Burkert 8400 Manuel D'utilisation page 32

9.7.1. Commutation modes on the 8400
Two commutation modes on the transistor or relay are available:
- hysteresis mode;
- window mode.
In hysteresis mode (see Fig. 24), the status of the transistor or
relay is changed:
- on detection of the high threshold (O HI) when the measured
temperature increases
- on detection of the low threshold (O LO) when the measured
temperature decreases.
Not inverted
Contact
ON
OFF
T°
OLO OHI
Fig. 24: Changing the output in hysteresis mode
32
Inverted
Contact
ON
OFF
OLO OHI
english
In window mode, the status of the transistor or relay output
is changed whenever one of the thresholds is detected (see
Fig. 25).
Contact
ON
OFF
OLO OHI
Fig. 25: Changing the output in window mode
The time delay before commutation (DEL) is valid for both output
thresholds. Commutation is done if one of the thresholds (O HI,
O LO) is exceeded for a period longer than the time delay prior to
commutation, DEL (see Fig. 26).
T°
Type 8400
Adjustment and functionalities
Not inverted
Contact
ON
OFF
T°
OLO OHI
Inverted
T°