V4

L3

V3

RI-L2

V2

L1

V1

V1-SCR

V1-LETT

NORM

PO

FI-UR

SO

FO

~ ON

DC ALERT

POWER OFF

POWER ON

MAINT.ON

LAMPS CHECK

SWITCH 1

SWITCH 2

STEP BY STEP

LOAD 1

LOAD 2

EMERG. OFF

STAND BY

MEM.CHECK

INV.ADD.

CLEAR

LOAD

HALT

START

OPER. CALL

CPU — front

Cabinet section 2A, drawing 14026 136. Nine tiers of forty card positions; a board usually spans two backplane rows at one column (A+B, C+D, …). Position 40 is at the left, 1 at the right. Scroll to zoom, drag to pan.

100%

board spanning both rows single-row board COCA connector filter board position empty

CPU — back

The wire-wrap side. Every card position presents seventeen pins: the nine odd ones down the left, the eight even ones down the right, pin 01 top-left and pin 17 bottom-left. Zoom in and click a contact to read what the backplane carries there.

100%

Zoom in to a card position, then click a contact.