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Description
Technical Specifications
Product Model | 900TBK-0001Manufacturer | Honeywell International Inc.Product Type | Low-Voltage Terminal Block (Removable Wiring Interface for HC900 I/O Modules)Series Compatibility | Honeywell ControlEdge HC900 Hybrid Controller I/O Modules (900Axx, 900Bxx, 900Cxx, 900Dxx, 900Gxx, 900Hxx families)Terminal Type | Screw Clamp (Phillips / flat-blade), detachable plug-in styleNumber of Positions | 20-position (for standard DI/DO/AO) or 36-position (for high-density analog AI modules), depending on mated I/O cardRated Voltage | ≤ 60 V AC/DC (Low Voltage designation—black housing)Rated Current | ≤ 5 A per terminal point (derated with ambient temperature)Wire Size Accepted | 24–12 AWG (0.2–2.5 mm²) solid or stranded; ferruled wire recommendedConductor Material | Tin-plated copper alloy contactsHousing Material | Polyamide 6.6 (PA66), UL94-V0 flame retardantOperating Temperature | 0 °C to +60 °C (block itself -20 °C to +100 °C)Mechanical Life | ≥ 100 insertion/removal cycles with mated I/O headerMounting | Snaps onto HC900 I/O module front connector; optionally retained on 35 mm DIN rail when separatedCertifications | cULus Listed, CE Marked, compliant with relevant IEC 60947-7-1 standardsColor | Black (Low Voltage Identification)
Main Features and Advantages
Secure screw-clamp termination: The Honeywell 900TBK-0001 employs high-torque screw-clamp terminals that create a gas-tight, low-resistance joint between the field wire and the I/O module’s signal path. This design resists loosening caused by thermal cycling and panel vibration—two leading causes of intermittent analog signal drift or false digital state transitions in process plants.Detachable plug-in design for fast module exchange: The terminal block plugs directly onto the male header of the HC900 I/O card and can be left wired in place while the electronic module is removed for replacement or diagnostics. This means field wiring does not need to be disturbed during an I/O module swap, significantly reducing commissioning and repair time. The Honeywell 900TBK-0001 thus supports the HC900 system’s hot-swap capability when performed per Honeywell safety procedures.Clear channel labeling and low/high-voltage color coding: Each terminal position on the Honeywell 900TBK-0001 is permanently marked with a numeric index aligned to the I/O point designation in Honeywell’s Hybrid Control Designer software. The black housing identifies it as the low-voltage variant, preventing accidental substitution with red high-voltage terminal blocks on modules that require the latter—a simple but important safeguard against miswiring.Industrial-grade materials for harsh environments: Molded from UL94-V0 rated flame-retardant nylon with high Comparative Tracking Index (CTI > 400), the Honeywell 900TBK-0001 resists surface tracking even in humid or mildly contaminated control room/enclosure atmospheres. Tin-plated copper alloy contacts provide long-term corrosion resistance and stable contact resistance over years of service.Universal compatibility across HC900 I/O types: The Honeywell 900TBK-0001 is the standard low-voltage terminal interface for most HC900 analog input (AI), analog output (AO), digital input (DI), and digital output (DO – low-side DC) modules. A single spare part number covers the majority of signal-termination needs in a typical HC900 cabinet, simplifying spare-parts inventory management.
Application Field
The Honeywell 900TBK-0001 is used wherever Honeywell ControlEdge HC900 hybrid controllers are deployed for process automation—including industries such as pharmaceuticals and biotechnology (fermentation, CIP/SIP skids), food & beverage (pasteurizers, batch blenders), specialty chemicals, heat treatment furnaces, glass manufacturing, water/wastewater treatment, and pilot-scale R&D process units. In these applications, the HC900 system’s I/O modules are mounted in a local or remote rack, and the Honeywell 900TBK-0001 provides the termination point where field instruments—temperature transmitters, pressure transducers, flow meters, limit switches, pushbuttons, and solenoid valves—are landed.A typical scenario involves a 16-channel analog input module (e.g., Honeywell 900A01-0101) receiving 4–20 mA signals from field transmitters via the Honeywell 900TBK-0001 screw terminals. Because the block is removable, an instrument technician can disconnect the entire AI module for calibration verification while the field wires—and their carefully documented terminations—remain undisturbed on the Honeywell 900TBK-0001. Similarly, in digital input applications monitoring safety interlock switches, the clear channel numbering on the Honeywell 900TBK-0001 assists electricians in verifying correct NO/NC wiring during FAT (Factory Acceptance Testing) and SAT (Site Acceptance Testing).The Honeywell 900TBK-0001 is also specified during cabinet rework or expansion projects where existing terminal blocks have become brittle, discolored, or have damaged screw threads after years of service. Replacing aged terminal blocks with fresh Honeywell 900TBK-0001 units is a low-cost preventive maintenance action that restores reliable contact integrity and extends the useful life of the HC900 I/O subsystem.
