S t e p C l o c k a n d D i r e c t i o n O u t p u t s
Another key feature offered by the IM805-34P1 is the non-isolated step
clock and direction outputs. These outputs will follow the step and
direction inputs. This allows for multiple drives to be cascaded, with the
primary drive receiving the step/direction signals from the control device,
and the drives connected to the step/direction outputs to follow the
primary. Figure A.4 illustrates a possible connection/application of these
outputs.
These outputs used in this configuration would allow the user to elec-
tronically gear or ratio the drives using the MSEL inputs. For instance,
if the resolution of the primary drive was set to 128 and the secondary
drive set to 256, when a move is commanded, the secondary drive will
move 1/2 the distance and velocity of the primary drive.
GND
Note: Optical isolation is defeated
Figure A.4: Cascading IM805-34P1 Drives Using the Step/Direction Outputs
O p t i o n a l S c r e w Te r m i n a l I n t e r f a c e f o r P 1
The BB-34-4P is an optional breakout board that plugs directly into the pin
receptacle for P1. This gives the user a screw terminal interface to P1. For
drawings and details please see
60 IM805 Operating Instructions Revision R032306
Direction Input
Step Clock Input P1: 4
Step Clock
Step Clock Out P1:21
Oscillator
Direction Out P1:22
+
+5 VDC
as shown in this diagram.
18
1
P1:8
GND P1:27
34 17
18
1
Step Clock In P1:4
Direction In P1:6
P1:8
GND P1:27
34 17
Appendix D: Accessories, BB-34-4P.
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