SH2SSTRI424 Carlo Gavazzi

SH2SSTRI424, Output of four solid state relays Model SH2SSTRI424, SH2SSTRI424, It is an output module of four solid state relays for DIN rail mounting. Outputs are usually disabled. When the Dupline® bus receives an activation command, the output is activated and remains activated until the deactivation order is received. Thanks to the internal bus, the modules of the SH2SSTRI424 can be connected to each other without the need to wire the Dupline bus®., SH2SSTRI424, Operating Mode If the SH2SSTRI424 is connected to the Dupline bus® and the bus works correctly, the output module will be in STANDARD mode and the green LED will be activated. The relay accesses local mode if the button is pressed or there is a bus failure or it is not connected. In LOCAL mode, the module does not support any bus order and the LED will flash. The relay can return to STANDARD mode only when the bus status is correct and one of the following events occurs: 1) Immediately after the return of the Dupline bus®. 2) After a time limit of 1 minute after pressing the button. 3) After restarting the power. Pushbutton The button is used to activate/deactivate the outputs, without the need to connect the bus for testing. Connected bus By a short press, the user accesses the LOCAL mode and the green LED starts flashing; at the same time, all outputs will be activated, if at least one of them is disabled. If all outputs are enabled, they will be disabled. Unconnected bus or bus failure. If the bus is not connected or there is a bus failure, the pushbutton will replace the safe state in case of failure of the outputs; if at least one of the outputs is disabled, all will be activated. If all outputs are enabled, they will be disabled. In case all outputs are set to the fail-safe restart state, a short press will restore the timer and restore the outputs to their original state. Safe status in case of failure The output status of the outputs, if the Dupline® bus is not connected or if there is a bus failure, is programmed through the Sx tool and the user can choose between the following options: 1. Outputs always disabled 2. Always on outputs 3. The outputs maintain the state they had before the disconnection