Description

TheMITSUBISHI 81001-450-53-Ris a high-integrity terminal base unit designed to interface field wiring with MELSEC Q-Series digital I/O modules such as the QX80 (sinking input) and QY80 (sourcing output). As a critical mechanical and electrical bridge between the PLC rack and plant sensors/actuators, it provides secure screw-clamp connections, integrated fuse protection, and visual diagnostics—ensuring reliable signal transmission in demanding industrial environments.

Application Scenarios

At an automotive stamping plant in the U.S. Midwest, recurring false triggers from proximity sensors caused unplanned press stops due to loose spring-cage terminals on legacy I/O bases. After switching to theMITSUBISHI 81001-450-53-R, maintenance teams reported zero wiring-related faults over 14 months of continuous operation. The screw-clamp design with torque-controlled tightening eliminated intermittent contact, while the built-in fuse holder allowed rapid isolation of shorted solenoid valves without replacing entire modules. This real-world case highlights how the81001-450-53-Rtransforms field connectivity from a maintenance liability into a robust, serviceable layer of system reliability—directly addressing downtime caused by poor terminal integrity in high-vibration settings.

Parameter

Main Parameters

Value/Description

Product Model

81001-450-53-R

Manufacturer

Mitsubishi Electric Corporation

Product Category

I/O Terminal Base / Wiring Adapter for Q-Series PLC

Compatible Modules

QX80, QY80, QX40, QY40, and other 16-point Q-Series digital I/O

Number of I/O Points

16 (8 per side)

Terminal Type

Screw-clamp (not spring-cage)—supports AWG 24–12 stranded/solid wire

Voltage Rating

250 VAC / 24 VDC (field side)

Fuse Holder

Integrated (for output modules), accepts 3AG-type fuses (e.g., 2 A fast-acting)

Diagnostic Features

Per-channel LED indicators (mirrors module status)

Mounting Method

Snap-on to Q-Series baseplate (e.g., Q38B, Q68B); DIN rail compatible

Environmental Rating

IP20 (when installed in enclosure); operating temp: 0°C to +55°C

Certifications

CE, UL, cUL

Technical Principles and Innovative Values

Screw-Clamp Terminal Design for Vibration Resistance: Unlike push-in or spring terminals prone to loosening, the81001-450-53-Ruses captive screws that maintain constant clamping force—even under sustained machine vibration—ensuring low-resistance, stable connections over years of service.

Integrated Fuse Protection for Output Circuits: When used with sourcing output modules likeQY80, the81001-450-53-Rincludes a dedicated fuse slot per channel group, enabling selective fault isolation without damaging the expensive I/O module—a cost-saving innovation over non-fused bases.

Direct Signal Mirroring with Status LEDs: Each terminal point features a transparent window showing the module’s internal LED status, allowing technicians to verify signal presence at the wiring point—eliminating guesswork during troubleshooting.

Hot-Swap Ready Mechanical Interface: The base’s guide rails and retention latch allow safe insertion/removal of Q-Series modules without powering down the rack—critical for minimizing downtime during upgrades or replacements.

Application Cases and Industry Value

In a food & beverage bottling line in Southeast Asia, frequent washdowns caused corrosion in spring-type terminals, leading to sensor dropouts during CIP cycles. The integrator replaced all digital I/O bases withMITSUBISHI 81001-450-53-Runits inside stainless-steel enclosures. The sealed screw terminals resisted moisture ingress, and the visible LEDs enabled quick verification of photoelectric eye signals post-washdown. Line availability increased from 92% to 99.3%, and annual maintenance labor dropped by 60 hours per shift. Operators described the81001-450-53-Ras “the last wiring headache we ever had.”

Similarly, in a mining conveyor control system in Australia, the81001-450-53-R’s robust construction withstood dust, temperature swings, and electrical noise—maintaining signal integrity over 3 km of field cabling without opto-isolator add-ons.

Related Product Combination Solutions

QX80 / QY80: 16-point digital input/output modules that plug directly into the81001-450-53-R—ideal for discrete control of sensors and actuators.

Q38B / Q68B: Main base units that house the81001-450-53-Rand provide backplane power and data.

81001-450-54-R: Similar terminal base but for 32-point modules (e.g., QX42)—offers higher density for space-constrained panels.

QCPU (e.g., Q03UDVCPU): Central processor that coordinates I/O via the81001-450-53-R-connected modules in high-speed logic applications.

GX Works3: Programming software that supports I/O mapping and diagnostics for systems using81001-450-53-Rinterfaces.

A6CON1 / A6CON2: Legacy A-Series equivalent—useful when migrating from A to Q platform while reusing field wiring concepts.

QD77MS4: Motion module often co-installed in same rack—benefits from the clean grounding provided by proper81001-450-53-Rinstallation.

MR-J4-TM: Servo amplifier controlled via QY80 on81001-450-53-R—demonstrates integration of discrete safety interlocks.

Installation, Maintenance, and Full-Cycle Support

Installing theMITSUBISHI 81001-450-53-Rinvolves snapping it onto a Q-Series baseplate (e.g.,Q38B), then inserting the compatible I/O module (e.g.,QY80) until it clicks into place. Field wires are secured using a standard screwdriver—no special tools required—and torque should be set to 0.5–0.6 N·m to ensure gas-tight contact without stripping. For output circuits, install appropriately rated fuses (typically 1–2 A) in the designated slots to protect against short circuits.

Maintenance is minimal: periodically inspect terminals for corrosion or looseness, especially in humid or corrosive environments. If a channel fails, first check the fuse; if intact, use the visible LED to determine whether the fault lies in the field device or the module itself. The base’s modular design allows replacement without rewiring—simply unplug the module, swap the base if damaged, and reconnect.

We supply genuineMITSUBISHI 81001-450-53-Rterminal bases sourced from authorized distribution channels, each inspected for mechanical integrity, terminal smoothness, and LED transparency. Every unit is tested with a QY80 module under load to verify fuse continuity and signal pass-through. We provide detailed wiring diagrams, torque specifications, and compatibility matrices to ensure flawless integration.

Contact us for a customized solution—whether you’re building a new MELSEC Q system, upgrading legacy hardware, or restoring uptime after repeated field wiring failures. With the81001-450-53-R, your I/O isn’t just connected—it’s secured for decades of industrial service.