Digital Equipment RW504-ZA, Service Manual

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1.4.2 Differential SCSI Interface
The differential SCSI interface specifies the use of a differential SCSI repeater
PCA. This PCA enables the library to be connected to an external differential
SCSI bus. The differential SCSI repeater PCA uses the equivalent of 10 meters
of SCSI cable internally, so the allowable external cable length is limited to 15
meters instead of the 25 meters usually allowed on a differential SCSI bus.
1.5 Product Matrix
The following products are discussed in this manual. To determine the product
and option numbers, find the product information labels located on the library’s
rear panel and check the corresponding information in Table 1–2.
Table 1–2 Optical Disk Library Products Matrix
Product No.
/Options
Description HP Designation
RW504-ZA 10.4-Gbyte multifunction optical disk library—
includes one 650-Mbyte 5.25-inch multifunction
optical drive mechanism and a single-ended SCSI
interface. Model 10LC
(C1718C)
RW524-ZA 20.8-Gbyte multifunction optical disk library—
includes one 1.3-Gbyte 5.25-inch multifunction
optical drive mechanism and a single-ended SCSI
interface. Model 20LT
(C1718T)
RW524-UB Converts 650-Mbyte multifunction drives to 1.3
Gbyte multifunction drives to be used with a
RW504 jukebox. Consists of one 1.3-Gbyte drive,
RFI shield, and installation guide.
1–6 Introduction