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Phone：+86 17062388866Description
The Timek ARND-4195A is a compact, DIN rail-mounted DC redundancy module engineered to provide fail-safe power distribution for critical industrial control systems operating on 24V DC. Designed for seamless integration into PLC panels, remote I/O cabinets, and SCADA field stations, the Timek ARND-4195A enables two independent 24V power supplies to feed a single load bus with automatic switchover in the event of a supply failure or fuse blowout. This ensures continuous operation of sensitive electronics such as controllers, network switches, and safety relays—eliminating costly unplanned downtime.
As part of Timek’s industrial power management portfolio, the Timek ARND-4195A leverages diode-based ORing technology to isolate input sources while allowing balanced current sharing under normal conditions. Its narrow 22.5 mm housing occupies only one standard DIN rail module width, making it ideal for space-constrained applications where panel real estate is at a premium. With built-in visual diagnostics (dual-color LEDs) and an optional alarm relay output, the Timek ARND-4195A delivers both functional reliability and operational transparency, positioning it as a cost-effective yet robust solution for non-safety-critical redundancy requirements across manufacturing, utilities, and process industries.
Technical Specifications
| Parameter Name | Parameter Value |
| Product Model | ARND-4195A |
| Manufacturer | Timek |
| Product Type | DC Redundancy / Power Decoupling Module |
| Input Voltage Range | 20–30 V DC (dual independent inputs) |
| Maximum Output Current | 5 A continuous (shared load) |
| Maximum Output Power | 120 W (24 V × 5 A) |
| Redundancy Method | Diode-based ORing with low forward voltage drop |
| Mounting | 35 mm DIN rail (TS-35/7.5 or TS-35/15 compliant) |
| Operating Temperature | –25°C to +60°C |
| Protection Features | Reverse polarity, short-circuit, overload, thermal shutdown |
| Fuse Rating | 5 A or 6.3 A fast-acting (replaceable, 5×20 mm typical) |
| Dimensions (W×H×D) | 22.5 mm × 100 mm × 115 mm |
Main Features and Advantages
Space-efficient reliability: The Timek ARND-4195A’s ultra-compact 22.5 mm width allows it to fit into densely packed control cabinets without requiring panel redesign—making it especially valuable in machine retrofits or modular skid systems where every millimeter counts. Despite its small footprint, it delivers full 5A redundancy performance without derating under standard ambient conditions.
Intelligent fault indication: Equipped with dual-status LEDs, the Timek ARND-4195A provides immediate visual feedback—green indicates healthy power from both inputs, while red illuminates when a fuse blows or input voltage is lost on either channel. Optional models include a dry-contact alarm relay that can be wired to a PLC digital input for automated fault logging and remote notification, enabling predictive maintenance strategies.
Universal compatibility and ease of use: Unlike proprietary redundancy systems, the Timek ARND-4195A works with any brand of 24V switch-mode power supply (e.g., Mean Well, Siemens SITOP, ABB CP-E), eliminating vendor lock-in and simplifying spare parts inventory. Installation requires no configuration—simply connect two power sources and the load, and the module handles isolation and failover autonomously.
Robust protection architecture: Beyond redundancy, the Timek ARND-4195A incorporates multiple layers of protection, including reverse polarity prevention and thermal shutdown, ensuring that wiring errors or field faults do not cascade into system-wide failures. This makes it particularly suitable for harsh environments such as wastewater lift stations, packaging lines, or outdoor enclosures exposed to temperature extremes and electrical noise.
Application Field
The Timek ARND-4195A is widely used in small to mid-scale automation systems where uninterrupted 24V power is essential but budget constraints rule out premium-brand redundancy solutions. In food and beverage packaging lines, it powers photoelectric sensors, valve terminals, and compact PLCs (e.g., Allen-Bradley Micro850), ensuring production continues even if one SMPS fails during high-speed operation. In municipal water pumping stations, the Timek ARND-4195A maintains communication with RTUs and level transmitters during grid fluctuations or generator transitions, supporting reliable telemetry and remote control.
Within HVAC and building management systems, the Timek ARND-4195A safeguards BACnet MS/TP controllers and damper actuators from single-point power failures—critical for maintaining environmental compliance in laboratories or data centers. Similarly, in renewable energy applications such as solar combiner boxes or battery monitoring units, it ensures continuous data acquisition from string inverters and charge controllers. For OEMs designing standardized control panels, the Timek ARND-4195A offers a consistent, certified redundancy block that meets CE and RoHS requirements while keeping bill-of-materials costs competitive. Across all these scenarios, the Timek ARND-4195A delivers enterprise-grade uptime assurance at an accessible price point.
Related Products
ARND-4199A: Higher-current (10A) version of the same series; choose ARND-4195A for loads ≤5A to save cost and space.
APS-2405: Timek’s 24V/5A DIN rail power supply—ideal matched pair for building a complete redundant power system with ARND-4195A.
APS-2410: 10A power supply often used with ARND-4199A, but can also back up ARND-4195A in asymmetric configurations.
Phoenix Contact MINI MCR-ORING/24DC/5: Premium alternative with active MOSFET balancing and lower power loss; ARND-4195A offers comparable function at lower cost.
Weidmüller PWR RMD 24V/5A: High-efficiency redundancy module with advanced diagnostics; ARND-4195A serves as a value-engineered option.
TBUS-4195-FUSE: Dedicated fuse holder accessory (if applicable) for rapid replacement in ARND-4195A installations.
