TheIBM 3505is a reader for 80-columnpunched cards.It can read cards punched inEBCDICorcolumn binaryat up to 1200 cards per minute (CPM). TheIBM 3525is a multi-function punched card device, capable of reading, punching, and printing on punched cards. The 3505 contains an integrated control unit that attaches to aSystem/370byte multiplexer, selector, or block multiplexerchannel.[1]An optional feature of the 3505 allows the control unit to also control a 3525, although the two are separately-addressed devices.[2]
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| Type | Punched card readerand controller (3505) Punched card reader/punch (3525) |
|---|---|
| Release date | 1971 |
| Predecessor | IBM 2540 |
The 3505/3525 units attach to aSystem/370 Model 135and up, or to aSystem/360 Model 195.[1]
The 3505 and 3525 were developed at the IBM General Systems Division inRochester, Minnesotain 1971.[3]
3505
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The 3505 is a card reader and controller for optional 3525.
The 3505 features a 3000-card input hopper and two 1750-card output stackers. When one stacker becomes full the reader automatically switches to the other, if available, to allow the operator to unload the cards without stopping the machine. A third stacker was available as an option. Cards are read optically. The 3505 model B1 reads cards at up to 1200 CPM, the B2 at up to 800 CPM.
An optional feature of the 3505 was available to allow the 3505 to readoptically-markedcards. The "read column eliminate" option allows the reader to ignore data punched in selected columns, including data that would normally cause an error.[4]
3525
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The 3525 attaches to a computer through a control unit in the 3505.
It has an input hopper with a capacity of 1200 cards, and two output stackers, each holding up to 1200 cards. Cards may be selected into either stacker under program control. A full stacker stops the punch, awaiting operator intervention. A third stacker, the "reject stacker", receives cards that were punched incorrectly. The reject stacker holds up to 200 cards. The 3525 model P1 punches at 100 CPM, the P2 at 200 CPM, and the P3 at 300 CPM.
Optionally, the 3525 has a read feature that can read cards prior to punching. An optional print feature allows the 3525 to print on cards following reading or punching. Up to 25 lines of 64 characters can be printed, using an interchangeable 64-character set.[4]
References
edit- ^abIBM Corporation (1972).A Guide to the IBM System/370 Model 145(PDF).p. 128.RetrievedDec 29,2018.
- ^IBM Corporation.IBM 3505 Card Reader IBM 2525 Card Punch(PDF).RetrievedDec 28,2018.
- ^IBM Corporation."IBM Rochester @50"(PDF).Charles Babbage Institute.RetrievedDec 28,2018.
- ^abIBM Coropration (March 1971).IBM 3505 Card Reader and IBM 3525 Card Punch Subsystem.RetrievedDec 28,2018.