Overview
Configured for safety digital signal acquisition in the AC500-S safety PLC platform, the ABB DI581-S 1SAP284000R0001 (DI581-S Safety Digital Input Module) provides direct electrical processing of 24 VDC field input signals. The module supports 16 safe digital inputs, operation up to SIL2 with 16 channels or SIL3 with 8 channels, and incorporates 8 integrated test pulse outputs for safety circuit monitoring and diagnostics.
Suffix Breakdown & Model Matrix
The supplied documentation identifies a single fixed catalog number:
| Model Variant | Description |
|---|---|
| DI581-S / 1SAP284000R0001 | Safety digital input module, 16 SDI, 24 VDC, 1-wire, 8 pulse outputs |
No official suffix subdivision or ordering matrix is specified within the referenced product documentation.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | DI581-S |
| Brand | ABB |
| Origin | Sweden |
| Product Series | AC500-S / S500-S Safety I/O |
| Product Type | Safety Digital Input Module |
| Digital Inputs | 16 safe digital inputs |
| Safety Capability | 16 SDI SIL2 or 8 SDI SIL3 |
| Input Voltage Type | DC |
| Input Voltage Range | 0 to 30 VDC |
| Nominal Signal Voltage | 24 VDC |
| Input Current | 7 mA |
| Pulse Outputs | 8 |
| Wiring Method | 1-wire |
| Delay Time | 1 to 500 ms |
| Protection Rating | IP20 |
| Weight | 0.122 kg |
| Dimensions | 67.5 x 76 x 62 mm |
| Operating Temp | Not explicitly specified in the referenced documentation |
| Power Consumption | Not explicitly specified in the referenced documentation |
Profinet and Backplane Communication Integration
The DI581-S exchanges process and diagnostic information through the AC500-S safety I/O infrastructure using the system I/O bus. The module incorporates two rotary switches for PROFIsafe address assignment and provides dedicated status indication for process voltage, channel state, and module diagnostics. Eight phase-shifted test pulse outputs are available for line monitoring and safety input validation. The design supports deterministic safety data transfer between the field wiring layer and the AC500-S controller environment.
Frequently Asked Questions
Q: Does the DI581-S support SIL3 applications on all 16 input channels?
A: No. The module supports 16 safe digital inputs for SIL2 applications or 8 safe digital inputs configured for SIL3 applications according to the product specification.
Q: Are diagnostic test pulse outputs integrated into the module?
A: Yes. The DI581-S provides 8 pulse outputs used for safety input supervision, line fault detection, and diagnostic functions.
Q: Can input filtering be configured?
A: The module supports configurable delay times from 1 ms to 500 ms, allowing adaptation to field device response characteristics and signal conditioning requirements.
Field Installation Guidelines
- Mount the module on the designated AC500-S safety I/O terminal unit according to ABB installation procedures.
- Verify process voltage polarity before energizing the module.
- Route safety input wiring separately from high-current power conductors to minimize induced interference.
- Connect cable shields according to the plant grounding concept and applicable safety regulations.
- Utilize the integrated pulse outputs when implementing line monitoring or short-circuit detection circuits.
- Confirm PROFIsafe address settings through the front rotary switches before commissioning.
- Verify LED status indicators for process voltage, channel state, and diagnostic conditions during startup and maintenance.
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