Name: ABB 3BDH000741R1 CTI 21-P EX | Explosion-Proof Digital Input Module | SUNSHINE XIHE
Brand: ABB
Price: 13037.00 USD
Availability: InStock

Description

ABB 3BDH000741R1 CTI 21-P EX Explosion-Proof Digital Input Module

Product Overview：3BDH000741R1 CTI 21-P EX

The ABB 3BDH000741R1 CTI 21-P EX is a high-reliability Explosion-Proof Digital Input Module designed for industrial environments with extreme safety requirements, such as hazardous areas classified as Zone 1 (gaseous) or Zone 21 (dust). As part of ABB’s CTI 21 Series for explosion-protected applications, this module serves as a critical interface between field devices and control systems, converting discrete input signals from switches, sensors, or relays into digital data compatible with PLCs, DCS, or safety instrumented systems (SIS). The 3BDH000741R1 CTI 21-P EX combines robust explosion-proof construction with advanced signal conditioning, ensuring reliable operation in environments prone to explosive atmospheres, such as oil refineries, chemical plants, and pharmaceutical facilities.

Featuring 8 galvanically isolated channels, the ABB 3BDH000741R1 CTI 21-P EX supports a wide range of input voltages (24–230 V AC/DC) and incorporates surge protection to withstand transient overvoltages. Its compact design (120 mm × 100 mm × 80 mm) and DIN rail mounting facilitate easy integration into control panels in hazardous zones, while compliance with international explosion-proof standards (ATEX, IECEx) guarantees safety and regulatory adherence. The module’s diagnostic capabilities, including real-time monitoring of signal integrity and power supply status, enable proactive maintenance and reduce unplanned downtime, making it an essential component for mission-critical automation systems in high-risk industries.

In industrial automation ecosystems, the 3BDH000741R1 CTI 21-P EX bridges the gap between potentially explosive field environments and secure control rooms, ensuring seamless data flow for process optimization and safety interlocking. Its dual-channel redundancy option enhances system resilience, while the fail-safe design ensures that faulty inputs are detected and reported immediately, minimizing the risk of operational disruptions. Whether deployed in standalone configurations or integrated into larger ABB AC 800M systems, this module delivers unparalleled reliability in harsh conditions, safeguarding both personnel and equipment.

Technical Specifications：3BDH000741R1 CTI 21-P EX

Parameter Name	Parameter Value
Product Model	3BDH000741R1 CTI 21-P EX
Manufacturer	ABB
Product Type	Explosion-Proof Digital Input Module
Explosion Protection	ATEX II 2G Ex db IIC T6 Gb / IECEx Ex db IIC T6 Gb
Input Channels	8 isolated channels
Input Voltage Range	24–230 V AC/DC (50/60 Hz)
Isolation Voltage	2.5 kV RMS (channel-to-channel/channel-to-ground)
Physical Dimensions	120 mm (H) × 100 mm (W) × 80 mm (D)
Weight	0.8 kg
Operating Temperature	-40°C to +70°C
Mounting	DIN rail (35 mm)
Certifications	CE, ATEX, IECEx, UL, CSA
Signal Response Time	≤10 ms

3BDH000741R1 CTI 21-P EX

Key Features and Advantages：3BDH000741R1 CTI 21-P EX

Explosion-Proof Design: The 3BDH000741R1 CTI 21-P EX is certified for use in Zone 1/21 hazardous areas, with a robust enclosure that prevents ignition of surrounding explosive gases or dust. Its “double housing” design and flameproof barriers meet the strictest safety standards, ensuring compliance in globally regulated industries.

Galvanic Isolation and Surge Protection: Each channel features 2.5 kV RMS galvanic isolation to protect against ground loops and voltage surges, while built-in transient voltage suppression (TVS) diodes shield against electromagnetic interference (EMI) and radio-frequency interference (RFI). This ensures stable signal transmission even in high-noise environments.

Flexible Voltage Compatibility: Supporting a wide input voltage range (24–230 V AC/DC), the module eliminates the need for dedicated signal converters, simplifying integration with diverse field devices such as proximity switches, pushbuttons, and motor starters. This versatility reduces hardware costs and streamlines system design.

Advanced Diagnostics: Real-time diagnostics monitor channel status, power supply health, and temperature, with LED indicators providing immediate visual feedback for fault detection. The module also supports remote diagnostics via integrated communication protocols, enabling predictive maintenance and minimizing downtime.

