PISA-B-812-B1
PISA-B-812-B4
Apr. 2021 / Rev. 0.1 DS-PISA-B-812-Bx-xx-EN
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All parameters are specified at 24Vdc input voltage, 8x5A output currents, 25°C ambient and after a 5 minutes run-in time unless otherwise noted.
7.
Control And Monitoring Features
The LED matrix display provides information about measurement, set parameters and errors and contains two modes. To
switch between the two modes, the measurement mode and the parameter mode, push the SET button and the channel
control button 4.
Fig. 7-1: Control and monitoring elements
Special Key Combinations
Special shortcuts allow quick access to certain information:
Press SET + CCB1 button: Lock/Unlock setting with PIN
Press SET + CCB2 button: Show FW version
Press SET + CCB3 button: Slow/Fast mode
Press SET + CCB4 button: Measurement/Parameter mode
Measurement Mode
The “%” scale on the left side of the LED Matrix is used in this mode, which is also indicated by the triangular LED below
the LED matrix display. In this mode the actual current values are shown and the LED matrix display also shows, if a channel
has switched off due to a too high current or on purpose.
– One or more green/yellow LEDs are on: These LEDs indicate the actual channel current in percent of the set value. Peak
values are stored in a peak detector and are additionally shown with one LED for a short period of time.
– Uppermost LED is red: This indicates a switched off channel. To switch the channel back on, the corresponding channel
control button must be pressed for at least 50ms. A further push switches the channel off again.
– Uppermost LED is single flashing in red (2Hz): This indicates that a channel has switched off due to too high current. A
restart can be done either by a button on the unit or by a control signal. Therefore, push the corresponding channel
control button for longer than 1s or apply a voltage between 10 and 30Vdc (max. 6mA current consumption) for longer
than 1s to the reset input. The reset input is galvanically isolated from the rest of the device.
– Uppermost LED is double flashing in red: This indicates that a channel has switched off because the total current of the
module exceeds 40A. In such cases, first the overloaded channels are switched off, then channels 8 to 1 in descending
order.
– Display of the settings for tripping currents and tripping characteristic: Push the SET button for more than 50ms. First the
tripping currents are displayed, followed by the tripping characteristic with the letter “F” (for fast tripping) or “S” (for
slow tripping). This function ends automatically after 5s.
