User Manual

TMCM-3230 Hardware Manual • Hardware Version V1.30 | Document Revision V1.20 • 2019-MAR-01

11 / 22

an alternative to the other serial interfaces. Please note that the module might draw current via the USB

connection in this mode, also.

USB Connector

Figure 8: TMCM-3230 USB Connector

4.3 CAN Connection

For remote control and communication with a host system the TMCM-3230 provides a CAN bus interface

with on-board CAN transceiver. For proper operation the following items should be taken into account

when setting up a CAN network:

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.

Figure 9: CAN Bus Structure

Bus Termination

Especially for longer busses and/or multiple nodes connected to the bus and/or high

communication speeds, the bus should be properly terminated at both ends. The TMCM-3230 does not

integrate any termination resistor. Therefore, 120 Ohm termination resistors at both ends of the bus have

to be added externally.

Number of Nodes

The bus transceiver used on the TMCM-3230 (TJA1051) supports at least 100 nodes

under optimum conditions. Practically achievable number of nodes per CAN bus highly depend on bus

length (longer bus = less nodes) and communication speed (higher speed = less nodes).

Terms of delivery and rights to technical change reserved.

Download newest version at www.trinamic.com