TMCM-3214, TMCM-3215 Hardware Manual (V0.90 / 2016-JUN-27)
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5.4.3 Resistor connector
The TMCM-3214 and TMCM-3215 offer a brake chopper in hardware for limiting supply voltage in case energy is
fed back from motor / driver stage into the supply rail. A two pin Molex MicroFit™ connector (Molex part no.
43650-0215) is used for connecting an external brake resistor. Mating connector housing e.g. Molex 43645-0200,
contacts Molex 43030-0007. Please note that there are alternative options available from Molex for both, housing
and contacts.
Pin
Label
Direction
Power supply
input
Description
1
+48V
Resistor
Connected to power supply input of Power connector.
2
1
Brake chopper output. An external power resistor should
be connected between Pin 1 and Pin 2 of this connector.
2
Output
Table 5.16: Power supply brick: Resistor connector
5.5 Power supply
For proper operation care has to be taken with regard to power supply concept and design. The TMCM-3214 /
TMCM-3215 includes about 6000µF/63V of supply filter capacitors. In addition, the module includes a 48V
suppressor diode for over-voltage protection. Nevertheless, it is important to make sure that supply voltage will
not rise beyond the upper limit of +53V! Please note: during motor deceleration the driver stage might feedback
energy from the motor into the supply rail and supply voltage might increase. In order to limit the supply voltage
a brake chopper circuit has been included on the board. When activated in software and together with an external
power resistor this circuit will limit the supply voltage.
CAUTION
Always keep the power supply voltage (+48V) below the upper limit of 53V!
Otherwise the on-board electronics might be seriously damaged. Especially, when the selected operating
voltage is near the upper limit a regulated power supply is highly recommended. In addition, the on-board
brake chopper may be used together with an external power resistor connected to the Resistor connector in
order to limit supply voltage.
Always keep the digital logic power supply voltage (+48V_LOGIC) below the upper limit of 53V!
Otherwise the on-board electronics might be seriously damaged. Especially, when the selected operating
voltage is near the upper limit a regulated power supply is highly recommended.
Always keep the logic power supply voltage (+48V_LOGIC) above or equal to the main power supply (on
the Power supply connector)!
Otherwise the on-board electronics (diode connection between +48V main power supply input and +48V logic
supply input) might be seriously damaged.
There is limited reverse polarity protection, only!
The module will short any reversed supply voltage.
5.6 RS485
For remote control and communication with a host system the TMCM-3214 provides a two wire RS485 bus
interface. For proper operation the following items should be taken into account when setting up an RS485
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. The TMCM-3214 offers two connectors which are connected directly
to each other and the on-board RS485 transceiver. Using both connectors for passing through the bus
will help with keeping a proper bus topology.
Copyright © 2016, TRINAMIC Motion Control GmbH & Co. KG
TRINAMIC [ TRINAMIC MOTION CONTROL GMBH & CO. KG. ]
