The binary inputs are mainly assembled in groups of two inputs that have one common connection. The binary inputs are bipolar so the common connection can be tied to ground or to supply voltage. Input groups are isolated from each other and from the secondary side.- For more information, see Module diagrams in this manual.
Every binary input has an oxide-burn feature, that is, wetting current. The oxide-burn feature can be disabled only on binary input 14 that can be used as a pulse counter input.
The pulse counter input is enabled by setting the parameter Input 14 counter-mode in . When enabled, the pulse counter input has dedicated Input counter threshold voltage and Input counter threshold hysteresis settings.