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Operating Guide | VLT® FCD 300 PROFIBUS Converter MCA 117
Brake resistor cable terminals are 1:1 compatible between the FCD 300 EB versions and the FCD 302. If shielded cables are used, ensure
that the shield is mounted as stated in the VLT® Decentral Drive FCD 302 Operating Guide.
FCD 300
81 -
Brake
Resistor
82 +
Illustration 4:
Brake Resistor Cable Connections
The FCD 300 has dedicated connectors 31A and 31B for connection of the motor thermistors. The FCD 302 with MCA 117 installed uses
AI54 as motor thermistor connector. The FCD 302 can also use 1 of the digital inputs as thermistor source, but if multiple sensors are
connected in series, it might cause false alarms/warnings. The motor thermistor configuration is done via parameter 1-90 Motor Thermal
Protection and parameter 1-93 Thermistor Resource.
FCD300
FCM300
31B
31A
Illustration 5:
Motor Thermistor Cable Connection
The 24 V external supply cable terminals are 1:1 compatible between FCD 300 EB versions and the FCD 302. The FCD 302 may draw a
higher current from the 24 V supply. The FCD 300 has a power consumption of 12 W, where the FCD 302 consumes up to 50 W. The
consumption depends on the configuration of the I/O modules and the sensors connected to the drive.
FCD 300
36
36
(+)
(+)
External
24 V DC
back-up
35
35
(-)
(-)
Illustration 6:
External 24 V Cable Connection
3.2.2 Control Signal Connectors
Digital input cable connection
Digital input terminals are 1:1 compatible between the VLT® Decentral Drive FCD 300 and the VLT® Decentral Drive FCD 302. If shielded
cable is used, ensure that the shield is mounted as stated in the VLT® Decentral Drive FCD 302 Operating Guide.
The FCD 300 reads the digital inputs every 12 ms whereas the FCD 302 reads the digital inputs every 1 ms.
Danfoss A/S © 2019.11
FCM 300
FCD 302
81 -
82 +
FCD302
S202
54
50
FCM 300
FCD 302
36
(+)
35
(-)
A54 OFF
36
(+)
35
(-)
Installation
AQ289550754901en-000101 / 130R0890| 13
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