Introduction

Hardware Outputs

Analog (0 to 10V)

Cooling valve actuator

Face-bypass damper actuator

Heating valve actuator

Outdoor air damper actuator

Digital

Auxiliary radiation electric coil contact; or, auxiliary radiation two-position valve actuator

Unit fan

First stage electric heat

Second stage electric heat

Third stage electric heat

Two-position cooling valve actuator

Two-position heating valve actuator

DX coil

Power Wiring

Application

2281, 2283, 2287 2281, 2283, 2284, 2286

2281, 2283, 2284, 2286, 2287 2281, 2283, 2284, 2286

Application

2281, 2283, 2284, 2286

2281, 2283, 2284, 2286, 2287 2281, 2283, 2284, 2286 2281, 2283, 2284, 2286 2281, 2283, 2284, 2286 2281, 2283, 2284, 2286 2281, 2283, 2284, 2286 2284, 2286, 2287

The controller is powered by 24 Vac and connects to the two screw terminals on the controller. Labeled “C” (Common) and “H” (Hot) on the terminal block labeled “24 VAC”. No earth-ground connection is required (Figure 2).

Communication Wiring

The controller connects to the field panel by means of a Floor Level Network (FLN) trunk. Communication wiring connects to the three screw terminals on the controller labeled “+” (positive), “-“ (negative), and “S” (Shield) (Figure 3).

Siemens Building Technologies, Inc.

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Siemens 125-1957 owner manual Hardware Outputs, Analog 0 to, Power Wiring, Communication Wiring

125-1957 specifications

Siemens 125-1957, a notable creation of the German engineering giant Siemens, is recognized for its innovative design and advanced technology in the realm of electrical engineering. This model is emblematic of the mid-20th century's commitment to optimizing electrical machinery for industrial applications, contributing to enhanced productivity and efficiency.

One of the main features of the Siemens 125-1957 is its robust construction, designed to withstand the demanding environments of industrial settings. The body of the machine is built from high-grade materials, ensuring durability and longevity. It is also designed to minimize vibration and noise during operation, thus enhancing the user experience.

Technologically, the Siemens 125-1957 incorporates advanced electric motor technology, which provides reliable performance across a variety of applications. The motor is designed for high efficiency, allowing it to operate effectively under load while consuming less energy. This efficiency is crucial in industrial applications where operational costs are significant. The motor is also equipped with thermally protected windings, which prevent overheating and extend the service life of the equipment.

The 125-1957 model is characterized by its adaptability in various operational settings. It is compatible with a range of automation systems, making it a versatile choice for factories and production lines. Its design allows for easy integration with existing equipment, minimizing downtime during installation.

Moreover, the Siemens 125-1957 boasts a user-friendly interface, making it accessible for operators with varying levels of expertise. It comes with comprehensive safety features, including circuit protection and emergency stops, ensuring that it meets the strict industrial safety standards.

In summary, the Siemens 125-1957 represents a blend of robust design, advanced motor technology, and user-oriented features. With its energy-efficient performance and adaptability, it stands out as a key asset in industrial electrical engineering, demonstrating Siemens' commitment to innovation and quality in the manufacturing sector. This model continues to be relevant, supporting various industries in their pursuit of efficiency and reliability.