Trinamic TMCM-3351, Руководство по оборудованию

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TMCM-3351 Hardware Manual • Hardware Version V1.00 | Document Revision V1.00 • 2017-SEP-01 19 / 31
node
n - 1
node
n
Slave Slave
termination
resistor
(120 Ohm)
+5V
GND
pull-up (680R)
pull-down (680R)
RS485- / RS485B
RS485+ / RS485A
Figure 8: RS485 bus lines with resistor network
7.2 USB
For remote control and communication with a host system the TMCM-3351 provides a USB 2.0 full-speed
(12Mbit/s) interface (USB Type B connector). As soon as a USB-Host is connected the module will accept
commands via USB. The TMCM-3351 supports USB self powered operation (External power supplied via
the power supply connector) and USB bus powered operation, also (no external power is supplied via
the power supply connector). During USB bus powered operation, only the core digital circuit parts will
be operational. That is, the microcontroller itself and also the EEPROM. Of course, any motor movement
will not be possible in this mode. This mode has been implemented in order to enable configuration /
parameter setting / read-out, firmware updates etc. by just connecting a USB cable between the module
and a host PC. No other connection / additional power supply is required.
7.3 CAN
For remote control and communciation with a host system the TMCM-3351 provides a CAN bus interface.
For proper operation the following items should be taken into account when setting up a CAN network:
1.
BUS STRUCTURE:
The network topology should follow a bus structure as closely as possible. That is, the connection
between each node and the bus itself should be as short as possible. Basically, it should be short
compared to the length of the bus.
c:>
node
1
node
n
- 1
node
n
Host
Slave Slave Slave
CAN
termination
resistor
(120 Ohm)
termination
resistor
(120 Ohm)
}
keep distance as
short as possible
Figure 9: CAN bus structure with termination resistors
2.
BUS TERMINATION:
Especially for longer busses and/or multiple nodes connected to the bus and/or high communication
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