Product Details
Overview
The Allen-Bradley 1794-TB32 is a high-capacity FLEX I/O terminal base designed to accommodate 32 current sinking digital input channels. It delivers reliable signal acquisition and system integration for modular control networks. Compatible with various terminal bases, this unit is engineered to ensure precise, isolated communication between field devices and controllers.
Technical Specifications
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Manufacturer: Allen-Bradley
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Model / Part Number: 1794-TB32
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Product Type: FLEX I/O Digital Input Module / Terminal Base
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Number of Inputs: 32, current sinking
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Recommended Terminal Bases: 1794-TB32, 1794-TB32S, 1794-TB62DS, 1794-TB62EXD4X15
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Nominal Input Impedance: 22.2 kΩ
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Isolation Voltage: 50 V continuous, Basic Insulation; type tested at 2121 V DC for 2 s (field side to system)
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Channel Isolation: No isolation between individual channels
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FlexBus Current: 25 mA @ 5 V DC
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Max Power Dissipation: 6.0 W @ 31.2 V DC
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Max Thermal Dissipation: 20.47 BTU/hr @ 31.2 V DC
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Terminal Base Screw Torque: Determined by installed terminal base
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External DC Supply Voltage: 24 V DC nominal
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Indicators: 32 yellow status LEDs for field side monitoring
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Dimensions (L x W x H): 6.9 × 9.4 × 9.4 cm
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Weight: 2 kg
Applications
Suitable for distributed digital input collection in large-scale automation systems, process control, and remote monitoring. Ideal for use with ControlLogix or CompactLogix networks requiring high-channel density and reliable field communication.
FAQ
Q: How many input channels does 1794-TB32 support?
A: This terminal base accommodates 32 current sinking digital inputs.
Q: Can this unit isolate individual channels?
A: No, individual channels are not isolated; isolation is provided between the field and system side.
Q: Which terminal bases are compatible with this module?
A: Compatible with 1794-TB32, 1794-TB32S, 1794-TB62DS, and 1794-TB62EXD4X15.
Additional Information
- 100% Genuine Parts: All products are original and authentic, ensuring reliable industrial performance.
- 30-Day Refund Guarantee: Return any in-stock item within 30 days in original, unopened packaging for a full refund (excluding shipping and fees).
- 12-Month Warranty: Covers defects in materials or workmanship; excludes misuse, normal wear, or unauthorized modifications.
- Worldwide Shipping: We ship via USPS, UPS, FedEx, and DHL. Delivery times vary by country and may be subject to customs or import fees.
- Support & Contact: Technical and warranty assistance is available anytime. Contact us here: Contact.
- Purchase Guidance: Check product specifications and compatibility carefully before ordering to ensure proper application.
Tech & Buying Guide
Understanding Safety Relays in Industrial Automation: Architecture, Operation, and Functional Safety
Standard electromechanical relays provide basic electrical isolation between low-voltage control circuits and high-power output loads. A traditional switching relay features a magnetic coil driving mechanical Common (COM), Normally-Open (NO), and Normally-Closed (NC) contacts. However, standard relays pose severe functional risks when deployed in critical safety interlock circuits. High current inrush or mechanical wear can weld contacts together permanently. If contact welding occurs in an emergency stop circuit, pressing the button fails to halt hazardous machinery movements. Consequently, global functional safety standards prohibit standard relays for critical machine guarding functions.
Mastering Wire Identification in Industrial Automation: The Power of Ferrules and Cross-Ferruling
Proper wire labeling forms the cornerstone of reliable control system installation and long-term maintenance. In complex industrial automation environments, technicians terminate thousands of conductor ends inside control panels, marshalling racks, and field junction boxes. Ferrules serve as individual tube-shaped sleeve markers slipped onto conductors before final termination. While technicians historically relied on pre-printed individual letter rings, modern control panel builders utilize automated ferrule printing machines. These thermal-transfer printers generate durable, single-sleeve heat-shrink tags directly matching approved wiring schematics, significantly accelerating cabinet assembly workflows.
Understanding Marshalling Cabinets in Industrial Automation and Control Systems
Marshalling cabinets serve as the crucial connection hub between field instruments and centralized processing units. In large DCS and PLC control system architectures, hundreds of multipair field cables run from local junction boxes to the central instrument equipment room. The marshalling cabinet houses field terminal blocks, surge arresters, intrinsic safety isolation barriers, and interposing relays. By segregating field field-wiring terminations from sensitive processor hardware, engineers protect expensive controller backplanes from high-voltage transients. Consequently, this modular separation dramatically streamlines maintenance workflows and simplifies system expansion.