Short description
A signal at input S sets output Q. A signal at input R resets output Q.
Connection | Description |
Input S | Set output Q with a signal at input S (Set). |
Input R | Reset output Q with a signal at input R (Reset). Output Q is reset if S and R are both set (reset has priority over set). |
Parameter | Retentivity set (on) = the status is retentive in memory. |
Output Q | Q is set with a signal at input S and remains set until it is reset with signal at input R. |
Timing diagram
Description of the function
The latching relay represents a simple binary memory logic. The output value depends on the input states and the previous status at the output.
Logic table of the latching relay:
S | R | Q | Remark |
0 | 0 | x | Status unchanged |
0 | 1 | 0 | Reset |
1 | 0 | 1 | Set |
1 | 1 | 0 | Reset |
When retentivity is enabled, the output signal corresponds with the signal status prior to the power failure.