Excellent PLC
| Company Information | ||||||||
| [email protected] | ||||||||
| Mobile | +8613666084105 | |||||||
| +8613666084105 | ||||||||
| 13666084105 | ||||||||
| Add | Room 1004, No. 62 Xiangxiu Li, Siming District, Xiamen City, Fujian Province, China | |||||||
Product Introduction
The ABB DI621 (Part Number: 3BHT300012R1) is a high-performance Digital Input Module developed as part of ABB’s Advant Controller 410/450 system platform. This industrial-grade module is purpose-built for demanding process automation tasks, offering reliable acquisition of binary input signals in real-time control environments.
With 32 opto-isolated input channels, the DI621 provides higher input density than earlier modules, minimizing panel space while maximizing functionality. It is designed to operate in harsh industrial conditions—making it suitable for a wide array of applications, from energy and utilities to oil & gas, chemical processing, and discrete manufacturing. Each input is protected, isolated, and monitored for robust signal integrity and safe operation.
As a native module in the Advant OCS family, the DI621 integrates seamlessly with ABB’s legacy and modern DCS infrastructures, supporting reliable field signal acquisition and contributing to the long-term success of mission-critical systems.
Technical Specifications
| Parameter | Specification |
|---|---|
| Product Name | DI621 Digital Input Module |
| Part Number | 3BHT300012R1 |
| Input Channels | 32 Digital Inputs (opto-isolated) |
| Nominal Input Voltage | 24 V DC |
| Input Voltage Range | 18 V to 30 V DC |
| Input Type | Discrete / Binary |
| Input Current | Approx. 6–8 mA per channel at 24 V DC |
| Isolation | Optical isolation between input and logic circuits |
| Response Time | < 10 ms typical |
| Status Indication | Channel status LED per group |
| Wiring Method | Screw terminals |
| Backplane Communication | Advant Fieldbus 100 |
| Redundancy | Supported (system dependent) |
| Power Supply | Supplied via I/O rack backplane |
| Protection | Overvoltage and reverse polarity protection |
| Certifications | CE, UL, CSA, RoHS |
| Environmental Protection | IP20 |
| Operating Temperature | 0°C to +60°C |
| Storage Temperature | -40°C to +70°C |
| Humidity Tolerance | 5% to 95% non-condensing |
| Mounting Method | DIN rail / rack mount |
| Dimensions (W x H x D) | 252 x 273 x 40 mm |
| Weight | 1.17 kg |
| System Compatibility | Advant Controller 410/450, Symphony DCI System Six |
Applications
-
Power Generation Facilities: For acquiring binary signals from turbine systems, breaker positions, and auxiliary relays.
-
Oil & Gas Refineries: Monitors critical field devices like limit switches, pressure trip contacts, and shutdown logic inputs.
-
Chemical and Pharmaceutical Plants: Interfaces with control logic elements for batch control, safety interlocks, and alarms.
-
Water and Wastewater Treatment: Detects valve open/close status, flow switch states, and control system feedback signals.
-
Steel & Metal Processing: Inputs from heavy-duty push buttons, safety doors, emergency stops, and more.
-
Automotive & Assembly Lines: For real-time position detection, tool status, and conveyor belt tracking.
-
Building Automation & Infrastructure: Integration with fire alarms, security systems, and monitoring contacts.
Key Advantages
-
High-Density Input: 32 inputs in a compact module reduces space and cabling complexity.
-
Robust Isolation: Optical channel isolation enhances system safety and reliability.
-
Field-Proven Platform: Trusted by industry leaders for over two decades in continuous operation.
-
Modular Architecture: Easily replaced or upgraded in modular DCS environments.
-
Direct Integration: Seamlessly connects with ABB’s Advant and Symphony platforms.
-
Clear Diagnostics: LED indicators and system tools assist in efficient troubleshooting.
-
Durability & Ruggedness: Withstands temperature extremes, vibration, and electrical noise.
-
Extended Lifecycle Support: Long-term availability of spares and engineering documentation from ABB.
