The SEL-2506 Rack-Mount Remote I/O Module has eight digital inputs, eight digital outputs, and a fiber-optic communications port. Connect an SEL-2506 to a fiber-optic port or transceiver on a protective relay to add digital I/O. Or, wire the SEL-2506 I/O to relay I/O to add SEL Mirrored Bits teleprotection.
Protection and Monitoring—Add simple bus protection using contact inputs and outputs from existing relays. Provide secure pilot communications for existing two- and three-terminal line applications. Add local or remote trip- and close-coil monitoring capability.
I/O Contact Expansion—Economically extend the number of I/O contacts on SEL relays that are Mirrored Bits communications-compatible.
Comprehensive Device Compatibility—Add Mirrored Bits communications to any protective relay (digital or electromechanical) or other intelligent electronic devices (IEDs) for advanced communications-based protection.
Enhanced System Reliability—Reduce or eliminate ground potential rise between IEDs by using fiber-optic links instead of conventional switchboard wiring.
Protection and Monitoring
Add simple bus protection using contact inputs and outputs from existing relays. Add secure pilot communications to existing two- and three-terminal line applications. Add local or remote trip- and close-coil monitoring capability.
Allow clear indication of system function and status.
Expand the I/O of SEL relays that are Mirrored Bits-compatible.
Flexible Fiber-Optic Communications
Built-in bidirectional fiber-optic port. Ordering options provide operating ranges from 500 meters to 110 kilometers and compatibility with a variety of SEL fiber-optic transceivers and fiber types (see Table 1).
Replace control wiring to outside cabinets with fiber-optic cable to eliminate paths for dangerous voltages. All I/O terminals are behind the panel.
Use the communications monitoring feature to alarm when fiber-optic control cabling has been damaged, disturbed, or altered. Fiber-optic links are far less susceptible to electrical interference.
Easy Installation and Service
Install the rack-mount, compact two-rack-unit chassis. The SEL-2506 includes screw-terminal connector (STC) blocks for easy replacement of the unit.
|Transceiver Compatibility||Connectors||Fiber||Distance (km)||SEL Fiber-Optic Cable|
|SEL-2800 Fiber-Optic Transceivers||V-System||Multi-mode||0 to 1/2||SEL-C805|
|SEL-2815 Fiber-Optic Transceivers/Modems||ST||Multi-Mode||2 to 15*||SEL-C807, SEL-C808|
|SEL-2830 Single-Mode Fiber-Optic Transceivers/Modems||ST||Single-mode||16 to 80*||SEL-C809|
|SEL-2812 Fiber-Optic Transceivers With IRIG-B||ST||Multi-mode||0 to 4||SEL-C807, SEL-C808|
*For distances below the minimum, use attenuators on the Transmit fiber.
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