page 16 of 25 GBB-EXKOM-08157/3
6. Transformer isolated barrier KFD2-ST2-Ex1.LB
Monitoring of Q-Rohr
®
and triple section bursting discs or other indicators is carried
out by the transformer isolated barrier KFD2-ST2-Ex1.LB electronic.
Three integrated LED's serve for status indication:
Green LED lights: Power supply is connected to the relay = no fault
Yellow LED lights: Output signal = sensor ok = save status
Yellow LED dark: Sensor or bursting disc not ok = alarm status
Red LED flashing: Broken cable to sensor = failure = alarm status
The KFD2-ST2-Ex1.LB electronic is supplied via the
EXKOP
®MINI
Safety Controller. The signal cables are
monitored for lead breakage and short-circuit.
The no-fault-status of the signaling unit is indicated
by the Yellow LED. This also ensures that also
bursting discs, Q-Rohr
®
and other protective
units are reliably monitored for their operating
condition in a central location. Upon activation
of the bursting disc signaling unit, an alarm is
generated (Yellow LED dark).
The EXKOP
®MINI
Safety Controller detects this condition and immediately activates
the QV II Quench Valve as well as alarm. The EXKOP
®MINI
Safety Controller can
only be armed when the signaling unit has no fault status: Yellow LED light is on.
The connection of power supply voltage of the input modules is already wired.
The signaling unit of the bursting disc, Q-Rohr
®
or other signaling units (blue cable)
has to be connected to the junction box as follows:
Junction box near the bursting disc and/or the Q-Rohr
®
500Ω 10kΩ
PE 1 2 3 4
EXKOP
®MINI
bursting disc /
Q-Rohr
®
, Q-Box II
KFD2-Relay
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