Advanced Operation
Sorensen DCS Series 3kW Supplies
4.5.3 Shutdown
Application - Contact Closure
An external relay, whether normally open or normally closed, may be used to activate the
Shutdown circuit. Either positive or negative logic may be used.
To activate the Shutdown function using an external relay:
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.
Refer to
for instructions for resetting switches or making J3 connections.
2. Connect one side of the external relay to pin 15 (+15 Vdc Auxiliary Output) on connector
J3. Connect the other side of the relay to pin 14 (TTL Shutdown Input). Also connect
pin 2 (Shutdown Return) to pin 6 (Auxiliary Supply Ground). See
3. Set internal switch SW1-8 to select the desired circuit logic as shown in the table below.
Relay
Switch SW1-8 Setting
Relay Coil State
Output
Normally Open Relay
OPEN (Positive Logic)
Energized
OFF
De-energized
ON
CLOSED (Negative Logic)
Energized
ON
De-energized
OFF
Normally Closed Relay
OPEN (Positive Logic)
Energized
ON
De-energized
OFF
CLOSED (Negative Logic)
Energized
OFF
De-energized
ON
The red S/D (Shutdown) LED on the front panel lights up when the Shutdown circuit is
activated.
Figure 4-18 Using Shutdown with Contact Closure
of a Normally OPEN Relay (Positive Logic)
4-18
Operation Manual
