16
Digital IN
Digital OUT
Digital OUT
Analog OUT
(I
out
= 4 ...20 mA DC)
Selbsttest / Self-test
VCSD aus / VCSD off
Status
Fehlerstatus
Rücksetzen Fehlerstatus
Reset failure mode
Start Selbsttest
Start self-test
Freigabe Schwellenspannung
Release threshold voltage
max. 2.5 mm²
Fig. 4.3.2a
Fig. 4.3.2b
4.3.2 Failure mode relay
- If a fault occurs, the
failure mode
is automatically activated. This means that the device has a
high impedance and the threshold value is no longer monitored.
- An external
failure mode relay
(e.g. switch contactor) can be connected on a higher level to
ensure personal protection (see Fig. 4.3.2c).
- After analysing (see Table 1, page 23) and eliminating the fault, if any, the failure mode can be
reset by pressing the
“Reset failure mode”
button (see Fig. 4.3.2b).
- The device returns to normal operation and the external
failure mode relay
is deactivated.
button
External failure mode relay, connection diagram
An external failure mode relay is activated as soon
as the failure mode is present.
Fig. 4.3.2c Failure mode relay
pipeline
external failure
mode relay
