Enable/Disable Control Via Rear Panel J1 Connector - Delta D750 User Manual

User Manual
D750
DC Power Supply
will enable or disable the power supply output according to the signal level or the short/open
applied to J1. This function is useful for connecting power supplies in a "Daisy-chain" (refer
to section 3.4.3). The SO control can be used also to reset the OVP and Fold Protection.
Refer to sect. 3.2.3 and 3.2.5 for details.
When the unit is shut-off by J1 signal, the VOLTAGE display will show "SO" to indicate
the unit state. J1 contact 15 is the SO signal input and contacts 2 and 3, IF_COM, are the
signal return (connected internally). The SO control logic can be selected by the rear panel
SW1 Setup switch. Refer to Table 3-5 for SW1 setting and SO control logic.
Table 3-5: SO logic selection
SW1-5 setting
Down (default)
Up

3.2.8 Enable/Disable Control Via Rear Panel J1 Connector

Contacts 1 and 14 of J1 (Fig.3-2, Item 5) serve as Output Enable/Disable terminals by
switch or relay. This function is enabled or disabled by the SW1 Setup switch position 9.
Refer to Table 3-6 for Enable/Disable function and SW1 setting.
Table 3-6: Enable/Disable function and SW1 setting
SW1-9 setting
Down (Default)
Up
To prevent possible damage to the unit, do not connect any of the Enable/Disable inputs
Safe Start mode- If the Enable/Disable fault condition clears when units in safe start
mode recovery is by pressing OUT button or by sending a 'OUT 1' serial command.
Auto Restart mode- The output will return back ON automatically when the Enable/Disable
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SO signal level
J1-2(3), 15
Open
Short
Open
Short
Enable/Disable inputs
Open or Short
Open
Short
to the positive or negative output potential.
fault conditions clears.
Power supply
output
On
Off
Off
On
Power supply Display
output
On Voltage/Current
Off "ENA"
On Voltage/Current
CAUTION
NOTE
Display
Voltage/Current
"SO"
"SO"
Voltage/Current
ALARM
LED
Off
Blinking
Off