ABB RELION REX640, Техническое руководство, Страница: 161 / 1960

counter threshold voltage and Input counter threshold hysteresis settings. Oxide-
burn feature cannot be disabled in BIO1002 & BIO1004.
In RTD1002 module wetting current can be adjusted by setting the parameter
Input oxide burn A in Configuration > I/O modules > Slot # > Input filtering. This
parameter is common for all binary inputs in the module.
3.13.1 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 95: Input threshold voltage parameters
Parameter Values Default
Slot specific threshold
0=False
1=True 0=False
Input threshold voltage 16…176 V 16 V
3.13.2 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 96: Threshold hysteresis parameters
Parameter Values Default
Slot specific hysteresis
0=False
1=True 0=False
Input threshold hysteresis 10…50 % 10 %
3.13.3 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.
1MRS759142 F Basic functions
REX640
Technical Manual
161