Servodrives / inverters series COSMOS 301X Installation, use and maintenance manual - EN
5.8.2 FLxIO versions
These versions of servo-driver/inverter are equipped with an interface for FLxIO field bus. This bus, based on
a RS485 electrical non-insulated interface, performs a reliable, real-time control of complex applications. The
connections are made by means of RJ45 connectors, situated on the front panel; the following picture
indicates the pin configuration.
FLEXIO field bus
connector J1
connector J2
pin signal pin signal
1 DATA+ 1 DATA+
2 DATA- 2 DATA-
3 GND 3 GND
4 NC 4 NC
5 NC 5 NC
6 NC 6 NC
7 Internal use 7 Internal use
8 Internal use 8 Internal use
This field bus requires standard cables, Ethernet CAT 5E type, with RJ45 connectors; in order to avoid
dangerous reflections, a termination resistor is necessary at the end of the chain. To this purpose, a solution
for automatic termination has been implemented: the last device in the chain (J2 port is not used on the last
slave) detects the lack of cable on the J2 port and automatically activates the termination. By contrast, if
further devices are installed downstream, the termination is automatically disconnected by the servo-drive. In
this way, only the last device terminates the cable; the other end is terminated by the master device.
Each slave in a FLxIO bus must have its address, which can be modified in a very easy way. To this
purpose, the servo-drive is equipped with a rotary switch (on the front panel), with 16 different positions (from
0 to F, in hexadecimal notation). The address can be set by means of a flat-head screwdriver. The following
table shows the correspondence between decimal and hexadecimal values:
Decimal 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
Hexadecimal 0 1 2 3 4 5 6 7 8 9 A B C D E F
Ver. 1.09 SMITECdd 60/74
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