Figure 2-1. vxi address select, Vxi address select -2, 1. t – KEPCO TMA VXI-27 User Manual

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2-2

TMA VXI -27 101602

b. Auxiliary Signals connector. This is a 15 pin D-type female receptacle. Refer to Table 2-1 for

pin assignments.

The DISCRETE FAULT LINE relay has the contacts open if the internal microsystem is
functioning normal by monitoring a pulse generated in the timer interrupt routine. If the micro-
system is not functioning normally or a catastrophic condition appears on one of the power mod-
ules the contacts will close and then reopen when the catastrophic condition disappears and the
error buffer has been read (if the Command Language is CIIL) or when the Device Dependent
Error from the Event Status Register has been read (if the Command Language is SCPI).

The ISOLATED and NON ISOLATED EMERGENCY SHUT-DOWN INPUTS activates the
non-maskable interrupt of the microsystem forcing the microsystem to send a reset to all
KEPCO power supplies.

FIGURE 2-1. VXI ADDRESS SELECT