BFI Automation 3001D, Original Operating Instructions

Page: 38 / 49

Description
5-6
5.1.8 Signal outputs
The potential-free relay contact for the "Flame on / off"
message is internally protected by a fine wire fuse
(T 1
amp). This prevents a fusing of contacts. When the device
has been plugged-out, the fuse is accessible and can be
replaced, if and when necessary.
When the burner has been switched off, the RF and RM
LEDs must no longer be lit. The analogue signal on the
bar-graph display has to have dropped to below 25%.
In order to indicate the flame intensity externally, 0 to 20
mA or 4 to 20 mA are available at the pin connectors c18
(+) and c14 (-). The device has been factory set to 0 to 20
mA, and the two bridges X4 and X6 are closed. If 4 to 20
mA are required, the bridges X4 and X6 have to be
opened. The permissible load must not exceed a maxi-
mum of 360 ohm.
The pin connector a18 (+15 VDC, 10 mA maximum) can
be set to handle two different signals. The information
Time 1 or Time 2 active (factory setting) or the Safety
channel feedback can be used.
A short-circuit-proof output on pin connector c16 (+24
VDC, 100 mA maximum load) is used for the pre-alarm
warning.
5.1.9 Impuls divider
The flame amplifier is equipped with an adjustable reduc-
tion of the input signal. Set an impuls divider ratio in three
steps with jumper T, 1:1, 1:2 and 1:4. The flame amplifier
processes the proportionately reduced signal.
The flame signal will be reduced after increasing the divid-
ing factor. The digital indicator sisplays the reduced im-
puls value of the input signal after dividing stage.