13 stac6 hardware manual – Applied Motion STAC6-C User Manual
Page 13
13
STAC6 Hardware manual
920-0029 Rev. C
5/2/2012
STAC6 drives include a “transmit delay” parameter that can be adjusted to compensate for a host that is slow
to disable its transmitter. This adjustment can be made over the network using the TD command, or it can
be set using the STAC Configurator™ software. It is not necessary to set the transmit delay in a four wire
system. We recommend a 120 ohm terminating resistor be connected between the two transmit / receive
wires at the farthest drive from the host.
+RX- +TX- GND
+RX- +TX- GND
+RX- +TX- GND
to PC TX+ (B)
to PC TX- (A)
to PC GND
Drive #1
Drive #2
Drive #3
120
RS-232 to RS-485 2-wire Converter
Model 485-25E from
(800-450-2001) works well for converting your PC’s RS-232 port
to RS-485. It comes with everything you need. Connect the adaptor’s “B” pin to the drive’s TX+
and RX+ terminals. Connect “A” to the drive’s TX- and RX- terminals.
Converting USB to RS-485
used with 2 wire or 4 wire systems.
For two wire RS-485, set SW1 to ON and SW2-4 to OFF. On the USB-COMi-M screw terminal connector:
Pin1 goes to RX- and TX-.
Connect pin 2 to RX+ and TX+.
Pin 6 is ground.
The DB-9 is not used.
For four wire RS-485, set SW1,3,4 to ON and SW2 to OFF. On the USB-COMi-M screw terminal connector:
USB-COMi-M
STAC6
Drive
pin 1
RX-
pin 2
RX+
pin 3
TX+
pin 4
TX-
pin
6
GND