67
Operating Guide
PSI 8000 3U HS PV Series
EN
Date: 20-05-2016
Output off/on
Pin 13 „REM-SB“ is always operative and does not depend on
the remote mode . It can thus be used to switch off the output
without extra means, except the device was set to mode
local.
Then the pin has no function. Switching the output off is done by
connecting the pin to ground (DGND) via a low-resistive contact
like a switch, open collector transistor or relay, if setting „LOW“
was selected for the pin REM-SB (see section 10.3). If HIGH
is set, it is vice versa and the contact has to opened in order to
shut the output down (emergency off principle).
Note
A digital output of, for example, a PLC may not be able to
perform the action correctly, because it might not be low-
resistive enough. Always check the technical specifications
of your external control application.
Wiring example:
Activate remote control
Switching to remote control is required as soon as the device
is going to be controlled with external set values.
Remote control is active as long as pin REMOTE is given the
corresponding level and remote control is not interrupted by
local
mode.
Remote control active: REMOTE = LOW | HIGH
Remote control inactive: REMOTE = HIGH | LOW
With this series, the level to switch the device to remote control
depends on the setting LOW or HIGH, given for this pin in the
device setup.
Wiring example:
Attention!
The pin is tied to HIGH level by default. It means, if set-
ting
HIGH
is selected and the pin is left open, the DC
output would be permanently switched off, unless
local
is activated.
Attention!
When switching to analog remote control while the DC
output is on, the output voltage might instantly rise to
dangerous levels, depending on the given set values on
the analog interface!
Remote control of set values
The inputs VSEL (voltage U), CSEL (current I) and PSEL (power
P, where adjustable) have to be given with external, analog
voltages. For 0...100% value on the DC output it requires either
0...5 V or 0...10 V input voltage on these inputs.
Note
Remote control via analog interface always requires to put in
all
three
set values.
Wiring example:
Measuring actual values
Measuring the monitor outputs of the actual values is independ-
ent from remote control. Since there is no power monitor output,
only voltage and current monitor can be measured. The pins
VMON and CMON represent the actual DC output values with
either 0...10 V or 0...5 V for 0...100%.
By using an external analog multiplying circuit, the power moni-
tor could be calculated.
Wiring example:
Operating the device