Schweitzer Engineering Laboratories SEL-4388 Mirrored Bits Tester

Portable tester for commissioning and troubleshooting SEL Mirrored Bits communications links.

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Description

Check link addressing, detected data rate, and transmit/receive bit states during relay commissioning or bench testing. Front-panel pushbuttons let technicians simulate transmitted bits, while the LCD and LEDs provide immediate link feedback. Battery operation supports work at the relay panel without a separate power supply.

Key Specifications

  • Protocols: MB (MBA/MBB) and MB8
  • Serial data rate: 2400–38400 bps
  • Bit indication: Eight receive and eight transmit bits
  • Power: Two AAA batteries or 4–18 VDC external input
  • Operating temperature: 0–45 °C