Parallel Channel Interface; Terminal Characteristics; Physical Characteristics; Electrical Characteristics - Control Data Corporation INFORMATION SYSTEMS TERMINAL II Hardware Maintenance Manual

PARALLEL CHANNEL INTERFACE
The parallel channel interface provides a means for the
terminal to communicate and exchange information with 16
addressable, external devices. Data is exchanged in
bit-parallel/byte-serial mode, with the terminal processor
controlllng the interface.
All voltage levels on the parallel channel are TTL compati-
ble, defined as follows:
Terminal output
Data Lines
+2.0 V ~ High S +5.25 V
+0 • 0 V SLow S +0 • 4 V
Terminal input
Data Lines
Others
+2.4 S High S +5.25 V
+0 • 0
S
Low
S
+0 • 4 V
Others
+2.0 V S High S +5.25 V
-0.25 V SLow S +0.8 V
+2.4 V S High S +5.25 V
+0.25 V SLow S +0.5 V
TERMINAL CHARACTERISTICS
The following are physical, electrical, environmental, per-
formance characteristics, as well as I/O signal cables and
grounding requirements of the terminal.
PHYSICAL CHARACTERISTICS
The terminal has the following dimensions and weights:
Width:
Height:
Depth:
Weight:
15.75 in (400 mm)
16.5 in (419
mm)
23.75 in (603 mm)
45 lb (20.5 kg), 60 Hz
53 lb (24.0 kg), 50 Hz
l20-V ac
=
45 lbs (20.5 kg)
220/240-V ac
=
53 lbs (24.1 kg)
ELECTRICAL CHARACTERISTICS
The electrical power requirements for the domestic termi-
nal, are listed below. The electrical power requirements
for the international unit, are listed within parentheses
in the cases where they differ from the domestic unit.
82100083
D
1-9
I