NACHI UM356B – Controller I/O Module for NACHI Robot Systems

The NACHI UM356B appears to be an I/O controller board used inside NACHI robot control cabinets (commonly seen with AX/FD generation systems). From my experience, plants keep one or two of these on the shelf because it’s a fast way to bring a robot cell back online if an I/O channel or communication lane fails. You might notice that the UM-series boards are designed for quick swap, keeping wiring changes to a minimum—very handy during a line stop.

Typical use cases include replacing a faulty I/O backplane board, extending discrete I/O capacity in a controller, or restoring encoder/auxiliary feedback lines that feed motion or interlock logic. One thing I appreciate is how these modules usually slot straight into the controller rack and reuse the existing harnesses, so downtime is kept tight.

Order Placement Process & Guarantees

• Warranty: 365 days
• Delivery time: 1 week for in-stock items; no more than one month at the latest
• Payment: 50% advance payment; full payment before delivery
• Express options: FedEx, UPS, DHL

We test boards prior to dispatch and pack them for ESD safety. A maintenance lead from an automotive line told us the “board swap + re-seat” took under 20 minutes and cleared intermittent I/O loss that had been throwing false interlocks—exactly the kind of quick win you want during a shift.

Key Features

• Direct-fit replacement – Designed to install in the NACHI controller rack without cabinet modifications, typically reusing factory harnessing.
• Mixed industrial I/O – Supports 24 VDC discrete I/O and auxiliary feedback lanes commonly used for interlocks, sensors, and motion-related signals.
• Stable backplane communication – Interfaces over the controller’s proprietary bus for low-latency signaling; no field PLC changes in most cases.
• Maintenance-friendly – Service header for diagnostics and firmware alignment when required by the controller generation.
• Fast swap – Typically two-point screw fixation and keyed connectors help reduce installation time and error.

Technical Specifications

Related or Supporting Products

• NACHI UM356A / UM357B – Similar board series seen in adjacent controller slots. In many cases, UM357B carries incremental updates in channel count or diagnostics.
• NACHI FD Series Controller (e.g., FD11) – Controller platform where UM-series boards are commonly installed.
• I/O Harness Set for UM-series – Mating cables and terminal blocks for discrete I/O and feedback lines; helpful when converting or expanding an existing cell.

Installation & Maintenance

• Cabinet environment: Mount inside a sealed controller cabinet meeting industrial control standards; maintain clean, dry, and well‑ventilated conditions.
• Wiring: Use the original NACHI harness set where possible; keep 24 VDC I/O wiring segregated from motor power to minimize noise.
• ESD & safety: Power down, lockout/tagout, and observe ESD precautions when swapping boards. Verify backplane connectors are fully seated.
• Commissioning: After replacement, perform I/O self-tests and confirm interlock states. Some revisions may require parameter/firmware alignment—back up the controller first.
• Routine care: Quarterly dust removal with dry air (low pressure), check terminal tightness, and review event logs. Firmware updates should follow the controller’s service bulletin schedule.

Quality & Certifications

• Certifications: Typically aligned with the controller system’s CE/UL/ISO compliance; RoHS conformity is common for newer revisions.
• Traceability: Supplied with identifiable labels/serials for maintenance records and line validation.
• Warranty support: 365-day warranty; advance replacement available for in-stock items with 1-week dispatch.