SEL-2594 Contact Transfer Module
Improve safety, signal integrity, and reliability by using optical fiber between protective relays and communications equipment. The SEL-2594 Contact Transfer Module provides secure, high-speed contact transfer through communications multiplexers, using the IEEE C37.94 Standard fiber-optic interface.
- Use compliant IEEE C37.94 Standard Fiber-Optic Interface
Complies with IEEE C37.94 Standard for optical connection to communications multiplexers. - Apply Easily
All settings are made with control switches. LEDs indicate the state of inputs, outputs, and the channel. - Operate at High Speed
Uses one 64-kb time-slot in a digital mulitplexer with communications time of 8 ms, including 0.5 ms of multiplexer throughput delay. - Improve Security
Digital error detection provides better security than audio tone equipment. - Improve Safety and Isolation
Fiber-optic connections provide isolation from dangerous ground potential rise, prevent induced electrical noise, and eliminate signal ground loops. Optoisolated inputs and contact outputs provide isolation for the field connections. - Operate Reliably under Extreme Conditions
Built to the same high standards as SEL protective relays, the SEL-2594 withstands vibration, electrical surges, fast transients, and extreme temperatures, meeting stringent industry standards. The printed circuit boards are conformal coated to provide an additional barrier to airborne contaminants such as hydrogen sulfide, chlorine, salt, and moisture.
- Use existing station communications paths with IEEE C37.94-compliant inputs to send permissive, blocking, and direct transfer trips between stations.
- Use the SEL-2594 to send transfer trips to and from electromechanical relays.
- Provide station alarm contacts to a central location for data acquisition, monitoring, or security systems.
Through a fiber-optic port, the SEL-2594 communicates with a remote multiplexor using ANSI C37.94 protocol. Each contact input control one remote output. Each of the eight receive bits controls an output contact. Use the transmitted contact input status for control and indication at the remote device. Use the remote device to control the SEL-2594 output contacts in trip, close, and other schemes.
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