Schweitzer Engineering Laboratories SEL-321 - Page 357

Date Code 20011203 Firmware Versions A-25
SEL-321/321-1 Instruction Manual
Firmware
Part/Revision No.
SEL-321-1 Relay Version
Description of Firmware
Revision A Main Board:
SEL-321-1 Relay includes SEL-321 Relay base
version plus:
- 51PTC setting which allow torque control of
phase time-overcurrent element by load
encroachment element.
- PULSE command to independently close
output contacts.
- Limited Multidrop (LMD) protocol.
- Fast Meter messages.
- Compressed ASCII commands.
- The CONTROL command which allows the
user to set, clear or pulse the new relay
elements RB1 - RB16.
SEL-321-1-R102 60 Hz, 5 Amp, 1 I/O Board, Rev. A
SEL-321-1-R152 50 Hz, 5 Amp, 1 I/O Board, Rev. A
SEL-321-1-R202 60 Hz, 5 Amp, 2 I/O Boards, Rev. A
Firmware
Part/Revision
No.
SEL-321 Relay Base Version
Description of Firmware
Revision A Main Board:
SEL-321-R100 Initial 321 Production Firmware Release, 60 Hz
SEL-321-R151 Initial 321 Production Firmware Release, 50 Hz
SEL-321-R200 Two I/O Board Support, 60 Hz