IBM 5074, 5078, 5079, 578 Appendix D. Cabling rules for systems with a migration unit or the 9079 and 9094 expansion unit

Appendix D. Cabling rules for systems with a migration unitor the 9079 and 9094 expansion unit

System unit Rule

iSeries 820 vA503x migration unit must be in the first position of the HSL

loop if there are a total of three external units or fewer.The

first position is the position that is closest to connector A0 on

the system unit. See Figure31 on page46 and Figure 32 on

page46.

vIf there are four or five external units, the 503x must be in the

second position of the HSL loop. Theremust be one

expansion unit between A0 and the 503x. See Figure33 on

page47 and Figure 34 on page 47.

vThe 5079 counts as two independent 5074s. If you have two

5079s and one 503x, follow the cabling diagram that is shown

in Figure 35 on page 47.

vThe 503x must be in the last position of the SPCN loop. See

Figure36 on page48.

iSeries 830 vYoucannot install a 5074 or 5079 on the same HSL loop as the

503x or 5077 migration unit. Use the next available HSL

connector.

vThe 503x must be in the last position of the SPCN loop. See

Figure36 on page48.

vSet up the SPCN cable for your 5074 in the same SPCN loop

as the 5077.

This is true even though you are connecting the 5074 to a

different HSLloop than the 5077.

Youcan do this by connecting the SPCN cable from J15 of

your new expansion unit to J16 of the 5077.

See Figure 37 on page 48.

iSeries 840 vYoucannot install a 5074 or 5079 to the same HSL loop as the

5077.

vYoucan install up to two 5074s or one 5079 with a 9079 on

the first loop (A0 and A1).

vSet up the SPCN cable for your 5074 or 5079 in the same

SPCN loop as the 5077 or 9079.

This is true even though you are connecting the 5074 or 5079

to a different HSLloop than the 5077 or 9079.

Youcan do this by connecting the SPCN cable from J15 of

your new expansion unit to J16 of the 5077 or 9079.

See Figure 37 on page 48.