NEC completed the 542 magnetic tape unit in May 1959, and delivered it to the Japanese Electronic Industry Development Association (JEIDA) together with the first production unit of the NEAC-2203. This magnetic tape unit was used for the NEAC-2203 and the NEAC-1103, which was an improved version of the NEAC-1102 (SENAC-1).
The tape shock absorber mechanism for this equipment was the tension arm type.
| Magnetic tape | Width (mm) | 12.7 |
|---|---|---|
| Length (m) | 760 | |
| Number of tracks | 8 | |
| Tape running speed (m/s) | 2 | |
| Tape rewind speed (m/s) | 4 | |
| Start/stop time (msec) | 5 | |
| Information recording density(bit/mm) | 4 | |
| Information transfer speed (char (BCD)/s) | 8,000 | |
| Application | NEAC-2203,NEAC-1103 | |
