BFI Automation 3016, Original Operating Instructions

Page: 41 / 56

Description
5-7
5.7 Wiring
The 24 V DC power supply is internally protected by a
500mA fuse which is soldered on the PCB. The dimen-
sion of the fuse is of such a value that a flame scanner
could be connected at the same line. A damage of the
fuse is only expected by a defect of the system or by a
wrong wiring. An additional possibility for a damage of the
fuse might be transients on the power supply line which
be suppressed by an internal EMC protection circuit. In
those cases please send the flame amplifier back to our
factory for a complete function check and for checking the
EMC protection. Flame scanner and current output will be
supplied with the same 24 V DC. If necessary a decoup-
ling network between current output and BMS has to be
used. All relay contacts are dry contacts.
5.8 Galvanic decoupling
The relais contacts of K1, K2 and K5 are connected to in-
ternal power supply by factory. A galvanic decoupling for
the in- and outputs of the DCS is possible. If the galvanic
decoupling is necessary the jumper X2 and X3 can be
opened.
K1 = failure relay
K2 = signalling relay sensitivity II
K5 = Changeover relay for sensitivity I/II
By using the back panel 3001 the galvanic decoupling
cannot be realized, cause the needed connectors a20 and
a24 can’t be reached.
Both relays Safety and auxiliary are connected SPDT to
the connector. See wiring diagram.