STAC6 Drives and Microstepping Motors:
User Manual
(Discontinued Product)
• 4.9 •
4:
S T A N D A R D A C C E S S O R I E S & O P T I O N S
CABLE ROUTING
The
HUB
[SiNET™ HUB 444]
makes it easy to create multi-axis
distributed systems which require both sensitive network
communication cables and high power cables for each remote axis.
These two classes of cables should not be run together in a
common conduit or raceway.
PROGRAMMABLE INPUTS
The
HUB
[SiNET™ HUB 444]
provides four digital inputs for external
equipment such as sensors, switches and other electronics. These
inputs are optically isolated, and allow a wide range of input
voltages to be used. Each input provides the option of using sinking
or sourcing signals.
A schematic diagram of the input circuit is shown below.
LEDs on the input side of the optoisolators require a current of
5-24 volts DC. Most CMOS and open collector TTL devices are
directly compatible with this drive, as are typical PLC and proximity
sensor outputs.
Figure 4.4: Programmable Input Circuit Schematic Diagram
SINKING CIRCUITS (NPN)
If the output devices prefer to sink current, then connect the “+”
terminals to the positive power supply, and the “-” terminals to the
signals. When using a TTL circuit to drive the hub inputs, connect
the “+” terminals to the 5 volt bus. No ground connection is needed.
If a PLC or proximity sensor is used, a power supply is required.