Specifications

CHAPTER 1
Overview of LaserWriter Pro Hardware
8
Communication
Apple Ethernet Adapter for EtherTalk (630 Only) 1
The LaserWriter Pro 630 controller supports AppleTalk over the Ethernet network. That
communications link is referred to as EtherTalk. A 14-pin connector provides the
interface to the Ethernet through Apple’s AUI interface, which allows you to connect to
ThinNet, 10-Base-T, and ThickNet cabling systems, using the appropriate Apple Ethernet
adapter. Figure 1-5 shows the 14-pin connector, and Table 1-5 lists the signal descriptions.
Figure 1-5 14-pin Ethernet connector
SCSI Connector (630 Only) 1
The LaserWriter Pro 630 provides connections for up to seven hard-disk drives through a
30-pin, square SCSI connector. These disk drives provide nonvolatile storage for
PostScript Level 2 resources, such as fonts. Figure 1-6 shows the pin designations for the
connector, and Table 1-6 lists the signal descriptions.
Table 1-5 Signal descriptions for Ethernet connector
Pin
number Signal name Description
1 AAUI5V +5 V power
2 RX+EXT Receive data positive
3 RX EXT Receive data negative
4 GND Ground
5 CD+EXT Carrier detect positive
6 CD EXT Carrier detect negative
7, 8 AAUI5V +5V power
9 TX+EXT Transmit data positive
10 TX EXT Transmit data negative
11 GND Ground
12, 13 Open Open line
14 AAU15V +5 V power
Pin 2 Pin 14
Pin 13
Pin 1
Connector viewed from
side of printer.
Odd pins in one row,
even pins in other row.