WEIDMULLER 8708680000 Industrial Power Supply

Product Details

8708680000 Product Description

The Weidmuller 8708680000 is a high-performance CP SNT series DIN rail power supply rated at 250W / 24VDC, engineered for continuous operation in demanding industrial environments. Far beyond a conventional power unit, the 8708680000 is designed as a foundational node in the smart factory power and data architecture — delivering stable, regulated DC power to field devices, PLC controllers, remote I/O modules, HMI panels, and edge gateways while supporting real-time status monitoring and remote diagnostics through integrated signalling interfaces.

In modern industrial automation, power supply health is a critical data point. Unplanned power failures cascade into production stoppages, alarm floods, and costly downtime. The Weidmuller 8708680000 addresses this by providing DC OK relay output and status signalling that feeds directly into SCADA supervisory systems and PLC diagnostic routines, enabling operators to monitor supply voltage, load current, and fault conditions from the control room without physical inspection of the panel.

In a fully connected smart factory, the Weidmuller 8708680000 sits at the heart of the 24VDC power distribution rail, supplying stable regulated power to every intelligent device in the automation chain. Consider a typical production line architecture: field sensors — including Sick proximity sensors, Balluff inductive sensors, and Turck RFID readers — draw their operating power from the 24VDC bus maintained by the 8708680000. These sensors feed real-time process signals into a Siemens S7-1500 PLC or Rockwell Automation ControlLogix controller via distributed remote I/O modules such as the Weidmuller UR20 series or Phoenix Contact Axioline F remote I/O stations.

The PLC processes these signals and communicates upstream via PROFINET or EtherNet/IP to a SCADA platform — such as Wonderware System Platform or Ignition by Inductive Automation — where operators visualise production KPIs, energy consumption, and equipment health on HMI panels. The HMI itself, whether a Siemens TP1200 Comfort or a Weintek cMT series panel, also draws its 24VDC operating power from the same CP SNT power rail supplied by the 8708680000.

At the network layer, industrial Ethernet switches — such as the Hirschmann SPIDER series or Moxa EDS-400 series — aggregate device-level Ethernet connections and uplink to the plant network backbone. These switches require stable 24VDC input, making the reliability of the Weidmuller 8708680000 directly critical to network uptime. Edge gateways — such as the Moxa UC-8100 or Advantech WISE-5000 series — bridge OT field data to IT cloud platforms via MQTT or OPC-UA, and these too depend on the 24VDC rail for uninterrupted operation.

The DC OK relay output of the 8708680000 is wired to a digital input on the PLC or a Weidmuller ACT20P signal conditioner, enabling the controller to detect power supply degradation before a full failure occurs. This signal is mapped in the SCADA system as a health alarm tag, triggering maintenance notifications and logging fault timestamps for root cause analysis. In multi-supply panel designs, redundant 8708680000 units can be paralleled using Weidmuller diode modules to achieve N+1 redundancy, ensuring zero-interruption power delivery to critical automation nodes.

Variable frequency drives — such as the ABB ACS880 or Siemens SINAMICS G120 — controlling conveyor motors and pump systems also rely on 24VDC control power for their control boards and fieldbus communication cards. The 8708680000 provides this auxiliary supply, ensuring that drive communication over PROFIBUS DP or PROFINET remains stable even during motor start transients. The result is a seamless data flow from field device to cloud analytics, with the Weidmuller 8708680000 as the silent but essential power backbone.

Many industrial sites operate with aging power infrastructure that lacks any form of health monitoring, creating invisible data gaps in the automation architecture. When a power supply fails silently, the downstream effect — lost sensor signals, PLC I/O faults, HMI dropouts, and network switch reboots — is often misdiagnosed as a device or software fault, wasting hours of engineering time.

The Weidmuller 8708680000 eliminates this blind spot by providing a hardwired DC OK status signal that integrates directly into the PLC diagnostic program. Maintenance teams can configure threshold alarms in the SCADA system to alert on voltage deviation before a failure occurs, enabling predictive maintenance rather than reactive repair. For sites implementing IIoT data collection, the power supply status can be logged as a time-series data point in historian platforms such as OSIsoft PI or InfluxDB, enabling trend analysis and mean-time-between-failure (MTBF) calculations.

Protocol fragmentation is another common challenge: older field devices may communicate over RS-485 Modbus RTU while newer equipment uses PROFINET or EtherNet/IP. The 8708680000 powers the protocol gateways — such as the Anybus X-gateway or HMS IXXAT series — that bridge these protocol islands, enabling unified data visibility across the SCADA layer without replacing legacy equipment. This approach dramatically reduces integration cost while accelerating the path to full production line transparency.

For remote sites and unmanned substations, the 8708680000's status relay enables remote monitoring via RTU or edge gateway, allowing central operations teams to detect power anomalies across geographically distributed assets without dispatching field engineers. Alarm data is routed through the plant network to the SCADA alarm management system, where it is prioritised, acknowledged, and tracked through to resolution — closing the loop on remote diagnostics and reducing mean time to repair (MTTR).

Q1: Can the Weidmuller 8708680000 integrate with SCADA and PLC alarm systems for remote monitoring?Yes. The 8708680000 provides a DC OK relay contact output that can be wired to any PLC digital input or SCADA RTU. This enables real-time power supply health monitoring, alarm generation on voltage deviation, and fault logging in historian systems — all without additional hardware beyond standard wiring.

Q2: Is the 8708680000 compatible with PROFINET, EtherNet/IP, and Modbus TCP network architectures?The 8708680000 itself is a power supply, not a fieldbus device. However, it powers the PLCs, gateways, switches, and I/O modules that communicate over PROFINET, EtherNet/IP, Modbus TCP, and other industrial protocols. Its DC OK signal integrates into PLC I/O for system-level protocol-based monitoring. It is fully compatible with 24VDC bus architectures used in all major industrial network topologies.

Q3: What is the warranty coverage and pre-shipment testing policy for the 8708680000?Every Weidmuller 8708680000 unit supplied by NANKMOS carries a 12-month warranty from the date of shipment. Each unit undergoes pre-shipment functional testing — including output voltage verification, load regulation check, and DC OK relay function test — before dispatch. In-stock units are available for same-week shipment to minimise production downtime.

Q4: Can multiple 8708680000 units be used in parallel for redundant power supply configurations?Yes. The CP SNT series supports parallel redundant operation using Weidmuller diode decoupling modules, enabling N+1 redundancy for critical automation panels. This configuration is recommended for SCADA servers, industrial Ethernet switches, and edge gateway power rails where continuous uptime is mandatory. The DC OK relay from each unit can be independently monitored by the PLC to detect individual supply degradation in real time.