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Specification & Description
| Specification | Description |
|---|---|
| Part Number | 6NH9821-0BC11 |
| Alternative Part Number | 6NH98210BC11 |
| Manufacturer | Siemens |
| Transmission Paths | Private unspooled or spooled long-distance lines |
| Transformation Ratio | 1:1; +5% (e.g., 600/600 Ohm in the voice band) |
| Transmission Range | 300 Hz to 35 kHz |
| Attenuation | Dependent on frequency and transmission speed |
| Isolation Resistance | > 2000 MOhm |
| Test Voltage | 4 kV, 50 Hz, 10 sec |
| Surge Voltage Resistance | 6 kV/2 J according to EN 60 099-1 |
| Nominal Discharge Surge Current | 5 kA |
| Output Voltage Limitation | Approx. 15 V at nominal discharge surge current |
| Long-Distance Line Connection | Screw terminals X1 for rigid and flexible wires |
| Modem Connection | Screw terminals X2 and X3 or X6 (RJ12 socket for Western plug) |
| Installation Location | Preferably close to the cable entry into the building |
| Dimensions (H x W x D) | 90 x 75 x 110 mm |
| Weight | LTOP1: 300 g, LTOP2: 320 g, OPM: 10 g |
| Protection Class | IP20 |
| Mounting | DIN rail TS35 (35 mm; EN 50 022) |
The Siemens 6NH9821-0BC11 is a sophisticated line transformer with integrated overvoltage protection, designed to safeguard telecontrol communication networks. This essential component is adept at suppressing voltage surges, ensuring they remain at levels that are non-detrimental to sensitive electronic equipment. The device features a floating transformer that provides electrical isolation, which is crucial in preventing potential carry-over onto other sections of the line.
Engineered for reliability, the Siemens 6NH9821-0BC11 is an indispensable protective element for private telecontrol networks. It is equipped with a plug-in overvoltage protection module (OPM) that can be easily replaced without interrupting the telecontrol line, thus minimising downtime and maintenance efforts. The unit's design includes overvoltage suppressors, inductors, a metal oxide varistor, and a suppressor diode, all working in concert to provide comprehensive protection.
The device's versatility is evident in its ability to be used in various configurations, whether in single or dual unit arrangements within its housing. It is compatible with a range of modem connections and can be installed near the cable entry point of a building, making it a flexible solution for a variety of industrial settings.
With its robust construction and IP20 protection rating, the Siemens 6NH9821-0BC11 is built to withstand the rigours of industrial environments while providing a high level of protection against electrical disturbances. This line transformer with overvoltage protection is a testament to Siemens' commitment to quality and innovation in industrial automation and control.
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Frequently Asked Questions
What is the purpose of the Siemens Line Transformer with Overvoltage Protection?
The Siemens Line Transformer with Overvoltage Protection is designed to interface telecontrol equipment to a telecontrol line, providing electrical isolation and protection against voltage surges. This ensures reliable communication and extends the lifespan of the connected devices.
Can this line transformer be used for both 2-wire and 4-wire modem connections?
Yes, the line transformer is versatile and can be used for both 2-wire and 4-wire modem connections, making it suitable for a variety of telecontrol applications.
Is there any configuration required for the line transformer upon installation?
The line transformer comes with adjustment switches that may need to be configured based on the specific application and connection requirements. It is important to refer to the installation manual for proper setup.
What type of protection does the overvoltage module provide?
The overvoltage module provides protection against transient voltage spikes and surges, which can occur due to lightning strikes or power fluctuations, thereby safeguarding the telecontrol equipment.
How can multiple line transformers be integrated into a telecontrol system?
Multiple line transformers can be connected together if necessary for larger telecontrol systems. This allows for flexible and scalable configurations to meet the needs of various network sizes and complexities.
What are the typical applications for this line transformer?
Typical applications include industrial telecontrol systems, remote monitoring and control networks, and any other scenarios where telecommunication lines interface with control equipment requiring isolation and surge protection.
How does the line transformer connect to SINAUT ST7 modems?
The line transformer can be directly connected to SINAUT ST7 modems using the standard cross-connection cable supplied with the modems, which features RJ12 Western connectors for easy installation.
What are the physical characteristics of the line transformer?
The line transformer has a compact design suitable for DIN rail mounting, with dimensions of 90 x 75 x 110 mm and a weight of 300 g for the single module version (6NH9821-0BC11) and 320 g for the dual module version.
Does the line transformer require any special environmental conditions for operation?
The line transformer is designed to operate within standard industrial environmental conditions. However, it should be installed in a location that minimizes exposure to extreme temperatures, moisture, and mechanical stress.
What maintenance is required for the line transformer?
The line transformer is designed to be low-maintenance. However, it is recommended to periodically check the connections and the state of the overvoltage protection modules to ensure ongoing reliability and protection.
