13-6 Testing and Troubleshooting Date Code 990215
SEL-351P Manual Técnico
Self-Test
Condition
Limits
Protection
Disabled
ALARM
Output
Description
Failure +4.65 V
+5.40 V
Yes Latched
+5 V REG Warning +4.75 V
+5.20,
-5.25 V
No Pulsed Measures the regulated
5 V power supply every
10 seconds.
Failure +4.50 V
+5.40,
-5.50 V
Yes Latched
+12 V PS Warning +11.50 V
+
12.50 V
No Pulsed Measures the 12 V power
supply every 10 seconds.
Failure +11.20 V
+
14.00 V
Yes Latched
+15 V PS Warning +14.40 V
+
15.60 V
No Pulsed Measures the 15 V power
supply every 10 seconds.
Failure +14.00 V
+
16.00 V
Yes Latched
TEMP Warning
-40° C
+85° C
No Measures the temperature
at the A/D voltage
reference every 10
seconds.
Failure
-50° C
+100° C
Yes Latched
RAM Failure Yes Latched Performs a read/write test
on system RAM every 60
seconds.
ROM Failure checksum Yes Latched Performs a checksum test
on the SEL-351P
program memory every
10 seconds.
A/D Failure Yes Latched Validates proper number
of conversions each 1/4
cycle.
CR_RAM Failure checksum Yes Latched Performs a checksum test
on the active copy of the
SEL-351P settings every
10 seconds.
EEPROM Failure checksum Yes Latched Performs a checksum test
on the nonvolatile copy
of the SEL-351P settings
every 10 seconds.
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