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.
Parameter Mode
The “A” scale on the right 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 set values for the tripping currents for each individual channel are displayed and
the LED matrix display also shows if a channel has switched off due to a too high current or on purpose.
– Displaying of the set current: The green LED shows the set current of the individual channel.
– Displaying of the tripping characteristic: Push the SET button. The selected characteristic is shown on the LED matrix for
2 seconds. Letter F indicates the fast and the letter S the slow tripping characteristic.
– Red LEDs: These indicate a switched off or overloaded channel and include the same LED blinking pattern and push-
button behavior as in the measurement mode. If a channel is set to 12A, the LED below the uppermost LED will display
this switched-off information.
Changing of Trip Currents and Trip Characteristic
Factory settings are that all channels are turned on with a 1A setting in a fast tripping characteristic and in measurement
mode. Parameters can be changed in the measurement mode as well as in the parameter mode. Parameters can be changed
regardless of whether a channel is switched off or not.
– Changing the current settings: Press and hold the SET button for at least 1s. The triangular green "A" LED starts flashing.
After that, shortly tap the channel control button multiple times to adjust the current step by step. When the desired
setting is found, press the SET buttons for more than 50ms to save the setting. This mode ends automatically 10 seconds
after no more buttons are pushed. In case the settings are not saved by pressing the SET button, changes of tripping
currents are not stored.
– Changing of the tripping characteristic (slow or fast): To change the characteristic for all channels push the SET and the
channel control button 3 at the same time. The selected characteristic is shown on the LED matrix for 2 seconds and
stored automatically. Letter “F” indicates the fast and “S” the slow tripping characteristic.
Tripping currents and characteristic setting can be protected against changes with a PIN code. To lock the settings push the
SET and channel control button 1 until the unit shows a moving text “PIN TO LOCK”. Enter a 4-digit PIN by pushing any
combination of channel control buttons 1-8. Push the SET button to save the PIN, the unit shows a moving text “LOCKED”.
To unlock settings push the SET and channel control button 1, the unit shows a moving text “PIN TO UNLOCK” and enter
the 4-digit PIN you selected and confirm it by pushing the SET button.
For LED pattern examples, please refer to Fig. 7.2 and Fig. 7.3.
