5
Figure 3. Relay and Logic Circuits Connections
Additional and Changed Commands
The following power supply programming commands and queries have been added to the standard commands
(See Tables 5-1 and 5-2 of Operating Manual) to permit programming the supply with Option 750.
RELAY < ch >, < on/off > Opens (on/off = 0), or closes (on/off = 1) the RLY control for the specified
output channel (ch). All four RLY controls are available regardless of the
number of outputs in the power supply.
RELAY? < ch > Queries whether the RLY control for the specified output channel (ch) is open
or closed. The response is either 0 (open), or 1 (closed).
DC < ch >, < on/off > Turns the output off (on/off = 0), or turns the output on (on/off = 1) for the
specified output channel (ch) without affecting the state of the RLY controls.
DC? <ch> Queries whether the output for the specified channel (ch) is turned on or off.
The response is either 0 (off), or 1 (on).
DCPON < on/off > Sets the state of the output and RLY controls at power-on. For on/off = 0, the
outputs will be off and the RLY controls will be open. For on/off = 1, the
outputs will be on and the RLY controls will be closed. A CLR command will
put the outputs and RLY controls in the power-on state.
DCPON? Queries the power-on state of the outputs and RLY controls. The response is
either 0 (outputs off; RLY controls open), or 1 (outputs on; RLY controls
closed).
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