Description
General Information
表格
| Item | Specification |
|---|---|
| Part Number | DAPU100, 3ASC25H204 |
| Manufacturer | ABB |
| Product Family | ASTAT Soft‑starter Control System |
| Product Type | Field I/O Processing Unit Board |
| Installation | Plug‑in eurocard board for ASTAT soft‑starter rack |
| Power Supply | 24 VDC auxiliary power supply |
| Lifecycle Status | Obsolete / End‑of‑Life. OEM manufacturing discontinued. Only new‑old‑stock, refurbished and field‑pulled used maintenance spare parts available; no brand‑new factory‑built units can be ordered. |
| ESD Handling Requirement | Signal acquisition and I/O electronic assembly; anti‑static wrist‑strap and anti‑static workstation required for installation and replacement operations. |
Electrical & Interface Specifications
- DDCS Fiber‑Optic Interface: Optical channel for high‑speed isolated communication with DAPC100 main control processor board.
- Field Signal Terminals: Multi‑channel galvanically isolated digital inputs, digital relay outputs, analog input channels for motor and process measuring signals.
- Backplane Interface: Gold‑plated eurocard edge connector for rack power supply and auxiliary signal interconnection.
- Signal Types: Motor thermal protection inputs, external start‑stop interlock signals, status relay outputs, analog measurement reference signals.
- On‑Board Circuitry: Signal conditioning circuit, opto‑coupler isolation circuit, relay drive circuit, status LED indicators.
- Power Consumption: Typical 7‑10 W.
- Operation Limitation: Cannot operate standalone. Must work with DAPC100 main processor board inside ASTAT soft‑starter rack. It collects field signals and executes output actions according to commands sent by DAPC100.
- Compatibility Matrix
‑ Compatible System: ABB ASTAT soft‑starter control rack
‑ Matching Module: DAPC100 (3ASC25H203) main digital control processor board
‑ Hot‑swap: Not supported; rack power shall be fully cut off before module replacement.
Environmental Specifications
表格
| Item | Value |
|---|---|
| Operating Temperature | ‑20 °C ~ +60 °C inside soft‑starter cabinet |
| Storage / Transport Temperature | ‑40 °C ~ +85 °C for long‑term spare‑part preservation |
| Relative Humidity | 5 %‑95 % RH, non‑condensing; avoid condensation to prevent circuit corrosion. |
| Compliance Standard | CE certification for industrial automation environment, complies with EMC industrial standards. |
| Protection Class | IP00 printed‑circuit assembly; installed inside protected cabinet. |
| Dimension | Standard eurocard plug‑in form‑factor |
| Net Weight | Approx. 0.34 kg |
| Conformal Coating | Conformal‑coated variant available for corrosive and high‑humidity industrial environments. |
| Vibration Resistance | Complies with IEC 60068‑2‑6 industrial cabinet vibration criteria. |
Main Functions
- DAPU100 (3ASC25H204) is the field I/O processing eurocard board for ABB ASTAT soft‑starter system. It serves as physical signal interface between DAPC100 main controller and on‑site field devices.
- Collects external binary interlock signals, motor thermal sensor signals and analog reference signals; transmits these field data to DAPC100 main control board via isolated DDCS fiber‑optic link.
- Receives control commands from DAPC100, drives relay outputs for soft‑starter running status indication, fault alarm and external interlock actions. All field channels adopt galvanic isolation to suppress industrial site electromagnetic interference.
- Front‑panel LED indicators show channel status and board operating condition for on‑site inspection and fault location.
- Typical field failure symptoms
‑ Loss of DDCS optical communication with DAPC100 main board
‑ Field input signal cannot be detected by controller
‑ Relay output no‑action when receiving command
‑ Intermittent signal dropout during soft‑starter running
Common root causes: 24 VDC power supply abnormality, optical fiber damage, field over‑voltage surge damage input channels, backplane connector poor contact, dust and moisture contamination on circuit board.
- Pure maintenance‑oriented spare‑part component, only for repair and replacement of existing legacy ASTAT soft‑starter installations; not suitable for new‑project engineering deployment.
Typical Applications
- Spare‑part replacement for DAPU100 field I/O processing board inside ABB ASTAT soft‑starter rack.
- Troubleshooting scenarios: field signal acquisition failure, relay output abnormal, optical communication breakdown between I/O unit and main processor.
- Preventive‑maintenance spare‑part inventory for water‑treatment, cement, mining, chemical plants equipped with ASTAT soft‑starter units.
- Hardware refurbishment for decommissioned ASTAT soft‑starter assemblies.
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