7
General Information
Purpose
Intended purpose
The FMS 4 / FMS 5 Combustion Management System is a control unit for
FMS 4 / FMS 5
combustion systems.
Brief description
The FMS 4 adjusts up to four control elements as a function of a control
variable (generally the burner load) according to freely programmable
curves.
The FMS 5 adjusts up to 5 control elements as a function of a control
variable according to freely programmable curves).
2 sets of curves (e.g. for oil or gas) can be filed as standard, with the
option for 4 or 8 sets of curves.
Examples of possible control elements:
- Combustion air damper
- Re-circulation fan
- Combustion air fan
- Flue gas damper
- Fuel quantity
- Flue gas fan
- Atomiser steam
Up to 20 points can be programmed for each channel. The display is
relative between 0 and 999.
The FMS has two correction inputs for shifting the setting curves, allowing
a feedback control (e.g. O control unit) to be connected up.
2
Each output is freely configurable, either three-point step control element
output for direct actuation of a motor or constant output (on the FMS 5
th
the 5 channel is always constant). The constant output can be set to any
of the following variables:
- Current signal 0 … 20 mA
- Current signal 4 … 20 mA
- Voltage signal 0 … 10 V
The FMS 4 also has a so-called monitor output. In addition an internal
value (such as the load position of the burner or position of the gas control
element) can be outputted by means of 4 … 20 mA signal).
The FMS has one serial interface for remote control/ display via PC
(Windows software available separately) and for connection to other
system components via BUS (e.g. fault message system, O control).
2
Connections for Interbus-S, Profibus, Modbus and CAN-
BUS are available as options. Other BUS systems on request.
The FMS constantly monitors its own functioning and that of the control
elements connected.
Each analog input (control variable and feedback or correction) is freely
configurable via plug-in cards.
Alternatively:
- Potentiometer (1 5k
S
)
- Step input (DPS)
- Current signal 0/4 … 20 mA - Namur transmitter as a two-wire system
- PT 100
- inductive sensor with switch terminals in
three-wire system
The unit is of error-proof construction.
