P. 7 / 12
Profibus DP – CBF-B1/CBFF-B1 Burner Control Box
vor00161
Before starting the power supply 230V AC (optional 115V AC) and release signal input via process safety chain has to be
connected directly to the CBF(F)-B1 control box according to supplied electrical drawings. Input of safety chain is charged
by load of ignition transformer an the connected gas valves. The load for air valves and for the CBF(F)-B1 control box is
charged from terminal X2.1.
For burners in FLOX mode a CBFF-B1 control box has to be used. Additionally the fail save inputs for the switching signals
for Flame and FLOX mode from the fail save FLOX temperature monitoring system has to be connected to the CBFF-B1
control box. To disengage FLOX mode an active signal level (230V AC L1-level optional 115V AC) at the FLOX input is
necessary and the furnace temperature must be surely above 850°C.
In this case the input fur Flame mode must be disabled. On the other hand when the temperature falls below 850°C the
FLOX input has to be disabled and the Flame input has to be enabled. The switching must be done within 1 sec. otherwise a
fault signal (FF “blinking”) will be caused.
The supplied connector for Profibus (bus cables included) has to be installed according to electrical drawing (p. 3). Profibus
version reduces wiring, as only power supply and safety interlocks (230V) must be run to the box in addition to the bus ca-
ble.
Control cables for the burner components are pre-installed and only require hook up on site. The unit is pre-wired and tested
for functionality prior to delivery. An electrical schematic is located on the inside of the box lid. Each box is marked with an
individual serial number, located on the side of the box.
On the lid two push-buttons, ON/OFF and Reset/Info, are mounted below the 2 digit display. These buttons are also used
for manual burner control. A fault schedule for failure code interpretation is inserted into a pouch on the lid as well.
Activation and feed-back is according to data transmission handling (p. 4/5) from master to control boxes
Before start-up of FLOX burner, the connectors and signals of FLOX mode and Flame mode have to be checked ex-
actly and the settings have to be tested for correct functionality with c l o s e d gas supply – in case of wrong connec-
tion:
explosion hazard
Fig. 5: Connection diagram CBF-B1 with Profibus
Hardware connection CBF(F)-B1 :