Reference Manual

Unit Description, FCU-01
The FCU has the following external interfaces:
•
Power in
•
EPC-bus in
•
EPC-bus out
•
Fan power and alarm (1 – 4)
13.3 Indicator
The FCU has seven LED indicators that show the status of the FCU, its
communication and fan status.
Table 104 Indicator
Indicator
Colour
Fault Red
Operational Green
EPC-bus fault
Yellow
Fan 1 fault
Red
Fan 2 fault Red
Fan 3 fault Red
Fan 4 fault Red
13.4 Electrical Data
13.4.1 Input Data
Table 105 Input data
Nominal Input Voltage +24.0 V DC
Input Voltage Range +19.0 to +29.0 V DC
Non-Destructive Voltage
0.0 to +32.0 V DC
Input Power 4 x 45 W
13.4.2 Output Data
Table 106 Output data
Output Voltage Zero and 9 - 28.3 V DC
Output Current
Min. 1.8 A between 9 - 28.3 V DC
13.4.3 Fan Alarm
There is one alarm signal for each fan. The alarm circuit is normally
closed.
An open circuit indicates that the fan speed is too low. The fan has an
open collector interface.
180 (485)
EN/LZT 720 0008 P2A
2001-11-28
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