Fuji Electric NP1Y16R-08 PLC Digital Output Module – NP1 MICREX-SX Series

Fuji Electric NP1Y16R-08 — 16-Point Relay Contact Output Module for NP1 MICREX-SX PLC Systems

The NP1Y16R-08 is a 16-point relay contact digital output module engineered for the Fuji Electric NP1 MICREX-SX programmable controller platform. Within a distributed I/O architecture, this module occupies a defined slot on the NP1 expansion base and communicates with the CPU via the SX-BUS backplane at a fixed cycle time synchronized to the CPU scan. Each of its 16 output channels drives an independent electromechanical relay, providing galvanic isolation between the PLC logic side and the field load circuit — a design choice that eliminates common-mode noise coupling from inductive loads such as solenoid valves, motor contactors, and pilot lamps.

The -08 suffix in the part number designates the 8-pin plug-in connector interface, which allows field wiring to be pre-terminated on the connector body and detached from the module body during replacement. This mechanical architecture reduces mean-time-to-repair (MTTR) in production environments where downtime cost per minute is measurable. The module draws its logic supply from the backplane 5 V DC bus, while the relay coil drive is internally regulated, requiring no external auxiliary supply for the output stage.

In the context of a complete NP1 control loop, the NP1Y16R-08 sits at the terminal boundary between the deterministic scan cycle of the CPU and the physical actuation layer of the machine. The CPU writes output image data to the module’s output register at the end of each scan; the module’s internal relay driver circuit converts that register state into coil energization within the relay’s specified operate time (typically ≤10 ms), ensuring that the physical output state tracks the program logic with a bounded and predictable latency. This determinism is essential in sequencing applications where output timing directly governs mechanical motion profiles.

Real-time Stock & RFQ: [email protected] | WhatsApp: +86 18359268345

Technical Parameters

Hardware Logical Analysis

The NP1Y16R-08 implements a relay-per-channel architecture rather than a shared relay matrix, meaning each of the 16 output points has a dedicated relay coil, armature, and contact set. This one-to-one mapping eliminates cross-point interference and allows each channel to switch independently at its rated 2 A without derating adjacent channels — a constraint that affects some transistor-output modules using shared power rails.

From an EMC perspective, relay contact outputs inherently provide high common-mode rejection. The galvanic break between the PLC logic circuit and the field load circuit means that transient voltages induced on the load side — such as back-EMF spikes from inductive loads or line-frequency noise from AC contactors — cannot propagate into the backplane bus. The module’s PCB layout routes the relay coil drive traces with guard rings referenced to the logic ground, and the relay body itself acts as a physical barrier between the high-voltage field terminal block and the low-voltage logic connector.

The -08 connector interface uses a spring-clamp or screw-clamp terminal block (depending on the specific connector variant ordered separately) that maintains contact force over the module’s rated temperature range. Thermal cycling between 0 °C and 55 °C produces differential expansion between the copper conductor and the terminal body; the spring-clamp design compensates for this by maintaining a constant contact force, reducing the risk of intermittent connections in environments with daily temperature swings.

The module’s output register is mapped into the CPU’s output image table at a fixed address determined by the slot position on the expansion base. The SX-BUS protocol performs a deterministic refresh of this register at the end of each CPU scan cycle. Because the relay operate time (≤10 ms) is bounded and documented, system designers can calculate worst-case output latency as: CPU scan time + SX-BUS transfer time + relay operate time. For a typical NP1 system with a 5 ms scan, total worst-case latency from program instruction execution to contact closure is under 20 ms — a figure that is acceptable for the vast majority of discrete control applications including conveyor sequencing, valve actuation, and alarm annunciation.

The module also incorporates output status LEDs — one per channel — that reflect the state of the relay coil drive signal, not the contact state. This distinction is important during fault diagnosis: if an LED is ON but the load is not energized, the fault is in the field wiring or the load itself, not in the PLC output logic. This hardware-level diagnostic transparency reduces troubleshooting time without requiring a laptop or programming tool.

