Datasheet

SSP-KONSTANTER, Series SSP 120 / 240 / 320
Laboratory Power Supplies
2 GMC-I Messtechnik GmbH
Adjustable Functions
– Voltage and current setpoint values
– Voltage and current limit values (softlimits)
– Output ON and OFF
– Overvoltage protection – threshold
– Overcurrent protection (limiting with/without shut-down)
– Delay time for overcurrent shut-down
– Power-on condition
– Reset instrument parameters
– Save instrument parameter settings
– Individual or sequential recall of instrument parameter settings
– Sequence function (arbitrary function)
– Function selection for trigger input
– Function selection for digital control outputs
– Operating parameters for measuring functions (storage of
extreme values, limit value monitoring, display resolution)
– Calibration procedure
– Self-test trigger
– Operating parameters for PC interfaces
(device address, SRQ masks, data rate etc.)
Query Functions
– Momentary voltage, current and power measurement values
– Minimum and maximum voltage and current measurement
values
– Current instrument parameter settings
– Current operating condition (control type, excessive 
temperature, busy)
– Events (power failure, excessive temperature, 
overvoltage, overload, programming error)
– Memory contents
– Device identification
– Calibration date
Protection and Additional Functions
– Sensor terminals equipped with pole reversal protection and
automatic activation (auto-sensing)
– Control panel operating elements can be disabled
– Overvoltage-protected outputs
– Pole reversal protection at outputs (Sense line)
– Protection against excessive temperature
– Parameter settings memory protected with backup battery
– Master-slave link
– Inrush current limiting
– Temperature controlled fan
Auto-Sensing
Switch-over to sense mode (remote sensing) is possible to com-
pensate the voltage drop in the load conductors.
If the Sense terminals are connected to the appropriate output
terminals, remote sensing is automatically activated.
Max. compensatable voltage drop: 1 V / load conductor
Control Panel Disabling
The operating elements can be protected against unauthorized
operation by pressing a key, with a command from the PC or with
a signal to the trigger input.
Output Activation and Shut-Down
The power output can be switched on and off by pressing a key,
with a command from the PC or with a signal to the trigger input
(no electrical isolation).
Power-On Condition
Any of the following conditions can be selected for the instrument
after mains power has been switched on:
– reset = default settings (0 V, 0 A, output inactive etc.)
– recall = latest settings
(as before last disconnection from mains)
– standby = latest settings, except with inactive output
Overcurrent Protection
A selection can be made between one of the following output
functions for the use of current control:
–OCP off= continuous current limiting (UI characteristic curve)
– OCP on = output is deactivated if current limiting duration
exceeds DELAY time

DELAY time: adjustable from 0.00 to 99.99 sec.
Trigger Selection
The floating trigger input can be set up to control any one of the
following functions at the analog interface:
– output = switch the power output on and off
– local lock = disable the control panel
– recall = step by step recall of individual settings from
memory
– sequence = start / stop the SEQUENCE function (arbitrary
function)
– minmax = activate and deactivate storage
of extreme values to memory
– off = has no effect on instrument settings, although
status query is possible via PC interface