- 11-pin plug-in.
- Relay de-energises to "centre-off" position for fail-to-safe operation.
- Adjustable Star Time Range to 60 sec.
- Fixed 75 ms pause time to prevent overlap of Star & Delta switching.
- LED indication of relay output status.
- Two internal DPDT relay method of interlocking ensuring break before make.
- 5A relay output.
- Requires optional S3-B 11-pin base.