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Enable / Disable control of Maxi Module Arrays
When using the Enable / Disable function on an output that consists of two or more Maxi modules, it
is necessary to connect the E/D pins of the corresponding module locations together such that both
modules are commanded to turn ON or OFF simultaneously.
Example:
Slots 2, 4 and 6 have been configured as a single-output parallel array (see Figure 6).
In order to disable the 48V output, E/D 2, E/D 4 and E/D 6 should be shorted together as shown in
Figure 6. With E/Ds connected together, a single switch can then be used to remotely enable and
disable the output.
Note:
For single output power supply configurations, the simplest method of remotely enabling and disabling the
output is to use the General Shutdown (GSD) function.
General Shutdown / GSD (J10-12)
The GSD control pin on J10-12 allows simultaneous shutdown of all ConverterPAC™ outputs (see
Connector Pin Identification on Page 16, Figure 4). This pin must be pulled down to less than 0.7V and
will sink 13mA maximum to shut down all outputs. The GSD pin should be open circuited or allowed
to exceed 4.5V when not in use or when the outputs are to be enabled. Do not apply more than 6V to
this input at any time. Normal open circuit voltage is 1.5 – 3V with respect to Signal Ground. If driven
from an electromechanical switch or relay, a capacitor should be connected to eliminate the effects
of switch bounce.
AC OK / Power Fail (J10-11)
This is an active high TTL compatible signal and provides a status indication of the AC input power
(see Figure 7 and Connector Pin Identification on Page 16, Figure 4). It is capable of sourcing 0.5mA at
>3.2V and sink 16mA at <0.5V. This signal switches to a TTL “1” when the high-voltage bus exceeds
low-line condition during turn-on and switches to a TTL “0” 3ms (minimum) before loss of output
regulation due to the loss of input AC power. This signal can be used to warn external control circuits
of an impending
loss of power.
Figure 6
Enable / disable control
of Maxi Arrays
PZL48V/12.5AN
PZL48V/12.5AJS1
PZL48V/12.5AJS1
Slot# 1
Slot# 2
Slot# 3
Slot# 4
Slot# 5
Slot# 6
Slot# 7
Slot# 8
J1
J10
2
4
6
10
12
3
Power Facto
r Corrected
MegaPAC
L5V/40A
L3.3V/40A