KEPCO HSP Series Operator Manual - Manual (Page 34)

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.