Compact and Rugged Construction: Despite its explosion-proof rating, the 3BDH000741R1 CTI 21-P EX maintains a compact footprint, optimizing space in control panels. Its rugged aluminum alloy housing resists corrosion, vibration, and 冲击 (shock), ensuring long-term reliability in harsh industrial settings.

Seamless System Integration: Compatible with ABB’s S800 I/O and AC 800M control systems, the module integrates effortlessly with existing automation architectures. It also supports open communication protocols like Modbus RTU, enabling interoperability with third-party controllers and SCADA systems.

3BDH000741R1 CTI 21-P EX

Application Areas：3BDH000741R1 CTI 21-P EX

The ABB 3BDH000741R1 CTI 21-P EX is ideally suited for industries and applications where explosion safety is non-negotiable:

Oil & Gas: Monitoring valve positions, emergency shutdown (ESD) signals, and pump status in offshore platforms, refineries, and pipeline compression stations. The module’s explosion-proof certification ensures safe operation in zones with flammable hydrocarbons.
Chemical Processing: Detecting pressure switches, level sensors, and safety interlocks in chemical plants, where volatile gases or dust pose significant explosion risks. The module’s fail-safe design prevents unplanned releases of hazardous materials.
Pharmaceuticals and Food Production: Ensuring compliance with strict safety standards in facilities handling flammable solvents or combustible powders. The 3BDH000741R1 CTI 21-P EX monitors mixer status, conveyor belt alignment, and sterilization process signals in explosive environments.
Mining and Minerals: Operating in dusty environments with combustible particles, such as coal mines or metal processing plants. The module’s dust-ignition-proof (Ex tb) rating makes it suitable for Zone 21 applications.

Specific use cases include:

Safety Instrumented Systems (SIS): Providing reliable discrete inputs for ESD systems, ensuring rapid response to critical events like overpressure or temperature spikes.
Machine Safety in Explosive Zones: Converting signals from safety 光幕 (light curtains) or two-hand controls in automated machinery, ensuring operator safety without compromising system integrity.
Remote Terminal Units (RTUs): Enabling remote monitoring of field devices in distributed oil and gas networks, where harsh environmental conditions and explosion risks are inherent.
3BDH000741R1 CTI 21-P EX

Installation and Maintenance：3BDH000741R1 CTI 21-P EX

Installation Preparation:
Before installing the ABB 3BDH000741R1 CTI 21-P EX, verify that the installation site complies with ATEX/IECEx requirements for Zone 1/21. Ensure the DIN rail is grounded and located in a ventilated enclosure to prevent heat buildup. Use certified explosion-proof cables and glands to connect field devices, ensuring proper sealing to maintain the module’s flameproof integrity. Configure input parameters (e.g., voltage type, debounce time) using ABB’s Control Builder M software, and perform a functional test to validate signal transmission and diagnostics.

Maintenance Recommendations:

Routine Inspections: Quarterly checks should include visual inspection of the enclosure for physical damage, loose connections, or signs of corrosion. Clean the module with a dry, non-conductive cloth to remove dust or debris that could affect heat dissipation.
Functional Testing: Annually verify channel functionality using a calibrated signal source, ensuring each input responds within the specified tolerance. Document test results for compliance with safety audits.
Firmware Updates: Periodically update the module’s firmware via ABB’s official software to access new features or security patches, following the manufacturer’s guidelines to avoid operational disruptions.
Spare Parts Management: Store spare 3BDH000741R1 CTI 21-P EX modules in a controlled environment (10–30°C, 20–80% RH) to ensure readiness for rapid replacement. Avoid exposing spares to direct sunlight or corrosive atmospheres.
3BDH000741R1 CTI 21-P EX

Product Warranty：3BDH000741R1 CTI 21-P EX

Our company provides a 12-month quality warranty for the ABB 3BDH000741R1 CTI 21-P EX, covering hardware defects under normal use. In the event of performance issues or functional failures, we offer prompt replacement services to minimize downtime. For discontinued models or urgent requirements, our global supply chain network ensures efficient sourcing of rare or legacy components, supporting continuous operation of industrial systems. Our technical support team is available 24/7 to assist with installation, troubleshooting, and system optimization, delivering reliable solutions to meet your automation needs.

For product inquiries, contact our team via Whatsapp:+86 18859254943 or E-mail :sales@ygplc.com.

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