Why Choose the ABB OVR SL15 Data and Signal Surge Protection Device?
The ABB OVR SL15, order code 7TCA085400R0361, is a compact data and signal line surge protection device (SPD) designed to protect sensitive electronic equipment connected to two-wire signal, control and communication circuits. Part of the ABB OVR SL Series, it provides full-mode transient protection in an ultra-slim DIN-rail-mounted format.
Designed for circuits with a nominal voltage of 15 V, the OVR SL15 has a maximum continuous working voltage (Uc) of 16.7 V DC or 11 V AC RMS. Its high bandwidth and low in-line resistance make it suitable for signal and data applications where effective surge suppression must be achieved without unnecessarily degrading normal communications.
The OVR SL15 provides a maximum surge-current capability of 5 kA per signal wire and 10 kA per pair for an 8/20 µs waveform, together with D1 lightning-current withstand capability of 1.25 kA per signal wire and 2.5 kA per pair using a 10/350 µs waveform. Its 7 mm-wide housing makes efficient use of valuable DIN-rail space in control and communications cabinets.
Key Advantages
- Purpose-designed surge protection for two-wire data and signal circuits.
- 15 V nominal voltage for low-voltage signalling applications.
- Maximum working voltage of 16.7 V DC / 11 V AC RMS.
- Handles up to 5 kA per signal wire and 10 kA per pair with an 8/20 µs surge waveform.
- Provides full-mode protection between signal conductors and earth.
- Fast transient response of less than 10 ns.
- High 45 MHz bandwidth supports high-frequency data and signal transmission.
- Ultra-slim 7 mm DIN-rail housing minimises panel space requirements.
Key Features
- ABB OVR SL15 data and signal SPD.
- Designed for two-wire signal lines.
- 15 V nominal voltage.
- 16.7 V DC maximum working voltage.
- 11 V AC RMS maximum working voltage.
- 750 mA signal current rating.
- 1.0 Ω in-line resistance per line.
- 45 MHz bandwidth in a 50 Ω system.
- 38.4 V C2 let-through voltage.
- 29.4 V C1 let-through voltage.
- 26.8 V B2 let-through voltage.
- Operating temperature range of -40 to +80 °C.
- DIN-rail mounting with earth connection through the DIN rail or dedicated earth terminal.
Reliable Surge Protection for Data and Signal Circuits
Long signal and communication cables can provide a path for transient overvoltages caused by lightning activity, electromagnetic coupling and electrical switching events. These transients can damage sensitive interfaces, controllers, instrumentation and communication equipment even when the main electrical power supply has separate surge protection.
The ABB OVR SL15 is installed in series with the protected two-wire circuit and provides protection between the conductors as well as between the conductors and earth. Its low resistance, high bandwidth and fast response make it suitable for protecting signal circuits while maintaining normal data transmission, and the screen terminal allows a cable screen to be conveniently connected to earth where required.
Typical Applications
- Two-wire data and signal circuits.
- Process control and industrial instrumentation.
- High-speed digital communication equipment.
- PLC and automation signal interfaces.
- Monitoring and measurement circuits.
- Systems incorporating long external signal cables.
- Sensitive electronic equipment requiring low-voltage signal-line surge protection.