System Integration Benefits

• Deterministic scan-synchronized output refresh: The SX-BUS backplane protocol guarantees that output register data is transferred within a fixed window at the end of each CPU scan, eliminating jitter in output timing that would otherwise arise from asynchronous I/O polling.
• Galvanic isolation per channel: Each relay provides a complete electrical break between the PLC logic domain and the field load circuit, allowing the module to interface with AC 250 V and DC 30 V loads without additional isolation relays or optocoupler barriers in the field panel.
• Zero derating at full simultaneous load: All 16 channels can be energized simultaneously at 2 A each without thermal derating, simplifying panel design by eliminating the need to calculate simultaneous-ON derating factors.
• Plug-in connector for zero-rewire replacement: The -08 connector body retains field wiring when the module is removed, reducing replacement time to under two minutes and eliminating wiring errors during maintenance.
• Per-channel LED diagnostics: Hardware-level output status indication allows field technicians to isolate faults to the PLC output stage, field wiring, or load device without connecting a programming terminal, reducing mean diagnostic time.
• Broad load voltage compatibility: The relay contact’s ability to switch both AC 250 V and DC 30 V loads from a single module type reduces the number of distinct module part numbers required in a mixed AC/DC panel, simplifying spare parts inventory.
• Mechanical relay endurance rated for continuous-duty cycles: With a mechanical endurance of 10 million operations and electrical endurance of 100,000 operations at rated load, the module is suited for applications with high switching frequency such as packaging machinery and conveyor diverters.
• Slot-position-based I/O addressing: The NP1 platform assigns I/O addresses based on physical slot position, making I/O mapping predictable and eliminating the need for software-based address configuration during commissioning or module replacement.
• Vibration and shock resistance for industrial mounting: Rated to 9.8 m/s² continuous vibration and 147 m/s² shock, the module maintains contact integrity in mobile equipment, press lines, and other high-vibration environments without additional shock-mount hardware.
• Dielectric strength of AC 1,500 V between I/O and logic: This isolation rating provides a safety margin above the rated AC 250 V load voltage, meeting the requirements of IEC 61131-2 for PLC I/O module isolation in industrial control panels.

Quality Assurance & Global Logistics

Every NP1Y16R-08 unit supplied by siemensplc.com is sourced as genuine Fuji Electric OEM product, manufactured in Japan under Fuji Electric’s ISO 9001-certified production system. Units are not refurbished, remanufactured, or relabeled. Original manufacturer labeling, lot traceability codes, and factory seals are intact on all shipped units.

Pre-shipment handling follows a documented inspection protocol: visual inspection of housing, connector pins, and label integrity; verification of lot number against procurement records; and ESD-safe packaging in anti-static bags with foam cushioning inside sealed corrugated cartons. Each shipment includes a commercial invoice, packing list, and certificate of origin. Additional documentation such as material safety data sheets or RoHS compliance declarations is available upon request.

Logistics operations are based in Xiamen, China (Fujian Province), with direct access to Xiamen Gaoqi International Airport and Xiamen Port — two of China’s primary export hubs for industrial goods. Standard in-stock orders are dispatched within 1–2 business days. Express freight via DHL Express, FedEx International Priority, or UPS Worldwide Express is available for time-critical procurement. Transit times to major industrial regions: Southeast Asia 2–4 days, Europe 3–5 days, North America 4–6 days, Middle East 3–5 days. Bulk orders and project-based standing purchase agreements are supported with volume pricing and scheduled delivery windows.

A 12-month warranty from the date of shipment covers manufacturing defects. Warranty claims are processed through direct communication with our technical team; replacement units are dispatched upon fault confirmation. For B2B procurement teams requiring formal purchase order processing, LC arrangements, or third-party inspection, contact [email protected] with your procurement requirements.

Contact Information

Email: [email protected]
WhatsApp: +86 18359268345
Web: siemensplc.com
Location: Xiamen, China
© 2026 siemensplc.com. All rights reserved.