WhatsApp: +86 16626708626
Email: 
Phone: +86 16626708626Description
Key Technical Specifications
- Manufacturer: ABB
- Model: DI801
- Ordering code: 3BSE020508R1
- Product type: Digital input module
- Signal specification: 24 V DC
- Number of channels: 16
- Input voltage range: 18 to 30 V DC
- Input current: 6 mA at 24 V
- Input type: Current sinking
- Isolation: One isolated group of 16 channels
- Voltage supervision: Channel 16 can be used for supervision
- Power dissipation: Typ. 2.2 W
- Current consumption: 70 mA at +5 V Modulebus
- Operating temperature: 0 to +55 °C
- Storage temperature: -40 to +70 °C
- Dimensions: 86.1 mm W x 58.5 mm D x 110 mm H
- Weight: 0.24 kg
Product Introduction
ABB DI801 3BSE020508R1 is a 16-channel 24 V DC digital input module for ABB S800 I/O systems. It reads discrete field signals from sensors, switches, and contact devices and brings them into the controller through a group-isolated input stage.
This module is a standard fit when you need compact, current-sinking DI capacity with front-channel status indication and simple S800 integration. The main things to verify are input voltage range, channel mapping, and the exact S800 carrier or termination arrangement before installation.
- DI801
- DI801
Troubleshooting Quick Reference
| Symptom | Possible Cause | Relevance to This Part | Quick Check Method | Recommendation |
|---|---|---|---|---|
| No channel LEDs on | Missing Modulebus power or module not seated | ✅ High | Measure rack/backplane supply and reseat the module | Check power and seating before replacing the card |
| One input stuck ON | Field wire shorted to 24 V or incorrect wiring | ✅ High | Measure voltage at the input terminal with a multimeter | Inspect field wiring and device contacts |
| One input never turns ON | Sensor failure, broken wire, or low input voltage | ✅ High | Measure 18 to 30 V DC at the terminal under load | Verify the field device and wiring path |
| Several inputs fail together | Shared common/return fault | ⚠️ Medium | Check common return wiring and shared supply path | Fix the field common before condemning the module |
| Inputs chatter or flicker | Noise, contact bounce, or filtering issue | ✅ High | Watch the input LED and check the signal with a scope | Improve wiring practice or add filtering upstream |
| Supervision alarm on channel 16 | Voltage supervision wiring issue | ✅ High | Check the supervision input and field supply presence | Correct the supervision wiring and test again |
If the fault is still unclear, contact technical support with photos, wiring details, and diagnostic logs.
Frequently Asked Questions
Q: Is DI801 a 24 V DC module?
A: Yes. DI801 is a 24 V DC digital input module with an input range of 18 to 30 V DC.
Q: How many inputs does it have?
A: It has 16 digital input channels in one isolated group.
Q: Does DI801 support voltage supervision?
A: Yes. Channel 16 can be used for voltage supervision in the group.
Q: Is it sink or source type?
A: It is a current-sinking input module, so the field wiring has to match that scheme.
Q: Is this a hot-swap part?
A: Do not assume hot-swap capability. For ABB S800 I/O hardware, follow the OEM replacement procedure and power-down rules for your specific cabinet.
Q: What condition should I expect on the surplus market?
A: The honest labels are New Original, New Surplus, or Refurbished (tested). If the listing is vague, ask for label photos and test evidence.
Q: What usually causes false “module failure” calls?
A: Bad field wiring, missing 24 V DC, wrong common wiring, and supervision mistakes are the usual culprits. I would verify those first before replacing the module.
