Operator`s manual

Badger II Power Supply Operator’s Manual
Rev. 05/11/2012 Mission Power Solutions [phone] [e-mail] Pg. 8
General Shutdown (J2-7)
The General Shutdown (GSD) control pin on J2-7 allows simultaneous shutdown of all outputs. This pin must
be pulled down to less than 0.7 V and will source 4 mA maximum to shut down all outputs. The GSD pin
should be open-circuited or allowed to exceed 4.5 V when not in use, or when the outputs are to be enabled.
Do not apply more than 5V to this input at any time. Normal open-circuit voltage is 1.5-3 V with respect to
Signal Ground.
AC OK (J2-6)
AC OK is an active high TTL-compatible signal and provides a status indication of the AC input power. It is
on pin J2-6 and is capable of sinking 16 mA maximum. This signal switches to a TTL “1” when the high volt-
age bus exceeds low-line condition during turn-on. Upon loss of input power, the bus voltage will drop, caus-
ing the AC OK signal to go low. A minimum of 3 ms holdup time is provided for a 1,200 W load following
the loss of the AC OK signal.
+5V
AC OK’
2.5K
PN2222
J2-6 AC Power OK
J2-4 Signal Ground
Figure 12. AC OK Output Circuit
Auxiliary Vcc +5V/0.1A (J2-5)
The Vcc on J2-5 is an auxiliary 5 V regulated power source. It is +5 VDC ±5% with respect to Signal
Ground and can supply 100 mA maximum. It is short-circuit-proof, but if shorted, all outputs will shut down
through the Enable/Disable circuitry.
J2-5 Auxiliary Vcc
J2-4 Signal Ground
0.1 uF
+5V/100mA
78M05
Figure 13. Auxiliary +5V Vcc