Allen-Bradley 1734-IR2 Point I/O 24V DC 2-Channel RTD Input Module

 

 

POINT I/O 2 Point RTD Input Module

The Allen-Bradley 1734-IR2 is a POINT I/O Resistance Temperature Detector (RTD) and resistance input module. This module is ideally used for temperature applications or applications with installed transducers that provide resistance signal as feedback variable.
The 1734-IR@, being part of the POINT I/O family is a cost-effective, panel space saving module as it supports mounting to a standard 35mm DIN rail and occupies only 56 x 12 x 75.5 mm (2.21 x 0.47 x 2.97 in.). Additionally, it has an open style enclosure which means any enclosure suitable to the application area is equally usable to the 1734-IR2. The 1734-IR2 mainly features Two (2) Resistance Temperature Detector (RTD) input channels. Each input channel is compatible for direct interfacing with RTD sensors such as 100 Pt α = 0.00385; 200 Pt α = 0.00385; 100 Pt α = 0.003916; 200 Pt α = 0.003916; 10 Cu α = 0.00427; 100 Ni α = 0.00618; 120 Ni α = 0.00618 and 120 Ni α = 0.00672 sensors and direct wiring of 0-600 Ω resistance signals. This module is a 16-nit resolution analog input module ideally used for temperature applications.

1. Efficient signal acquisition of discrete manufacturing equipment
As an important part of the Point I/O system, the 1734-IR2 module is designed for digital input signal acquisition in industrial automation. Its 2-channel independently isolated 24V DC input can quickly capture the switch status of devices such as sensors, buttons and limit switches, with a response time as low as 1ms, ensuring real-time monitoring of equipment status on the production line. In the door seal detection station of the automobile assembly line, the module can accurately identify sensor signals and cooperate with PLC to realize automated assembly process control. The application case of a Japanese car company shows that the efficiency of production line troubleshooting has increased by 35%.

2. Reliable input control of logistics sorting system
On the high-speed sorting line of the express sorting center, the 1734-IR2 module detects the location and size of the package in real time by collecting signals from photoelectric sensors. The module supports a wide temperature range of -40℃~70℃, has strong anti-electromagnetic interference ability, and can operate stably even in high dust and strong vibration environments. After a logistics company adopted this module, the sorting accuracy rate increased from 98.5% to 99.9%, saving more than 2 million yuan in manual re-inspection costs annually. The compact design of the module (only 22.5mm wide) can be densely installed to meet the high space requirements of the sorting system.

3. Input unit for intelligent transformation of traditional equipment
For the automation upgrade of old equipment, the 1734-IR2 module provides an economical and efficient solution. It can be easily integrated into the DeviceNet or EtherNet/IP network through an adapter, retaining the original mechanical structure while realizing digital control. In the transformation case of a food packaging company, the module was used to replace the mechanical travel switch, the equipment failure rate decreased by 60%, and the production data was networked for analysis. The module supports live plugging and unplugging, and there is no need to shut down for maintenance, which is particularly suitable for transformation projects that require continuous production.

✦ High-Precision RTD Interface: The 1734-IR2 module provides two independent, high-accuracy input channels designed specifically to interface with 2-wire or 3-wire Resistance Temperature Detectors (RTDs), converting low-resistance thermal signals into precise digital temperature data.
✦ Versatile Sensor Profile Support: It natively supports industry-standard platinum RTD sensors, including 100 Ω, 200 Ω, and 500 Ω configurations (alpha = 0.00385), as well as copper 10 Ω sensors, ensuring compatibility across diverse industrial thermal monitoring applications.
✦ POINT I/O Architectural Efficiency: As a core component of the Allen-Bradley POINT I/O family, the 1734-IR2 utilizes a compact, modular design that installs horizontally or vertically onto a standard DIN rail, reducing control cabinet space requirements.
✦ Granular Data Resolution: The 1734-IR2 features a high-resolution 16-bit analog-to-digital converter (ADC) that delivers stable and highly repeatable temperature measurements, critical for precise closed-loop process control.
✦ Removable Terminal Block (RTB) Support: The module mounts securely into a 1734-TB or 1734-TBS terminal base assembly, allowing the 1734-IR2 unit to be hot-swapped (Removal and Insertion Under Power - RIUP) without disconnecting any field wiring, significantly reducing machine downtime.

Quality Control & Inspection Protocol

At PLC Leader, every Allen-Bradley 1734-IR2 POINT I/O module undergoes a rigorous, multi-stage verification process to ensure flawless performance in demanding thermal processing environments:

• Authenticity & Factory Seal Verification: We guarantee all 1734-IR2 modules are 100% genuine products, sourced strictly through premium, traceable distribution channels.
• Hardware & Pin Integrity Audit: Technicians thoroughly inspect the physical backplane slide locks, side-mount DIN rail clips, and the gold-plated interface pins to ensure zero structural or contact defects.
• Component-Level Safety Protection: All modules are handled within certified ESD-controlled environments and sealed in industrial anti-static packaging to protect the internal 16-bit analog circuitry during transit.
• Extended Warranty Support: To secure your automation investment, each module is fully backed by our comprehensive 1-year warranty, covering direct replacement or repair.

