ABB DI801 – Digital Input Module (S800 I/O Series)
Introduction
The ABB DI801 is an industrial-grade 16-channel digital input module designed for ABB AC800M and 800xA distributed control systems. It is part of the S800 I/O platform, widely used in power generation, oil & gas, water treatment, chemical plants, and factory automation. The module converts binary field signals—such as switches, limit sensors, alarm contacts, and status feedback—into reliable logic data for the control system.
Structure & Components
Terminal Block Interface – Pluggable connector for field wiring, supports 2-wire and 3-wire sensors
Opto-Isolated Input Channels – Protects controller from external voltage surges and ground faults
Noise Filter & Debounce Circuitry – Ensures clean signal transition for mechanical switches
Module Backplane Connector – Supplies power and bus communication with the AC800M CPU
Front Status LEDs – Indicates per-channel input state and module health
Technical Specifications (this model uses table format)
| Specification |
Value |
| Number of Digital Inputs |
16 channels |
| Input Voltage Range |
24 VDC nominal |
| Input Type |
Sink/source compatible (depending on wiring method) |
| Isolation |
Channel-to-system optical isolation |
| Input Delay |
Programmable filter time (software configurable) |
| Current Consumption |
From I/O bus, no external supply |
| Operating Temperature |
0°C to +55°C |
| Storage Temperature |
−40°C to +70°C |
| Mounting Base |
TU810 / TU812 or other S800 terminal units |
| Diagnostics |
Module status + channel fault monitoring |
| Approvals |
CE, UL, IEC 61131-2 industrial standard |
Key Features
16 optically isolated channels for improved electrical safety
Designed for 24/7 continuous operation in critical control plants
Software-configurable debounce & filter timing for clean signals
Compatible with dry-contact and NPN/PNP field devices
Hot-swap insert/removal when used with redundant systems
Full support from ABB’s lifecycle service & spare-parts program
Typical Applications
Turbine start/stop status signals
Motor/fan/pump run feedback and protection alarms
Limit switches and end-position sensors in automated machinery
Discrete field instrumentation in refineries & chemical plants
Digital feedback monitoring in SCADA and remote I/O stations
Retrofit/expansion of existing ABB S800 I/O installations
Installation & Maintenance
Installation Steps
Plug the DI801 onto an S800 terminal base (TU8xx series).
Connect field wiring using shielded cable if needed for long runs.
Configure input types & debounce timing via ABB Control Builder.
Power up system and check LED indication for each channel state.
Maintenance Best Practices
Inspect terminal screws yearly for vibration loosening.
Ensure field ground and shield termination to prevent noise interference.
Replace only with original ABB DI801 to maintain isolation safety level.
Keep spare units stored in ESD-safe packaging with controlled humidity.
Additional Notes
DI801 is the standard 24V input module; DI810 and DI820 provide extended diagnostics and higher voltage variants.
Fully compatible with redundant AC800M CPU and HMI alarm/event logging.
Long-term supported under ABB 800xA lifecycle and spare-part roadmap.
Switzerland .jpg)
.jpg)
.jpg)
