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FRONT PANEL FEATURES (continued)
LOW
LOW
LOW
EVS
EVS
EVS
1
1
1
2
2
2
105 110 115 120 125 130 135 140
105 110 115 120 125 130 135 140
100 105 110 115 120 125 130 135
LEDs 1 and 11: HIGH and LOW EVS
The M-8x AR uses LEDS 1 and 11 to indicate when an extreme voltage fault has occurred. If either of these LEDs are illuminated the M-8x AR has acted
to protect your connected equipment by cutting off power to all outputs. As an aid in troubleshooting, two LEDs (EVS HIGH and EVS LOW) are provided to
advise if the error was triggered by a high line (surge) or low line (sag) condition. In general the following applies:
• Whenever the incoming line voltage falls below safe conditions (sag), all outputs on the M-8x AR will be disabled and LED 1 (LOW EVS)
will be illuminated.
• Whenever the incoming line voltage rises above safe conditions (surge) all of the outlets on the M-8x AR will be disabled and LED 11
LOW
LOW
LOW
(HIGH EVS) will be illuminated.
EVS
EVS
EVS
LOW
LOW
EVS
EVS
105 110 115 120 125 130 135 140
105 110 115 120 125 130 135 140
100 105 110 115 120 125 130 135
1
1
2
2
100 105 110 115 120 125 130 135
100 105 110 115 120 125 130 135
LEDs 2 through 9: Input Voltage Monitoring:
The M-8x AR provides an approximate indication of incoming line voltage using LEDs 2 through 9. Each of these LEDs corresponds to the activation
of an individual tap on the internal autotransformer, thus only one of the eight LEDs (2 through 9) is illuminated at any time. The active LED will switch
amongst LEDs 2 through 9 as the incoming line voltage varies. Note that there are two yellow LEDs at the endpoints. When lit, they indicate that the in-
put voltage may be above or below the point at which the voltage can be regulated to the 120VAC nominal output voltage (though it may still be restored
to a usable level) but is not high or low enough to trigger an extreme voltage shutdown (EVS).
LOW
LOW
EVS
EVS
LOW
LOW
EVS
EVS
1
1
2
2
100 105 110 115 120 125 130 135
100 105 110 115 120 125 130 135
100 105 110 115 120 125 130 135
100 105 110 115 120 125 130 135
LED 10: WITHIN REGULATION LED (LED 10)
The within regulation LED (LED 10) provides a visual indication of the regulation status of the M-8x AR. This LED is capable of illuminating green, red,
or yellow. In general the following applies:
• When LED 10 is green, the incoming voltage falls within the regulation range of the M-8x AR and the output voltage is 120 +/- 5VAC
• LED 10 briefly is yellow when an adjustment has been made in the output voltage to maintain regulation.
• When LED 10 is red, the incoming voltage is outside the regulation range of the M-8x AR and the user should exercise caution.
LOW
LOW
EVS
EVS
5
100 105 110 115 120 125 130 135
100 105 110 115 120 125 130 135
INCOMING VOLTAGE
INCOMING VOLTAGE
INCOMING VOLTAGE
3
3
3
4
4
4
5
5
5
6
6
6
7
7
7
INCOMING VOLTAGE
INCOMING VOLTAGE
INCOMING VOLTAGE
INCOMING VOLTAGE
INCOMING VOLTAGE
3
3
4
4
5
5
6
6
7
7
INCOMING VOLTAGE
INCOMING VOLTAGE
INCOMING VOLTAGE
INCOMING VOLTAGE
3
3
4
4
5
5
6
6
7
7
INCOMING VOLTAGE
INCOMING VOLTAGE
HIGH
HIGH
HIGH
WITHIN
WITHIN
WITHIN
EVS
EVS
EVS
REG
REG
REG
8
8
8
9
9
9
10
10
10
GREEN - OK
GREEN - OK
GREEN - OK
YEL- LIMITED
YEL- LIMITED
YEL- LIMITED
RED - NOT OK
RED - NOT OK
RED - NOT OK
WITHIN
WITHIN
WITHIN
HIGH
HIGH
HIGH
EVS
EVS
EVS
REG
REG
REG
HIGH
HIGH
WITHIN
WITHIN
REG
REG
EVS
EVS
GREEN - OK
GREEN - OK
GREEN - OK
8
8
9
9
10
10
YEL- LIMITED
YEL- LIMITED
YEL- LIMITED
RED - NOT OK
RED - NOT OK
RED - NOT OK
GREEN - OK
GREEN - OK
YEL- LIMITED
YEL- LIMITED
RED - NOT OK
RED - NOT OK
HIGH
HIGH
WITHIN
WITHIN
EVS
EVS
REG
REG
WITHIN
WITHIN
HIGH
HIGH
EVS
EVS
REG
REG
8
8
9
9
10
10
GREEN - OK
GREEN - OK
YEL- LIMITED
YEL- LIMITED
RED - NOT OK
RED - NOT OK
GREEN - OK
GREEN - OK
YEL- LIMITED
YEL- LIMITED
RED - NOT OK
RED - NOT OK
WITHIN
WITHIN
HIGH
HIGH
EVS
EVS
REG
REG
GREEN - OK
GREEN - OK
YEL- LIMITED
YEL- LIMITED
EXTREME
EXTREME
EXTREME
CURRENT
CURRENT
CURRENT
11
11
11
12
12
12
EXTREME
EXTREME
EXTREME
CURRENT
CURRENT
CURRENT
EXTREME
EXTREME
CURRENT
CURRENT
11
11
12
12
EXTREME
EXTREME
CURRENT
CURRENT
EXTREME
EXTREME
CURRENT
CURRENT
11
11
12
12
EXTREME
EXTREME
CURRENT
CURRENT
PROTECTION
PROTECTION
PROTECTION
OK
OK
OK
13
13
13
PROTECTION
PROTECTION
PROTECTION
OK
OK
OK
PROTECTION
PROTECTION
OK
OK
13
13
PROTECTION
PROTECTION
OK
OK
PROTECTION
PROTECTION
OK
OK
13
13
PROTECTION
PROTECTION
OK
OK
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