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3-8 HSPSERIES OPR 050614

and isolated from the ISHARE signal, so that it cannot affect the load share function if shorted.

The voltage level of this signal is generated with respect to the negative sense return (pin 19).

3.14 STATUS INDICATORS AND STATUS FLAGS

HSP power supplies provide both visual and electrical indication of the status of various critical

functions including source power status, output status, fan status and overtemperature condi-

tion; both visual and signal indicators are provided. Visual indication is provided via the four LED

indicators located on the front panel (see Figure 2-1). Signal indication is obtained via four sets

of Form C dry relay contacts accessed via the I/O connector; all three contacts are provided to

the user, permitting the selection of either normally-open (NO), normally-closed (NC) or both for

any application (refer to Table 2-1). The definition of “normal” in this instance refers to the status

of the contacts when the HSP is powered and operating normally (no fault); status flag outputs

remain valid even when source power is removed. These relay contacts are SELV and are iso-

lated from each other and from the output by 100V d-c to permit flexibility in application. A

description of the function of each status signal follows. Table 3-1 indicates the condition of sta-

tus flags and indicators for normal, fault, and no power conditions.

TABLE 3-1. STATUS INDICATORS AND FLAGS

CONDITION SIGNAL/INDICATOR

STATUS **

NORMAL * FAULT DETECTED

NO POWER

APPLIED

SOURCE

POWER

STATUS

POWER INDICATOR

ON (GREEN) OFF OFF

SOURCE POWER STATUS NC

CLOSED OPEN OPEN

SOURCE POWER STATUS NO

OPEN CLOSED CLOSED

OUTPUT

STATUS

DC FAIL INDICATOR

OFF ON (RED) OFF

OUTPUT STATUS NC

CLOSED OPEN OPEN

OUTPUT STATUS NO

OPEN CLOSED CLOSED

FAN

STATUS

FANFAIL INDICATOR

OFF ON (RED) OFF

FAN STATUS NC

CLOSED OPEN CLOSED

FAN STATUS NO

OPEN CLOSED OPEN

OVERTEMPERATURE

STATUS

OVERTEMP INDICATOR

OFF ON (AMBER) OFF

OVERTEMP STATUS NC

CLOSED OPEN CLOSED

OVERTEMP STATUS NO

OPEN CLOSED OPEN

* NORMAL IS DEFINED AS THE HSP POWERED AND OPERATING WITH NO FAULTS (SOURCE POWER WITHIN

SPECIFICATIONS, OUTPUT POWER WITHIN RATED LIMITS, FAN OPERATING, AND NO OVERTEMPERATURE CON-

DITION SENSED).

** CLOSED AND OPEN ARE REFERENCED TO THE ASSOCIATED STATUS COMMON TERMINATION.

NOTE:UPON INITIAL TURN-ON, FAN AND OVERTEMPERATURE STATUS LINES WILL BE IN “NORMAL” CONDITION

UNLESS A FAULT CONDITION IS SENSED.

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