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Wiring
▷ PROFIBUS installation guidelines, see
www.profibus.com.
Do not confuse data cables A and B in the
PROFIBUS plug.
BCU..B1/1
2A
PROFIBUS DP
ON
OFF
Connect the shield on both sides and over a
wide area with shield clips in the plug.
▷ Ensure an equipotential bond between the units.
Switch on the terminal resistors on the first and
last subscriber in the segment.
4 Wire control signals that are relevant for safety,
such as the safety interlocks and digital input,
separately.
▷ The purge signals can be transferred via the
bus communication or by a separate cable via
terminal.
▷ Protect the communications network against
unauthorized access.
2B
1A
1B
ON
OFF
Commissioning
WARNING
Risk of explosion! Do not enable the BCM and
control unit (BCU) for operation until the parameter
settings and wiring are correct and the faultless
processing of all input and output signals has been
ensured.
If the control unit is activated via the inputs at the
terminals in the event of faulty or interrupted bus
communication, invalid communications data, or
during initialization, the normal program runs. Be
sure to take the settings of parameters A085 to
A089 into account.
▷ Fieldbus communication can be configured using
the engineering tool of the automation system.
▷ The BCSoft operating instructions and software
can be downloaded from www.docuthek.com.
Set parameter A080 = 2 (Fieldbus communica-
tion without address check).
Check the code switch settings (001 to 125) on
the BCM for PROFIBUS communication between
BCSoft and the control unit.
▷ Each code switch setting combination may only
exist once within the fieldbus system.
▷ Each device name/network name may only be
allocated once within the fieldbus system.
▷ All the device-specific parameters for the
BCM..B1 are saved in a device master data
file (GSD): download from www.docuthek.com.
Copy the GSD file.
▷ The steps required to copy the file are described
in the instructions for the automation system.
4 Configure the PROFIBUS DP using the appropri-
ate tools of the automation system you are using.
▷ The BCM..B1 will automatically identify the baud
rate (max. 1.5 Mbit/s).
▷ The max. range per segment depends on the
baud rate:
Baud rate [kbit/s]
93.75
Range [m (ft)]
1200
(3937)
▷ For instructions on commissioning the control
unit, see operating instructions "Burner control
unit BCU 46x, 480".
▷ The ranges can be increased by using repeaters.
No more than three repeaters should be con-
nected in series.
▷ The BCU with BCM..B1 indicates
mains switch has been switched off. This signals
Standby mode. Bit 6 = 0. The bus interface is
still supplied with voltage to maintain the func-
tion of the communications system. The control
outputs of the BCU (valves, ignition transformer)
are electrically isolated from the mains voltage.
GB-3
187.5
500
1000
400
(3280)
(1312)
–– when the
1500
200
(656)
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