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Specification & Description
| Specification | Description |
|---|---|
| Part Number | 6NH9821-0BB00 |
| Alternative Part Number | 6NH98210BB00 |
| 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 |
| Damping | Frequency-dependent |
| Isolation Resistance | > 2000 MOhm |
| Test Voltage | 4 kV, 50 Hz, 10 sec. |
| Impulse Withstand Voltage | 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 |
| Telecontrol Line Connection | Screw terminals X1 - Cross-section 0.2 – 4 mm² for solid wires, 0.2 – 2.5 mm² for flexible wires |
| Modem Connection | Screw terminals X2 and X3 (Wire cross-section as X1) 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 6NH9821-0BB00 is a state-of-the-art overvoltage protection module designed to safeguard telecommunication and control systems from voltage surges and spikes. This plug-in module is an essential component for any private telecontrol network, ensuring the integrity and reliability of communication lines.
Crafted with precision, the 6NH9821-0BB00 module is part of the LTOP product family, which stands for Line Transformer with Overvoltage Protection. It is engineered to provide both coarse and fine protection against overvoltages, which can be caused by lightning strikes or power surges. The module's design includes gas-filled surge suppressors, inductors to limit current spikes, a metal oxide varistor for fine protection, and a transformer for electrical decoupling.
The 6NH9821-0BB00 is particularly noted for its ability to suppress voltage surges down to non-critical levels before they can reach and potentially damage sensitive electronic equipment. By electrically segmenting the network, it prevents the carry-over of external potentials, thereby limiting damage to the affected segment only.
This module is designed for easy installation on a DIN rail and can be replaced without interrupting the telecontrol line, making maintenance straightforward and minimising downtime. Its compact dimensions and lightweight design make it suitable for installation in a variety of settings, particularly where space is at a premium.
The Siemens 6NH9821-0BB00 is a robust solution for maintaining the performance and safety of your telecontrol systems, ensuring that your operations run smoothly and without interruption due to electrical disturbances.
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Frequently Asked Questions
What is the purpose of this Siemens line transformer with overvoltage protection?
The Siemens line transformer with overvoltage protection is designed to suppress voltage surges and provide electrical isolation in telecontrol networks. It protects sensitive electronic equipment from overvoltages and prevents potential carry-over onto other sections of the line.
Can this device be used with private telecontrol lines?
Yes, it is suitable for use with private coiled or uncoiled telecontrol lines, providing protection and ensuring reliable operation within these networks.
What is the transmission range of this line transformer?
The transmission range of the line transformer spans from 300 Hz to 35 kHz, accommodating a broad spectrum of telecontrol communication frequencies.
How is the overvoltage protection module replaced?
The overvoltage protection module, or OPM, is designed as a plug-in component, which allows for easy replacement without interrupting the telecontrol line.
What are the mounting requirements for this line transformer?
The line transformer should be mounted as close as possible to the cable inlet to the building. It is designed for assembly on a DIN rail TS35 (35 mm; EN 50 022).
What type of connections does this line transformer support?
It supports screw terminals for telecontrol line connections and modem connections, as well as an RJ12 socket for Western plugs.
What is the degree of protection provided by this device?
The line transformer is rated with a degree of protection IP20, indicating protection against solid objects larger than 12.5 mm but not against water.
What is the nominal impulse discharge current specification?
The nominal impulse discharge current, denoted as i_sn (8/20 µs), is rated at 5 kA, indicating its capacity to withstand impulse currents.
How often should the overvoltage protection module be replaced?
It is recommended to replace the OPM approximately every year, or every six months in areas prone to frequent lightning or surges, to ensure continued protection.
What are the dimensions and weight of this line transformer?
The dimensions are 90 x 75 x 110 mm, with the LTOP1 variant weighing 300 g and the LTOP2 variant weighing 320 g.
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