Applied Motion STAC6-C - Manual (Page 22)

22
STAC6 Hardware manual 920-0029 Rev. C
5/2/2012
Connecting an Encoder
The motors recommended for use with STAC6 drives are available with rear-shaft mounted encoders. Note:
remember to always order a double-shaft motor if you need an encoder option. The mating cables available
for these encoders come with an HD-15 connector on one end that connects directly to the Encoder connec-
tor on the STAC6, and a mating connector on the other end that connects directly to the encoder. Simply
connect the cable between the encoder and the drive and you’re done. For applications where you might use
your own encoder, you’ll need to connect to the STAC6 drive’s encoder connector using the pin assignments
below.
encoder Z+ (5)
NC (10)
encoder B- (4)
NC (9)
encoder B+ (3)
NC (13)
NC (14)
NC (15)
(12) NC
(11) NC
(6) encoder Z-
(1) encoder A+
(7) +5VDC 200mA
(2) encoder A-
(8) GND
If you are using an encoder with single ended outputs, shame on you. Differential connections are far less
sensitve to electrical interference and life is too short to waste time deciphering the bizarre problems that
can occur with a poor quality encoder. That said, single ended encoders should be connected to the A+ and
B+ terminals. Leave A- and B- unconnected. They are internally biased to the proper voltage for best results.
You’ll also need to select the “single ended” box in the Encoder button of STAC Configurator™ or the drive
will think you have a broken encoder wire. That’s another good reason to use a differential encoder, the
STAC6 can detect a broken wire or bad signal and alert you to the problem.