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Global Power Technologies 49
S-8500
Local and Remote Modes:
Any button press causes the Remote Start’s operating mode
to be switched to Local mode, indicated by the L13 indicator being lit. Any Auto/SCADA
starts are ignored until this mode times-out switches back to Remote operating mode. Local
mode will be held for 1 hour since the last button press, and Indicator L13 will begin blinking
5 minutes before this 1-hour ends. Stop requests are always accepted and acted upon in
either mode.
Auto Mode:
Turning on Auto functionality enables system-measurement controlled operation
while in Remote mode. This mode is only recommended for station battery charging systems
equipped with the temperature sensor and can be toggled on or off by pressing the Auto
switch S4 or by applying a SCADA Auto signal. As long as the Remote Start Board is both
in Auto and Remote mode, it will attempt to light the TEG when the external voltage has
fallen below the Auto Start threshold, and it will stop the TEG once the external voltage has
recovered to above the Auto Stop threshold. The Remote Start Board enforces a minimum
24-hour runtime while in Auto and Remote mode to preserve the operational lifetime of
the TEG power unit. See the adjustment section at the end of this document for details on
how to adjust Auto Start and Auto Stop voltage thresholds. In order to ensure correct Auto
functionality for S-8500 TEGs that have a 12V or 48V DC/DC Converter, the external sense
dipswitch must be turned ON and the external sense connector should be connected to both
V2 on the Remote Start board and your external 12V/48V system battery.
Optional Temperature Sensor:
The Remote Start Board performs temperature-
compensation logic on voltage measurements when a temperature sensor is connected
to the TEMP pins of connector A1. This ensures the accuracy of the Auto Start and Auto
Stop voltage thresholds regardless of the environment. The temperature sensor should be
attached to one of the posts of the station battery and is recommended for all Auto mode
systems. If not connected, the Remote Start Board defaults to 25°C (77°F).
Voltage Indicators:
The Remote Start Board has a heartbeat; one of three L1, L2, or L3
indicators blinks depending on the external voltage level. If the voltage level is below the
auto start threshold, L3 will blink red. If the voltage level is between the auto start and stop
thresholds, L2 will blink yellow. And if the voltage level is above the auto stop threshold, L1
will blink green.
Overvoltage:
The Remote Start also has built-in safety features for overvoltage protection.
If it detects the external voltage to be above 34Vdc (for 24V configuration) or 17V (for 12V
configuration), it will shut off the TEG. In this case indicator L1 will blink rapidly and the
7-segment display will show [HI] to inform users of the overvoltage condition.
Sleep Mode:
The Remote Start Board enters a low-power sleep mode when there is no
supply voltage, or it is connected to the battery and sitting in either standby or lockout. In
sleep mode the heartbeat is very short and less frequent to conserve battery power. Pressing
the start button or display button will wake up the Remote Start Board from sleep mode.
Cycle Count:
Pressing both the up and down pushbuttons simultaneously while the
Remote Start Board is in display mode will cause it to read the total number of cycles the
TEG has gone through. It will read [CYC] on the 7-segment display, followed by the cycle
count number. The cycle count increments every time the TEG is turned on and has ran
uninterrupted for at least 15 minutes.
Summary of Contents for S-8500
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Page 66: ...Global Power Technologies 60 S 8500 Figure 31 DC DC Converter with CP Panel wiring schematic ...
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