Technical data

9030/40 Diagrams 9-23

I/O

Backplane Signal Definitions (Continued)

Signal Definition

NSTS

110

bus status (negative true).

NSWO

Select code switch 0 (negative true).

NSWI

Select

code switch 1 (negative true).

NSW2

Select

code switch 2 (negative true).

NSYNC Synchronize (negative true).

NUAD

Your address; slot/select code select (negative true).

NWAIT

(Not used)

PPON

Primary

power on;

all

outputs

spec.

READ

I/O bus data direction (positive true; high indicates data to lOP).

SGND Safety

ground.

SPON

Same

as PPON.