AT&T 3B2/300 Technical Reference Manual page 93

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AT&T Disk Controller Module/4E (ED-3T011-30,G1)
Major Assemblies
Figure 2-15 shows an AT&T Disk Controller Module (DCM/4E). The DCM/4E cabinet contains an
ESDI bridge controller and power supply. The DCM/4E acts as one tap on the SCSI single-ended bus
and can control up to four Disk Modules (DMs). The DCM/4E bridges the single-ended SCSI bus of
the Host Adapter to the ESDI of the disk drives. The major assemblies are listed below:
• Power Supply (TRW #095-10065)
• Target Bridge Controller (WP91205,L3).
EQUIPMENT DESCRIPTION 2-69