relays, including 2 user-configurable group alarm reflash relays, 1 audible device control relay, and 1 self-supervision function relay.
Alarm Indication & Event Recording
First-out alarm indication via a 4-digit seven-segment display, showing the first activated alarm channel with the prefix "A".
Dual event registers: a local register storing the latest 9 events (readable via front-panel buttons) and a serial communication register holding 50 timestamped events (for higher-level system retrieval).
Super-bright LED indicators for visual alarm notification, with customizable indication sequences per channel.
Programmability & Flexibility
Fully field-programmable via front-panel push-buttons or serial communication (e.g., SMS 010 software).
Configurable parameters include channel input/reset delay (5 ms to 160 s), contact type, pulse counting mode, alarm sequence, and interlocking logic.
5 standardized operational sequences available, supporting automatic/manual reset and visual ringback functions.
Communication Capability
Equipped with an RS485 serial communication port compliant with the SPA bus protocol, enabling seamless connection to upper-level systems (e.g., SRIO 500M/1000M data collectors).
Supports remote operations: alarm acknowledge/reset, audible device silencing, parameter reading/writing, and unit testing.
Synchronizable blinking sequences for multiple interconnected units.
Self-supervision & Reliability
Sophisticated self-supervision system monitoring internal voltages, program execution, and microprocessor logic, with hardware and software watchdog functions.
Fault indication via the "FAULT" LED and self-supervision relay action; fault codes displayed on the digital screen for troubleshooting.
Pumping supervision function to prevent communication blockage caused by frequent contact state changes.
Module Composition
The unit consists of plug-in Euro-card modules: power supply module (SPGU 240A1/SPGU 48B2), I/O module (SWIM 2A1), alarm annunciator module (SWPM 3A1), and connection module (SWCM 3A1).
Mounting & Protection
Flush mounting design, with optional raising frames (40 mm/80 mm/120 mm) to reduce panel depth.
Cast aluminum alloy enclosure with a UV-stabilized polycarbonate lid, providing IP54 protection against dust and water ingress.
Wiring Convenience
Screw terminal blocks on the rear panel, accommodating 1-2 conductors of up to 2.5 mm² without terminal lugs.
Clear connection diagrams affixed to the unit for easy wiring.
Alarm Channel Functions
7 input signal types supported, including edge-triggered signals and pulse counting modes (counting up to 3 Hz, with a 0-29999 counting range).
Each channel features 2 interlocking signal inputs and 1 interlocking signal output, supporting up to 8 interlocking levels for complex logic control.
Group Alarm Reflash Outputs
4 reflash modes available for group relays: Field Contact Following Reflash (FCFR), Acknowledge Action Controlled Reflash (AACR), Impulse Shaping Reflash (ISR), and combined modes.
Audible Alarm Control
Audible device activation upon alarm triggering, with silencing via local/remote buttons. Optional audible ringback when alarms return to normal (configurable per channel).
Power Supply
Auxiliary power input: 80-265 V AC/DC (SPGU 240A1) or 18-80 V DC (SPGU 48B2).
Internally generated 48 V DC field contact voltage with galvanic isolation from electronic circuits.
Environmental Performance
Operating temperature range: -10°C to +55°C; storage temperature range: -40°C to +70°C.
Dielectric test voltage: 2 kV at 50 Hz for 1 minute, meeting IEC 255-5 standards.
Weight: 3.1 kg.
Contact Ratings
Output relay contacts rated at 3 A/250 V AC, with DC breaking capacity dependent on voltage levels.
Electric power plants and substations
Industrial plants and process control systems
Marine vessels and offshore installations
Building technical installations
Water treatment plants
The unit is practically maintenance-free under normal operating conditions; visual inspection is recommended in harsh environments.
LED and self-supervision function testing can be performed via the front-panel acknowledge/reset button.
Spare parts include core modules (SWPM 3A1, SWIM 2A1), power supply modules, bus connection modules, and raising frames.
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