We will arrange delivery within 3-5 days after receiving the payment.
Our express delivery: DHL and FedEx.
Quality packing for each product
Destination country all taxes & duty to be paid by buyer
Only part of the brand and model, if you have other product needs, please contact us.
The ABB DI840 is a high-performance, high-density DC digital input (DI) module designed exclusively for ABB’s AC 800M DCS and S800 I/O platform. Engineered for mission-critical industrial applications, it excels at capturing fast, reliable digital signals from field devices (e.g., limit switches, proximity sensors, emergency stops) and transmitting them to the DCS for real-time control and monitoring. Unlike entry-level DI modules (e.g., DI810), it offers enhanced features such as high-speed signal sampling, built-in diagnostics, and broad voltage compatibility—making it ideal for scenarios requiring precision and robustness: power plant turbine control, petrochemical emergency shutdown loops, and high-speed manufacturing lines (e.g., automotive assembly).
- Ultra-Fast Response: <0.1ms response time in high-speed mode enables capture of rapid signals (e.g., encoder pulses for motor speed monitoring, high-frequency machine stop commands)—critical for closed-loop control of fast-moving equipment (e.g., packaging lines).
- Multi-Voltage Compatibility: Selectable 12/24/48V DC input voltage eliminates the need for separate modules for different field device voltages (e.g., 24V DC proximity sensors and 48V DC emergency stops), simplifying inventory and system design.
- Dual Polarity Support: Configurable sinking (NPN) or sourcing (PNP) input per channel via ABB Control Builder M—compatible with all common industrial sensor types (e.g., NPN inductive sensors for metal detection, PNP photoeyes for product counting).
- Adjustable Debounce: 0.1ms~100ms debounce time filters electrical noise from mechanical switches (e.g., limit switches with contact bounce) or electromagnetic interference (EMI) from nearby motors—prevents false signal triggers in noisy industrial environments.
- Channel-Level Diagnostics: Built-in logic monitors each channel for open circuits (e.g., broken sensor cables) or short circuits (e.g., water ingress in field wiring). Faults trigger local LED alarms and send diagnostic data (e.g., "Channel 7: Open Circuit") to the AC 800M controller for remote monitoring.
- Power Supply Monitoring: Detects under-voltage (e.g., 24V DC supply dropping to 18V) or over-voltage (e.g., 48V DC spiking to 60V) conditions—alerts technicians to power issues before they cause signal loss.
- SIL 2 Compliance: Meets IEC 61508 SIL 2 standards for safety-related loops—suitable for critical systems (e.g., petrochemical emergency shutdown valves, power plant turbine interlocks) where failure could lead to safety hazards.
- Reinforced Isolation: Group-level isolation (4 channels per group) prevents cross-faults (e.g., a short in Channel 1 from affecting Channels 5–8) — a key safeguard for large-scale I/O racks with dozens of interconnected signals.
- Power Plant Turbine Control: Captures 16 high-speed DI signals (e.g., turbine bearing temperature switches, emergency stop commands) — <0.1ms response time ensures rapid shutdown if abnormal conditions are detected.
- Automotive Assembly Line: Monitors 16 DI signals (e.g., robotic arm position sensors, conveyor belt photoeyes) — adjustable debounce (2ms) filters noise from assembly line motors, and PNP/NPN compatibility supports diverse sensor types.
- Petrochemical Emergency Shutdown (ESD) Loops: Integrates with TU845 termination units to process 16 DI signals (e.g., flammable gas detector alarms, pressure switch trips) — SIL 2 compliance ensures reliable ESD triggering, and isolation prevents fault propagation.
-
Voltage Configuration:
- Set the input voltage (12/24/48V DC) via hardware jumpers before powering on the module—incorrect voltage settings damage the module or field sensors.
- Ensure the field device voltage matches the module’s configured voltage (e.g., 24V DC sensors with 24V DC module setting).
-
Wiring Guidelines:
- Use shielded twisted-pair cables (0.2–1.5mm²) for field wiring to reduce EMI—ground the shield at one end (preferably at the termination unit) to avoid ground loops.
- For safety loops, use separate cable trays for DI840 wiring and high-voltage cables (e.g., 10kV power cables) to prevent interference.
-
Software Configuration:
- Configure input type (sinking/sourcing) and debounce time via ABB Control Builder M—test signal responsiveness after configuration to verify settings (use ABB TY801/TY804 shunt sticks for non-intrusive testing).
- Enable diagnostic alarms in the DCS to receive real-time fault notifications (e.g., email/SMS alerts for open circuits).
-
Maintenance & Testing:
- Perform quarterly channel tests with a shunt stick (e.g., TY801) to verify signal capture—clean module terminals with a dry brush to remove dust buildup (avoids high resistance).
- Replace the module if LED alarms persist after troubleshooting (e.g., "Power Fault" despite stable 24V DC supply) — do not attempt to repair internal components.
-
Environmental Considerations:
- Mount the DI840 away from heat sources (e.g., power supplies, resistors) in control cabinets—maintain ≥20mm clearance for airflow to prevent overheating.
- In high-humidity environments (e.g., food processing plants), use a cabinet dehumidifier to keep relative humidity <85% (non-condensing) — moisture causes terminal corrosion and isolation failure
The structure and details of the product：
Please make an inquiry for more models
ABB DI810
ABB PM856AK01
ABB PCD232
ABB GFD233
ABB CI854AK01
ABB SCYC51010
ABB CI854AK01
ABB SCYC51010
ABB CI854AK01
ABB YT204001-DT 7.4
ABB YT204001-DL
ABB YPN107A
ABB YT204001-DY
ABB YT204001-DF
ABB YT204001-AN
ABB YT204001-EH
ABB YT204001-DY/2
ABB YT204001-KE
ABB YT204001-BM/3 YPQ104C
ABB YPD103A YT204001-AC/1
ABB YT204001-AC
ABB YT204001-BL
ABB YT204001-OK
ABB YPG106A YT204001-BL/2
ABB YXU173E YT204001-JK
ABB YT204001-DM YPN107A
ABB YT204001-HC
ABB 3BHE014185R0001 UUD148AE01
ABB 3BHE014185R0002 UUD148AE02
ABB YT204001-JL
ABB YT204001-FY
ABB YT204001-CN
ABB YPR104A
ABB YT204001-AA
ABB YT204001-DM
ABB YPN107A YT204001-DF/1
ABB YT204001-FD
ABB YPR104A
ABB YT204001-AD
ABB YXU168E
ABB YT204001AD
ABB YT204001-AA/1 YPM102A
ABB YPQ101A
ABB YPO104A
ABB YPO104A YT204001-BF/1
ABB YPO106A YT204001-EG
ABB yxe152a YT204001-AF
ABB YPG105A
ABB YT204001-JK
ABB YT204001-AF
ABB YT204001-BH
ABB YPQ-103C
ABB YT204001-AM
ABB YXU173E
ABB YT204001-BT
ABB YPC1048
ABB YKI116A
ABB YPP105F
ABB YXU170E
ABB YT204001-EK 7.5
ABB YT204001-HS
ABB M2BAX100LA4
ABB 5STP33L2800
ABB M2BAX160MLA4
ABB YXU172E
ABB YPG-110E
ABB YT204001-JJ
ABB YPH105E
ABB YXU169B
Other best-selling products：
--------------占位---------------
Email Us justwellautomation@qq.com
IPv6 network supported
All Categories
