Difference between revisions of "DF11 Communications Line Adapter"

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A DF11 usually involves two [[DEC card form factor|single-width]] cards, one holding the circuitry needed, and the other providing, sometimes with a cable plugged into a [[Berg connector]], the interface connector. At least one dual-width adapter (the DF11-B) existed, though.
 
A DF11 usually involves two [[DEC card form factor|single-width]] cards, one holding the circuitry needed, and the other providing, sometimes with a cable plugged into a [[Berg connector]], the interface connector. At least one dual-width adapter (the DF11-B) existed, though.
  
The DF11 plugs into a common [[backplane]] with the serial interface. DF11's are used with [[DC11]], [[DP11]], [[DH11 asynchronous serial line interface|DH11]], and [[DL11 asynchronous serial line interface|DL11]] [[UNIBUS]] serial interfaces (the latter only in [[DD11-B backplane]]s). They may also be used in some versions of the [[PDP-11/05]] or [[PDP-11/10]].
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The DF11 plugs into a common [[backplane]] with the serial interface. DF11's are used with [[DP11-A synchronous serial line interface|DP11]], [[DM11 asynchronous serial line interface|DM11]], [[DH11 asynchronous serial line interface|DH11]], [[DC11 asynchronous serial line interface|DC11]], and [[DL11 asynchronous serial line interface|DL11]] [[UNIBUS]] serial interfaces (the latter only in [[DD11-B backplane]]s). They may also be used in some versions of the [[PDP-11/05]] or [[PDP-11/10]].
  
 
DF11 models include:
 
DF11 models include:

Revision as of 16:08, 30 September 2019

The DF11 Communications Line Adapter performs two functions for serial line communication interfaces on PDP-11 computers: i) converts from TTL signal levels to the voltages, etc needed by a given serial line standard, and ii) produces the physical connector needed for that standard.

A DF11 usually involves two single-width cards, one holding the circuitry needed, and the other providing, sometimes with a cable plugged into a Berg connector, the interface connector. At least one dual-width adapter (the DF11-B) existed, though.

The DF11 plugs into a common backplane with the serial interface. DF11's are used with DP11, DM11, DH11, DC11, and DL11 UNIBUS serial interfaces (the latter only in DD11-B backplanes). They may also be used in some versions of the PDP-11/05 or PDP-11/10.

DF11 models include:

  • DF11-A (M594, M957-BC01R) - EIA RS-232 adapter
  • DF11-BA (M586) - integral modem for connection to a telephone line
  • DF11-BB (M587) - integral answer-only modem
  • DF11-F (M596?, M973)- 20m current loop adapter (up to 300 baud)
  • DF11-G - (M595, BC01T-BC01Y) custom interface to a Bell 301/303 modem
  • DF11-K (M598, M973) - 4-wire opto-isolated 20mA adapter (up to 2400 baud)