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Mini-Centronics 36-pin male connector (top) with Micro ribbon 36-pin male Centronics connector (bottom) The Apple II Parallel Printer Port connected to the printer via a folded ribbon cable; one end connected to the connector at the top of the card, and the other end had a 36-pin Centronics connector.
The most common usage is the DB25, using TASCAM's pinout (now standardised in AES59 by the Audio Engineering Society [1]). To avoid the possibility of bent pins on fixed equipment, the male connector is generally fitted to the cabling and the female connector to the equipment.
For example, DB-25 denotes a D-sub with a 25-position shell size and a 25-position contact configuration. The contacts in each row of these connectors are spaced 326/3000 of an inch apart, or approximately 0.1087 inches (2.76 mm), and the rows are spaced 0.112 inches (2.84 mm) apart; the pins in the two rows are offset by half the distance ...
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Currently known as TIA-530-A, but often called EIA-530, or RS-530, is a balanced serial interface standard that generally uses a 25-pin connector, originally created by the Telecommunications Industry Association. Finalized in 1987 (revision A finalized in 1992 [1]), the specification defines the cable between the DTE and DCE devices.
Male pinout of a 25-pin serial port (D-subminiature, DB-25) commonly found on 1980s computers. The following table lists commonly used RS-232 signals (called "circuits" in the specifications) and their pin assignments on the recommended DB-25 connectors [14] (see Serial port pinouts for other commonly used connectors not defined by the standard).
The DB-25 connector includes a second Protective Ground on pin 1, which is intended to be connected by each device to its own frame ground or similar. Connecting Protective Ground to Signal Ground is a common practice but not recommended.
So to send the digit 9, pins 14 (1) and 17 (8) would be put to the "mark" state, whereas the digit 6 would mark pins 15 and 16. With each digit, the host system data terminal equipment (DTE, typically a computer) would raise pin 2 to indicate the digit was ready for the dialler to read. When the dialler completed the read, it would raise pin 5 ...