Latest News Headlines
-
ABB Launches Extended Support Program for DI621 and Advant Modules
-
ABB DI621 Enhances Plant Reliability in Middle East Petrochemical Projects
-
New ABB Retrofit Kits Offer Simple Upgrade Path for DI621 Modules
-
DI621 Module Surpasses 25 Years of Operational Reliability in Utility Sector
-
ABB Confirms CE and UL Recertification for Legacy DI Modules
-
ABB DI Modules Now Part of Lifecycle Optimization Suite in Symphony Plus
-
User Success Story: DI621 Drives Reliability in Chemical Plant Automation
-
ABB Unveils Diagnostic Firmware Enhancements for DI621 Series
-
Smart Maintenance Kits Introduced for DI610/DI620/DI621 Family
-
DI621 Shows Resilience in Arctic Oil Platform Control System
Frequently Asked Questions (FAQ)
-
What is the difference between DI621 and DI610?
DI621 has 32 input channels versus 16 in DI610, offering higher density in the same module format. -
Can DI621 be used in redundant configurations?
Yes, when integrated with redundancy-enabled Advant DCS architectures. -
Are input channels isolated from each other?
Each input is opto-isolated from the logic side but not from other inputs. -
Is DI621 compatible with Symphony Plus?
It is used in legacy Symphony DCI systems and is often part of migration to Symphony Plus. -
Can I replace DI610 with DI621 directly?
Electrical compatibility exists, but wiring and software changes are required due to different channel count. -
What wiring method is used for field connections?
Screw-type terminal blocks are standard for robust field wiring. -
How much does the module weigh?
The Module weight is 1.17 kg. -
Is firmware upgradeable?
No direct firmware upgrades are available. However, diagnostics are system-level and periodically updated. -
Can it be used in marine or offshore applications?
Yes, provided it is housed in certified enclosures with vibration and corrosion protection. -
What tools are used to monitor or diagnose DI621?
ABB’s Advant Engineering Tools and DCI System software are typically used for diagnostics.
Related Models from the Same Family or Function
| Model | Description | Channels | Voltage | System Compatibility |
|---|---|---|---|---|
| DI610 3BHT300004R1 | Digital Input Module (Low Density) | 16 DI | 24 V DC | Advant Controller 410/450 |
| DI620 3BHT300002R1 | Mid-Density Digital Input Module | 16 DI | 24 V DC | Advant Controller |
| DO610 3BHT300006R1 | Digital Output Module | 16 DO | 24 V DC | Advant Controller |
| AI610 3BHT300000R1 | Analog Input Module | 8 AI | 0-20 mA | Advant Controller |
| AO610 3BHT300003R1 | Analog Output Module | 8 AO | 0-20 mA | Advant Controller |
| DI810 3BSE008508R1 | S800 I/O Digital Input Module | 16 DI | 24 V DC | 800xA / S800 I/O |
| TU810V1 3BSE013231R1 | Terminal Unit for DI Modules | 14 DO | 24 V DC | S800 I/O |
| IMDSO14 | Symphony Digital Output Module | 14 DO | 24 V DC | Symphony Harmony / INFI 90 |
Popular ABB Automation Models
| Model | Description | Product Type | Typical Use |
|---|---|---|---|
| PM864AK01 | High-Speed CPU Module | Controller CPU | 800xA / Freelance DCS |
| CI854AK01 | PROFIBUS-DP Communication Module | Fieldbus Interface | Remote I/O Communication |
| AI810 3BSE008516R1 | Analog Input Module | I/O Module | Analog Signal Acquisition |
| DO820 3BSE008512R1 | Digital Output Module | I/O Module | Discrete Control |
| CP600 Series | HMI Operator Panel | Human-Machine Interface | Visualization and Control |
| TU849 3BSE042560R1 | Compact Terminal Unit | Base Unit | For I/O Module Installation |
| AC800M PM865 | Redundant CPU Unit | Controller CPU | High Availability Applications |
| CI860 3BSE032444R1 | MB300 Interface for Harmony Integration | Communication Module | Legacy DCS Migration |
