Binary Input Threshold Voltage; Threshold Hysteresis; Binary Input Filter Time - ABB RELION REX640 Technical Manual

1MRS759142 C
3.13.1
3.13.2
3.13.3
REX640
Technical Manual
The pulse counter input is enabled by setting the parameter Input 14 counter-mode in
Configuration/I/O modules/Slot #/Input filtering. When enabled, the pulse counter
input has dedicated Input counter threshold voltage and Input counter threshold
hysteresis settings.

Binary input threshold voltage

The parameter Input threshold voltage is used to set the threshold level of the binary
inputs. Input threshold voltage determines the voltage level for the activation of the
inputs. The threshold can be set for every module or slot specifically depending on the
Slot specific threshold setting.
Table 76: Input threshold voltage parameters
Parameter
Slot specific threshold
Input threshold voltage

Threshold hysteresis

Threshold hysteresis is used to determine the deactivation threshold for the binary
inputs in case of voltage drops in the auxiliary voltage supply. Threshold hysteresis
value determines how low the deactivation voltage is compared to the activation
voltage as a percentage. Hysteresis can be set for every module or slot specifically
depending on the Slot specific hysteresis setting.
Binary inputs always deactivate when the voltage level drops below
14 V.
Table 77: Threshold hysteresis parameters
Parameter
Slot specific hysteresis
Input threshold hysteresis

Binary input filter time

The filter time eliminates debounces and short disturbances on a binary input. The
filter time is set for each binary input of the protection relay.
Values
0=False
1=True
16...176 V
Values
0=False
1=True
10...50%
Section 3
Basic functions
Default
0=False
16 V
Default
0=False
10%
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