Configurations (Terminals)
--Device Adapter feature (#3250) is required
devices are attached to the 3271. Up to four
can be attached with each Device Adapter.
if more than four
additional devices
--Transmission Speed feature (#7820 or 17821) is required.
--Control Storage Expansion feature (#1801) provides the ability to
access control unit storage addresses above 64K.
--Extended Function Storage feature (#3622) provides additional
storage required to !$1,1pport particular attachments or
configurations. Control Storage Expansion feature ("801) is a
prerequisite.
--Each 3274 Model lC requires a Common Communications Adapter feature ('6302) and an External Modem Interface ('3701). • IBM 3276 Control Unit Display Station Models 2, 3, and 41 (supported
as a 3271) for attachment of up to 7 additional 3278 Display Stations Models 2, 3, and 41 (supported as 3277s), 3287 Printers Models 1 and
2, (supported as 3284s or 3286s), and 3289 Printers Models 1 and 2
(supported on a 3276). To support this configuration, the following
are required:
--The basic 3276 Control Unit Display Station contains 1 integral
display station, (supported as a 3277), and permits a ttachmen t of
either 1 3278 Display Station Model 2, 3, and 41 (supported as a
3217) or 1 3287 Printer Models 1 and 2. (supported as a 3284 or
3286).
--Terminal Adapter No. 1 (13255) permits attachment of up to 2
additional devices (3278s,3287s and 3289s). Only 1 adapter is
permitted.
--Terminal Adapter No. 2 ('3256) permits attachment of up to 2
additional devices (3278s, 3287s and 3289s). Only 1 adapter is
permitted. Terminal Adapter No. 1 ('3255) is a prerequisite.
--Terminal Adapter No. 3 (#3257) permits attachment of up to 2
additional devices (3278s, 3287s and 3289s). Only 1 adapter is
permitted. Terminal Adapter No.2 (t3256) is a prerequisite.
--A 3274/3276 Attachment ('8331) is required for each 3287 Printer Model 1 or 2.
--Each 3276 requires one of the Communications features ('6301 or 16302) and either the External Modem Interface (#3701) or the 1200 BPS Integrated Modem feature (15500). The following control unit is remotely attached to either leased or
switched lines via a 2701 Data Adapter Unit, a 2703 Transmission Control
Unit, a 3704/3705 Communications Controller in emulation mode, or an
Integrated Communication Adapter (ICA) to support 3270 devices: • IBM 3275 Display Station MOdel 2 standalone control unit and display
station. A 3284 Printer Model 3 or 3286 Printer Model 3 can be
attached. Also, the following may be required:
--For the 3275 to be used on a switched line, Dial feature ('3440) is
required.
--Transmission Speed feature ('7820 or 17821) is required. lModels 3 and 4 are supported as Model 2 via hardware default. Part 1. Planning for System Generation 117

Configurations (Terminals)
--To attach a 3284 Printer "odel 3, a Printer Adapter feature (15550) is required.
--To attach a 3286 Printer 3, RPQ is required.
The 3275 Display station (remote attachment) and the 3277 Display Station 2 require one of the following features:
--66 Key EBCDIC Typewriter Keyboard (14630) --66 Key EBCDIC Data Entry Keyboard (14631) --78 Key Operator Console-Keyboard (14632) --78 Key EBCDIC Typewriter Keyboard (tq633) The 3276 Control Unit Display Station and the 3278 Display Station require one of the following features:
--75 Key EBCDIC Typewriter Keyboard (14621) --75 Key EBCDIC Data Entry Keyboard (14622) • prpr p-ql1i si tp is t he EBCDIC Cha racter Set feature (19082\ on
the 3276 or 3278.
The following features, while not required, enhance the convenience and
usability of the terminals:
--Keyboard Numeric Lock (14690) - All terminals
--Audible Alarm (11090) - All terminals
--Operator Identification Card Reader (14600) - 3275 and 3277 only
--Security Keylock (16340) - All terminals Slot Reader (15005) with Reader Control ('4999) - 3278 only
--Lowercase Character Display (RPQ 18K0366) - 3275 and 3277 only ]2
7
Q APL The following 3270 devices are supported by 3270 APL support: • 3271 eodel 2 or IBe 3272 2 Control Unit • IB" 3277 Display Station, eodel 2, with either of the following APL keyboards: jPL Feature
66-character keyboard --.4631 78-character keyboard 14638 The 78-character keyboard includes the 12 Program Function
keys, which are required if you wish to use the local copy function. • 3284 Printer, eodel 2, the IB" 3286 Printer, "odel 2, or the IBe 3287 printer, "odels 1 and 2.
The 3270 Data Analysis feature (11066) allows the use of APL with any or
all of the above devices. The 3270 Data Analysis feature is field-installable. Since lowercase display support is included in the APt hardware feature, the
Lowercase Display RPQ 18K0366 must be removed prior to installing the APL feature.
118 IB" V"/370 Planning and System Generation Guide