Product Certifications & Standards Compliance

The Allen-Bradley 1734-IR2 module is engineered to comply with strict international automation and industrial environment regulations. When properly installed in a designated 1734-TB or 1734-TBS terminal base, the hardware meets the following standards:
➤ CE Mark: Fully compliant with all applicable European Directives for electromagnetic compatibility (EMC) and low-voltage industrial apparatus.
➤ UL & c-UL Listed: Certified for safety standards under UL 508 for industrial control equipment, applicable for both United States and Canadian installations.
➤ Hazardous Location Approvals (Ex / Class I Div 2): Rated for use in Class I, Division 2, Groups A, B, C, and D hazardous environments, as well as ATEX Zone 2 explosive atmospheres, featuring certified safe operation under specified thermal ranges.
➤ C-Tick / RCM: Registered for compliance with Australian Radiocommunications Act requirements for emission and noise immunity.
➤ Marine Approvals: Built to satisfy the vibration, humidity, and environmental testing specifications mandated by major maritime classification societies for shipboard and offshore deployment.

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Installation and Commissioning

Terminal Base Insertion: The 1734-IR2 module requires integration with a 1734-TB or 1734-TBS terminal base assembly to successfully map the 2-channel field terminations to the interior backplane logic.
Chassis Alignment: Secure the combined base unit onto a standard 35mm DIN rail, applying firm pressure until the slide locks snap into position, confirming tight coupling with adjacent POINT I/O hardware.
Profiles and Keying: When configuring the slot assignment within your controller's programming environment, match the exact electronic keying data to prevent the system from executing code on mismatched physical hardware.

Operational Maintenance and Diagnostics

Hot-Swap Execution: This module features Removal and Insertion Under Power (RIUP), meaning operators can extract a malfunctioning 1734-IR2 unit from its terminal base for swap-outs without dropping power to the remaining network nodes.
Fascia Status Verification: Regular maintenance sweeps should check the module status indicator; a continuous green light proves the internal processor is running without faults, while a solid or blinking red signal demands diagnostic review.
Fault Detection: Loop breaks, sensor short-circuits, or open RTD channels trigger a flashing red response on the corresponding channel status light, isolating field-side wiring issues instantly.

Accessory and Hardware Support

Terminal Blocks: If a wire retention screw strips or a contact degrades, standalone 1734-RTB or 1734-RTBS removable block pieces can be ordered separately to restore the wiring panel.
Power Management Nodes: For setups where field current demands exceed baseline thresholds, the I/O rack accepts 1734-FPD field power distributors and 1734-EP24DC expansion power units to split or boost the internal bus.
Segment Interconnects: When panel footprint limitations require splitting the I/O layout onto a secondary rail, 1734-EXT extension cables provide the necessary high-speed data link between the separated segments.

1734-IR2 (Standard RTD & Resistance): The standard 2-channel analog input module. It measures resistance (Ohms) and interfaces with common Platinum (Pt) or Nickel (Ni) RTD sensors.
1734-IR2E (High-Resolution RTD): The high-resolution version of the 1734-IR2. It provides higher analog-to-digital (A/D) accuracy for precision temperature control loops.
1734-IT2I (Isolated Thermocouple): Often grouped with the IR2 but designed for Thermocouple (TC) sensors and millivolt signals. It features complete channel-to-channel isolation.

Technical Specification Comparison Table

Sourcing & Replacement Tips: 
➠ Sensor Verification : Always check the field wiring before ordering. If the field sensor is a Pt100 RTD or a 3-wire potentiometer, source the 1734-IR2. If it is a thermocouple wire (e.g., Type K), you must order the 1734-IT2I.
➠ Base Compatibility : The 1734-IR2 sits on a standard 1734-TB terminal base. If you are retrofitting a system from RTD (IR2) to Thermocouple (IT2I), you must replace the base with a 1734-TBCJC to avoid ambient temperature measurement errors.
➠ Precision Upgrades : If a customer complains about temperature fluctuations or requires higher control precision (down to 0.01 °C), the 1734-IR2 can be directly replaced with the 1734-IR2E high-resolution module without changing the physical field wiring.

FAQ

 

Q: How about the warranty?

A: All goods have 1 year warranty.

Q: What about the delivery time?

A: Normally in 1-3days.

Q: Other suppliers have a better price than yours?

A: To create the greatest benefit for clients is our belief, if you have a better price, please let we know. We will try the best to meet your price and support you.

Q: What about the shipment?

A: We can arrange shipment by DHL, FedEx, UPS,TNT with competitive price, of course, customers can also use their own freight forwarders.

Q: How about the terms of payment?

A: Generally through T/T.

Q: Do you supply discontinued or rare parts?

A: Yes, we specialize in sourcing obsolete, discontinued, and hard-to-find legacy components.