Users Manual & Installation Guide
PV- 5127: Power supply module with UPS
Page 9 of 31
Heater and fan control and external LEDs connector (CN2)
Status for PV-5127 can be shown on external LEDs. These must be connected to CN2 by a 10
position ribbon cable with a mating connector. Furthermore, the +5V Standby and logical outputs
for the external heating element and the external fan are placed in this connector. The layout of this
connector is shown in the schematic to the left of the connector. The function of the individual
LEDs is shown in the table:
LED name Pin no Function
GND 1 System GND.
Mode_Green_LED 2 See note.
Heat_On 3 Logical output for external heat element, 3.3V when active.
Mode_Red_LED 4 See note.
Battery_LED 5 See section Battery monitor and charger.
Mains_OK_LED 6 On when m ains supply OK.
Hot_LED 7 See section UPS control.
Fan_On 8 Logical output for external fan, 3.3V when active.
Cold_LED 9 See section UPS control.
+5V_STB 10 +5V standby, is active when the main DC/DC converter is on.
Note: Mode_Green_LED and Mode_Red_LED are intended for use with a two-color red+green
LED. When both Mode LEDs are on, you get yellow. The possible colors are:
Mode LED color Function
Green On, both +5V and +12V are on
Yellow Standby, only +5V Standby is on
Off Off, main DC/DC converter is off
The LEDs should be connected like this:
RS232 connector (CN3)
This connector is documented in the UPS Control section.