Description
ABB DI620 3BHT300002R1 32 Channel Digital Input Module, Advant OCS S800 I/O Digital Input Card, Industrial DCS Spare Part
Product Application
DI620 is a 32-channel digital input module for ABB Advant OCS and S800 I/O system. It collects 24VDC discrete on/off signals from field switches, limit switches, relay contacts, proximity sensors and equipment status feedback, then transmits digital status data to AC800M controller via ModuleBus. It is widely used for equipment status monitoring, interlock signal collection and safety status feedback in process plants.
- Thermal power plant DCS equipment status & interlock signal acquisition
- Petrochemical plant valve position, pump and motor running status monitoring
- Pulp & paper mill machine safety interlock signal collection
- Metallurgy furnace and rolling mill discrete signal input
- Water & wastewater treatment plant field switch signal reading
- Legacy ABB Advant OCS / S800 I/O system spare replacement and retrofit
- Redundant control system discrete signal input for safety interlock logic

DI620
Specifications
- Part Number: DI620, 3BHT300002R1
- Brand: ABB
- Product Type: 32 Channel Digital Input Module
- Compatible System: ABB Advant OCS, AC800M, S800 I/O
- Mounting: Plug-in module on S800 I/O base unit
- Dimension: 252 × 273 × 40 mm
- Weight: Approx. 1.17 kg
- Input Signal: 24VDC digital input
- Number of Channels: 32
- Protection Class: IP20 (cabinet installation only)
- Condition: Original new / refurbished spare available
- Compliance: CE, IEC industrial control standard
Parameters
- Communication Protocol: ModuleBus
- Input Type: Sink / source configurable
- Channel Isolation: Group isolation
- Operating Temperature: 0°C ~ +55°C
- Storage Temperature: -40°C ~ +85°C
- Relative Humidity: 5%~95% RH, non-condensing
- Shock & Vibration: Comply with IEC 60068 industrial vibration standard
- Status Indicator: Front LED indicators for power, ModuleBus communication and per-channel signal status
- Diagnostic: Module hardware fault, bus communication fault detection
Key Features
- 32-channel high-density digital input module for S800 I/O Advant OCS system
- Supports 24VDC field discrete signals, sink/source input mode configurable
- Group isolation design to reduce interference between field channels
- Supports hot-swap replacement under safe operating procedure without system shutdown
- Individual channel LED status indication for fast on-site troubleshooting
- ModuleBus high-speed communication with AC800M controller for real-time status upload
- Compact high-density design to save cabinet space for large quantity DI signal applications
- Discontinued legacy ABB I/O spare, critical replacement card for existing Advant OCS installations

ABB Same Series Related Models (≥6)
- DI620 3BHT300002R1
- DO620
- AI620
- AO620
- DI810
- DO810
- AI830A
Maintenance
- Routine inspection: Check LED status, base unit contact and field 24VDC wiring terminals every 6–12 months
- Clean module surface with dry compressed air; liquid solvent cleaning is strictly prohibited
- ESD protection must be adopted during disassembly, anti-static wristband required
- If channel status abnormal or ModuleBus communication loss occurs, power off and check field wiring and base terminal connection
- Do not energize the module if PCB corrosion, burn marks or condensation are found
- We support function testing, refurbishment and spare replacement service for this DI620 digital input module
Installation
- Hot-swap replacement can be performed following safety procedure or cut off cabinet 24VDC power supply before replacement, implement lockout-tagout procedure.
- Wear anti-static wristband to prevent electrostatic damage to input circuit.
- Insert DI620 module into designated base unit slot and lock the fastening latch.
- Connect field 24VDC discrete signal wires to base terminals, properly ground cable shielding.
- Configure channel input type via Compact Control Builder software.
- Check all wiring and confirm no loose connections.
- Restore power supply, verify ModuleBus communication and channel LED status.
- Trigger field switches one by one, verify digital status feedback on controller and complete commissioning.


