Honeywell PFA 700, Техническая информация, Страница: 8 / 28

PFA, BGT · Edition 03.11l 8
Function
3 Function
DI
L1, N, PE
P
BUS
…
PFU PFU PFU PFU PFU PFU PFU PFU PFU
PFA
BUS
…
PFU PFU PFU PFU PFU PFU PFU PFU PFU
PFA
BUS
PROFIBUS-DP
PLC
The field bus interface PFA 700 integrates up to nine
burner control units PFU 760 into industrial commu-
nication networks using PROFIBUS DP. The PFA 700
is plugged into the pre-wired module subrack BGT SA-
9U/1DP700, together with the burner control units.
The field bus interface PFA 710 integrates up to eight
burner control units PFU 780 into industrial commu-
nication networks using PROFIBUS DP. The PFA 710
is plugged into the pre-wired module subrack BGT SA-
8U/1DP710, together with the burner control units.
To the rear of the module subrack, there is a D-Sub
socket for connection to PROFIBUS DP and connection
terminals in order to send input and output signals to
ignition transformers, gas and air valves or UV sensors,
for example, via the individual burner control units PFU.
PROFIBUS DP
PROFIBUS is a manufacturer-independent, open field-
bus standard for diverse applications.
PROFIBUS DP is a bus variant for communication be-
tween automation systems and distributed peripherals
at the field level, optimized for speed and low connec-
tion costs.
On PROFIBUS DP, the individual bus stations are con-
nected via a 2-core shielded cable as standard.
The bus system transfers the control signals for start-
ing, resetting and for controlling the air valve to purge
the furnace or kiln or for cooling in start-up position
and heating during operation from the control system
(PLC) to the PFA. In the opposite direction it sends in-
formation on the operating status.
3 .1 Safety-related control signals
Control signals for the safety interlocks and digital in-
put are transferred independently of the bus communi-
cation by separate cables.