Schweitzer Engineering Laboratories SEL-321 - Page 336

A-4 Firmware Versions Date Code 20011203
SEL-321/321-1 Instruction Manual
Firmware
Part/Revision
No.
SEL-321 Relay Base Version
Description of Firmware
Revision B or C Main Board and Low-Level Test Capability
(ET3 or TT3):
This firmware differs from previous versions as follows:
- Fixed negative-sequence targeting (Q target).
- Fixed SHO L command when used with the 12-point I/O
board.
- Add 4800 baud selection to the communications port data
rate.
- Fixed 50HH targeting.
- Fixed double prompt when entering <CTRL> X.
SEL-321-R407 60 Hz, 5 Amp, 1 I/O Board
SEL-321-R457 50 Hz, 5 Amp, 1 I/O Board
SEL-321-R506 60 Hz, 5 Amp, 2 I/O Boards
SEL-321-R556 50 Hz, 5 Amp, 2 I/O Boards
SEL-321-R606 60 Hz, 5 Amp, 1 I/O Board, ACB Rotation
SEL-321-R706 60 Hz, 5 Amp, 2 I/O Boards, ACB Rotation
SEL-321-R805 60 Hz, 1 Amp, 1 I/O Board
SEL-321-R856 50 Hz, 1 Amp, 1 I/O Board
SEL-321-R905 60 Hz, 1 Amp, 2 I/O Boards
SEL-321-R954 50 Hz, 1 Amp, 2 I/O Boards
This firmware differs from previous versions as follows:
- Fixed UBEND and UBDURD DCUB timers.
SEL-321-R406 60 Hz, 5 Amp, 1 I/O Board
SEL-321-R456 50 Hz, 5 Amp, 1 I/O Board
SEL-321-R505 60 Hz, 5 Amp, 2 I/O Boards
SEL-321-R555 50 Hz, 5 Amp, 2 I/O Boards
SEL-321-R605 60 Hz, 5 Amp, 1 I/O Board, ACB Rotation
SEL-321-R705 60 Hz, 5 Amp, 2 I/O Boards, ACB Rotation
SEL-321-R804 60 Hz, 1 Amp, 1 I/O Board
SEL-321-R855 50 Hz, 1 Amp, 1 I/O Board
SEL-321-R904 60 Hz, 1 Amp, 2 I/O Boards
SEL-321-R953 50 Hz, 1 Amp, 2 I/O Boards