Test MIRRORED BITS and Serial Communications Channels
The SEL-4388 gives engineers and technicians the power to accelerate commissioning and bench testing, and to improve cable identification, training, and maintenance.
Connect directly to EIA-232 MIRRORED BITS communications channels, or use the included EIA-232 extension cables
Connect to remote devices through fiber-optic MIRRORED BITS channels
Read sensed parameters from LCD display
Transmit MIRRORED BITS using pushbuttons
Observe LED status of eight bits sent in each direction
Power from an optional 230-0601 AC Power Adapter or a station-battery-powered SEL-9321 Low-Voltage DC Power Supply for bench testing or other applications where you don't need the portability provided by batteries.
Application Example
Technology Overview
MIRRORED BITS communications is an innovative, low-cost, relay-to-relay communications technology that sends internal logic status, encoded in a digital message, from one device to another. This technology opens the door to numerous protection, control, and monitoring applications that would otherwise require more expensive external communications equipment wired through contacts and control inputs. Applications for MIRRORED BITS communications include line protection pilot schemes, remote device control and monitoring, relay crosstripping, and more.
Included Accessories:
C602 straight-through EIA-232 serial cable
C603 null-modem EIA-232 serial cable
Two AAA batteries
Optional Accessories:
240-1551 M/M gender changer to convert the SEL-4388 connector from male to female.
Optional Accessories: 
