UG:107
Page 19
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 1 through 6 have been configured as a single output parallel array (see Figure 6).
In order to disable this array, E/Ds 1 through 6 should be shorted together as shown in
Figure 6. With the 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 Shut Down (GSD) function.
Figure 6
Enable / Disable control
of Maxi arrays
L1 L2 L3
14
1
2
15
16
3
4
17
18
5
6
19
20
7
8
21
22
9
10
23
24
11
12
25
13
1
2
3
4
5
6
7
8
10
9
Figure 7
AC OK / Power Fail
10kΩ
1, 2, 12,15 Signal Ground
19 AC Power Fail
+5V
J10
2.49kΩ
2N2222
2.49kΩ
2N2222
2N2222
14 Phase Fail
18 AC Power OK
4.99kΩ
AC Power OK (J10-18)
This signal on J10-18 provides a status indication of the AC input power (see Figure 7). It is active high,
TTL compatible and capable of sourcing 10mA maximum. 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.
