Applied-motion STM23C-3CE Manual do Utilizador descarregar pdf (Página 17)

NOTE: To use the STM23 RS-422/485 version with the ST Congurator soware, the STM23 must be con-

nected to the PC in the four-wire “point to point” conguration (see below) and congured one axis at a

time.

RS-422/485 4–wire “Point to Point” Wiring

RS-422/485 Connector diagram

Four-Wire Conguration

Four-wire systems utilize separate transmit and receive wires. One pair of wires must connect the host’s transmit signals to

each drive’s RX+ and RX- terminals. e other pair connects the drive’s TX+ and TX- terminals to the host’s receive signals.

A logic ground terminal is provided on each drive and can be used to keep all drives at the same ground potential.

is terminal connects internally to the DC power supply return (V-), so if all the drives on the RS-422/485 network are

powered from the same supply it is not necessary to connect the logic grounds. One drive’s GND terminal should still be

connected to the host ground.

RS-422/485 4–wire system

NOTE: a 120 ohm terminating resistor is required at the end of a four wire network.

NOTE: If the PC does not have an RS-422/485 serial port, a converter will be required.

+Rx- +Tx- GND +Rx- +Tx- GND +Rx- +Tx- GND

to Host Tx+

to Host Tx-

to Host Rx+

to Host Rx-

to Host GND

Drive 1 Drive 2 Drive n

120

GND

TX–

TX+

RX–

RX+

+Rx- +Tx- GND

to Host Tx+

to Host Tx-

to Host Rx+

to Host Rx-

to Host GND

STM24

STM23 Hardware Manual

920-0021F

2/14/2012

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Applied-motion STM23C-3CE Manual do Utilizador Página 17