Specifications

SECTION 3
INTERFACE
CONECTORS
3.1 1ntertace Connectors Location
The SUPER STAR system has seven I/O intertace connectors located
on the rear panel as shown in Figure 2-3. Five connectors are
25-pin type OB-25 connectors, which require a type DB-25 mating
connector tor intertace to serial peripheral devices. These tive
connectors are tor RS-232C compatible serial 1/0 intertace. Two
connectors are parallel intertace ports (Centronics compatible)
and are 25-pin type DB-25 connectors that require type DB-25
mating connectors.
NOTE
Not allot these seven 1/0 intertace are necessarily
internally wirea to circuit boards in the SUPER STAR,
depending upon the contiguration you have ordered.
See paragraph 3.4 entitled, 1/0 Connector
Contigurations.
3.2 Serial I/O Port Connectors
One ot the tive serial 1/0 port connectors is intended tor
intertacing a monitor/keyboard/terminal console. This connector
is intendea as Jl. The other tour serial 1/0 port connectots (J2
through J5) are intended tor intertacing a serial printer and/or
any other serial communications peripheral devices.
All tive serial 1/0 port connectors have the
assignmentssince they are all RS-232C compatibe.
identities the pin assignments tor these connectors.
same pin
Table 3-1
Table 3-1.
Pin No.
1
2
3
4
5
6
7
8
9-19
20
21-25
Serial 1/0 Port Pin Assignm~nts
3-1
Signal Assignments
System Ground
TxD - Transmit Data
RxD Receive Data
Not Used
CTS Clear To Send
DSR Data Set Ready
Signal Ground
Not Used
Not Used
DTR Data Terminal Ready
Not Used