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S&C Instruction Sheet 1041-540 7
Installation
The faceplate includes the following LEDs:
Overcurrent Fault LED
This LED becomes lit when the switch control detects an
Overcurrent
condition. For a
normally closed switch, the LED turns off when all of the following are true:
• Three-phase line voltage has been sensed.
• The switch is closed.
• Forty-five minutes have elapsed.
The LED also turns OFF when the switch is closed and someone toggles the switch
on the faceplate The REMOTE/LOCAL switch or clears the LED via SCADA.
For the normally open switch, the LED turns off when doing one of the following:
• Toggle the REMOTE/LOCAL switch or clear the LED via SCADA. (The line switch can
be open or closed.)
• Close the switch from the faceplate or via SCADA.
Note:
The LED cannot be cleared via SCADA if the REMOTE/LOCAL switch is in the
Local
position.
Note:
When reinitializing the switch control using the IntelliLink software, the LED
turns off regardless of whether the conditions above are met.
Remote Communication RCV/XMT LEDs
These LEDs blink when the switch control sends or receives signals through remote-
communication equipment installed in the control enclosure. There are separate sets of
LEDs for Port A and Port B.
RCV LED
– Blinks when the switch control detects an incoming character
XMT LED
– Blinks when the switch control sends one or more characters
Note:
Activity on both of these LEDs will be seen only if remote-communications
equipment is installed, properly connected, and receiving power. The XMT LED blinks
any time a transmit is attempted, regardless of whether communications equipment is
properly installed.
Error Detected LED
This LED lights up if the switch control detects any of the following conditions:
•
Battery charger overvoltage
. If the charger attempts to overcharge the battery, the
switch control turns the charger off and turns on the LED.
•
Open/close contacts are not mutually exclusive
. The switch position contacts are
either both open or both closed.
•
Temperature sensor failure
. The temperature sensor (on the PS/IO) reads abnormally
high or low (generally caused by an open/shorted circuit).
•
Switch error (5801 control)
. There is an error with the switch, such as open visual
disconnect contacts (Scada-Mate) or low pressure (Joslyn).
•
Switch in Local mode (5802/5803 controls)
. The switch control senses that one
of the switches is in
Local
mode (a manual mode for the switch, selected at the low
voltage cabinet).
Processor Status LED
This LED blinks once per second when the switch control has power and the control’s
software is running normally.
Faceplate LEDs