FUJI ELECTRIC SC-1N AC Magnetic Contactor

Product Details

SC-1N Product Description

The Fuji SC-1N is a compact, high-reliability AC magnetic contactor from Fuji Electric's proven SC Series, engineered for seamless integration into modern smart factory environments. As industrial facilities transition toward fully connected production architectures, the SC-1N serves as a critical switching node within the broader automation data chain — bridging field-level motor control with upper-layer monitoring, diagnostics, and control systems. Whether deployed in motor control centers, distribution panels, or machine-level starter assemblies, the SC-1N delivers the switching performance and network-readiness that Industry 4.0 demands.

In a connected factory, every device must contribute to the data flow. The SC-1N is designed to operate within systems where Fuji Electric MICREX-SX PLC controllers or third-party PLCs manage sequencing logic, while field bus gateways and communication modules relay real-time status data upstream to SCADA and HMI platforms. Its compact SC Series form factor ensures compatibility with standard DIN-rail panel layouts, reducing integration complexity across new and retrofit installations alike.

The SC-1N operates at the field device layer of a multi-tier industrial network, where its coil control and auxiliary contact outputs become integral data points in the plant-wide automation architecture. In a typical smart factory deployment, a Fuji Electric MICREX-SX NP1PS series PLC issues switching commands to the SC-1N coil via digital output modules, while the auxiliary contact feeds back run/stop status to the PLC's input card — creating a closed-loop confirmation signal that can be logged, alarmed, and visualized at the SCADA level.

Upstream from the PLC, an industrial Ethernet switch — such as those in the Fuji Electric or third-party managed switch families — connects the PLC to the plant network backbone, enabling real-time data exchange with SCADA servers and HMI panels. Operators monitoring a Fuji Electric V9 series HMI or equivalent touchscreen can view motor run status, contactor cycle counts, and fault conditions without leaving the control room.

For facilities using remote I/O modules — such as Fuji Electric's distributed I/O or compatible third-party units — the SC-1N's auxiliary contacts can be wired into remote terminal blocks, allowing the contactor's operational state to be transmitted over PROFIBUS DP or DeviceNet field buses to the master PLC. This architecture is particularly valuable in large-scale plants where motor control panels are distributed across multiple production zones.

In variable-speed drive applications, the SC-1N is frequently used as a bypass or isolation contactor alongside Fuji Electric FRENIC series variable frequency drives (VFDs), enabling safe motor switching during drive maintenance or fault bypass scenarios. The VFD's digital output signals coordinate with the PLC to sequence the SC-1N's operation, ensuring zero-crossover switching and protecting both the motor and the drive from inrush damage.

Edge-layer connectivity is further enhanced when the SC-1N panel is monitored by an industrial IoT gateway or edge computing module, which aggregates contactor status data alongside temperature sensors, current transducers, and power meters installed in the same panel. This aggregated data stream feeds into cloud-based or on-premise data visualization platforms, enabling predictive maintenance models that track contactor wear based on switching frequency and load current trends.

For process industries requiring Modbus RTU communication, a protocol gateway module can bridge the SC-1N's hardwired status signals into a Modbus register map, making the contactor's state visible to any Modbus-compatible SCADA or DCS system. This approach is widely used in water treatment, oil and gas, and chemical processing facilities where legacy SCADA systems coexist with modern field devices.

The SC-1N's integration into a motor protection relay circuit — such as the Fuji Electric TR series thermal overload relay — adds an additional layer of data richness: trip events from the overload relay can be captured by the PLC, timestamped, and forwarded to the SCADA historian, creating a complete fault record for root cause analysis and regulatory compliance reporting.

One of the most persistent challenges in industrial automation is the fragmentation of device-level data — motors run, contactors switch, and drives trip, but without a connected architecture, these events remain invisible to plant management systems. The Fuji SC-1N addresses this gap by providing reliable auxiliary contact outputs that serve as the hardware foundation for status monitoring in any PLC or remote I/O architecture.

Protocol fragmentation is resolved by pairing the SC-1N with appropriate gateway modules that translate hardwired I/O signals into standard industrial protocols — whether PROFIBUS, DeviceNet, EtherNet/IP, or Modbus TCP — ensuring that legacy and modern systems can coexist without data silos. Remote monitoring becomes straightforward when the SC-1N's status is mapped into the SCADA tag database, enabling operators to detect contactor failures, count switching cycles, and schedule preventive maintenance from a central dashboard.

Production line transparency is enhanced when every SC-1N in a motor control center contributes its run/stop status to the plant historian, allowing production managers to correlate motor activity with output rates, energy consumption, and downtime events. Alarm tracking is simplified when PLC logic monitors the SC-1N's auxiliary contact for unexpected state changes — a contactor that fails to close on command triggers an immediate alarm, reducing mean time to repair and minimizing unplanned downtime.

System scalability is a core strength of the SC Series architecture: as production capacity expands, additional SC-1N units can be added to existing motor control panels without redesigning the communication infrastructure, since each unit integrates into the same PLC I/O framework already in place. All units supplied by NANKMOS are pre-shipment tested and backed by a 12-Month Warranty, with in-stock availability for rapid deployment.

Q1: Can the Fuji SC-1N be monitored remotely via SCADA or HMI systems?Yes. The SC-1N's auxiliary contact outputs provide hardwired status signals that can be wired into PLC digital input modules or remote I/O terminals. These signals are then transmitted over the plant network — via PROFIBUS, DeviceNet, EtherNet/IP, or Modbus — to SCADA servers and HMI panels, enabling real-time remote monitoring of contactor run/stop status, fault conditions, and cycle counts.

Q2: Is the SC-1N compatible with Fuji Electric FRENIC series VFDs and MICREX-SX PLCs?Yes. The SC-1N is designed for use within Fuji Electric's SC Series motor control ecosystem and is fully compatible with MICREX-SX PLC digital output modules for coil control. It is also widely used as a bypass or isolation contactor in FRENIC series VFD installations, where PLC sequencing logic coordinates safe motor switching during drive maintenance or fault bypass operations.

Q3: How does the SC-1N support network stability and communication reliability in smart factory environments?The SC-1N contributes to network stability by providing deterministic, hardware-level switching with auxiliary contact confirmation — eliminating ambiguity in motor status reporting. When integrated with managed industrial Ethernet switches and redundant PLC architectures, the SC-1N's status signals remain available even during partial network disruptions, supporting high-availability automation designs.

Q4: What warranty and pre-shipment testing does NANKMOS provide for the Fuji SC-1N?All Fuji SC-1N units supplied by NANKMOS are covered by a 12-Month Warranty from the date of shipment. Each unit undergoes pre-shipment functional testing to verify coil operation, auxiliary contact continuity, and insulation integrity before dispatch. In-stock inventory ensures short lead times for urgent project requirements. For technical support or order inquiries, contact [email protected] or +86 18359268345.