IBM TotalStorage 3494 Tape Library, Operator'S Manual

Page: 44 / 605

Figure 18 on page 19 shows the rear (without the rear door) of the 3494 CX1
Frame, with the following functional components:
1
VTCs
Two or four VTCs may be installed in the 3494 CX1 Frame. The VTCs
provide interconnection between the 3494 B18, B10, and B20 VTSs and host
system FICON (3494 B10 and B20 VTS only) and/or ESCON attachments.
The position numbers for the VTCs are 0, 1, 2, and 3. Position 0 is the
lowermost position. Position 3 is the uppermost position. When the 3494
CX1 Frame contains only two VTCs, they are in positions 0 and 1.
2
Primary Control Compartments
The primary control compartments distribute power to the VTCs in the
3494 CX1 Frame. The lower primary control compartment powers the
VTCs in positions 0 and 2. The upper primary control compartment
powers the VTCs in positions 1 and 3.
A06C0329
1
2
Figure 17. 3494 CX0 Frame Functional Components (Rear View)
18
3494 Tape Library Operator Guide