Siemens AS 235 Mini floppy disk unit 6DS3 900-8AE, Floppy disks, For archiving user data

This catalog is out of date, see note on page 1

Input and output devices

		Configuring unit
		Mini floppy disk unit
￿	Technical data
	Data medium	Floppy disk; 5,25 inch
	Data capacity	1.2 Mbytes
	Data transfer rate	300 kbits/s
	Power supply	DC 24 V (20 to 33 V);
		approx. 0.52 A;
		approx. 0,74 A during motor
		startup for 400 ms
	Permissible ambient temperature
	– Operation	+10 to +40 °C
	– Storage	-20 to +65 °C
	Permissible relative humidity	20 to 80 %, no condensation
	Vibration resistance
	– Operation	< 55 Hz, < 0.5 g
		55 to 500 Hz, < 0.25 g
	– Transport and storage	< 100 Hz, < 2 g
	Dimensions (H x W x D) in mm	120 x 180 x 320
	Weight	Approx. 3 kg

Fig. 5/6 Mini floppy disk unit

Mini floppy disk unit

￿The mini floppy disk unit is required for booting, loading and archiving the RAM contents of an AS 235 using floppy disks.

The mini floppy disk unit is a desktop unit with 3-m long connec- tion cables for data transmission and power supply.

The data media are 5.25" floppy disks, double sided, high den- sity (DS-HD).

Mode of operation

The drive interface of the mini floppy disk unit is matched to the central processing unit by the interface module. The data are exchanged sector by sector by direct memory access (DMA). This ensures rapid data access and little loading on the central processor.

Since the drive of the mini floppy disk unit is not equipped with a head load function, the read/write head always rests on the floppy disk when the drive is locked using the lever. To prevent high wear and possible damage to the read/write head or the floppy disk during permanent operation, the lever should either be opened immediately following an archiving or loading proce- dure, or the floppy disk should be removed.

￿	Ordering data	Order No.
	Mini floppy disk unit	6DS3 900-8AE
	with connection cables for data
	transmission and power supply,
	3 m each
	Floppy disks	5.25" floppy disk, DS-HD,
	for archiving user data	IBM-compatible,
		unformatted
	Obtainable from computer
	suppliers
	e.g. MAXELL disk,	obtainable from
	order no. 555081	MAXELL Europe GmbH
		D-40670 Meerbusch

￿

Siemens PLT 111 · 1999 5/9