Sorensen DCS Series 3kW Supplies
Advanced Operation
Figure 4-13 Remote Programming of OVP with a 0 –10 Vdc External Voltage Source
4.5
4.5.1
4.5.2
Using the Shutdown Function
The Shutdown function is used to disable or enable the supply's output voltage and current. It
can be used to allow adjustments to be made to either the load or the power supply without
shutting off the entire supply. This function may be activated from the front panel at any time by
using the STANDBY switch. It can also be activated via remote programming, using positive or
negative logic, with a TTL compatible input or with an AC or DC signal.
STANDBY
Switch
The STANDBY switch is a press ON/press OFF switch located on the power supply's front
panel. See front panel diagram in
. When pushed IN, or depressed, the Shutdown
circuit is activated, the output voltage and current fall to zero and the S/D (Shutdown) LED on
the front panel is illuminated. Pushing the switch once more resets it to its OUT position and
normal power supply operation is resumed.
Programming
the Shutdown Function
The Shutdown circuit uses either a TTL compatible signal, or a 12-250 Vac or 12-130 Vdc input,
to disable or enable the power supply output. Connections for TTL, AC, or DC input signals are
made at connector J3. Internal switch SW1-8 settings determine whether positive or negative
logic for the signal is used. The input lines for the Shutdown circuit are optically isolated and can
therefore be used by input sources with a voltage differential of up to 400 Vdc.
External Wiring
Use 20 to 24 AWG wiring when making connections to the J3 connector. Keep wiring as short
as possible.
TTL Shutdown
To activate the Shutdown function using a TTL compatible input:
1. Turn off the power supply and disconnect the AC power source. Allow five (5) minutes to
elapse to dissipate stored energy before making connections or resetting switches.
Operation Manual
4-15
