Specifications

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3401 Manual
Point I/O Stepper Module
Revision 2.0
Wiring Notes:
• Stepper signals are generally low voltage, low power signals. If you are using A-B guidelines for
cabling installation, treat the cable as a Category 2 cable. It can be installed in conduit along with
other low power cabling such as communication cables and low power ac/dc I/O lines. It cannot
be installed in conduit with ac power lines or high power ac/dc I/O lines.
• To reduce or eliminate the influence of electrical noise on the system, the step and direction cable
shields must be connected to chassis ground terminal 5. Also, the shields must be connected to
only one end of the cable run and treated as conductors at any junctions. Do not ground the
shields at the junction box.
• If the signal cable must cross power feed lines, it should do so at right angles.
• Route the cable at least five feet from high voltage enclosures, or sources of “rf” radiation.
• The Module Common should be connected to the COM of the supply that powers the discrete
inputs. A Stepper Driver with Single Ended Step and Direction inputs can also be referenced here.
• The Chassis Ground pin is connected to the PLC’s chassis ground.
• POINT I/O is grounded through the DIN rail to chassis ground. Use zinc plated, yellow chromated
steel DIN rail to assure proper grounding. Using other DIN rail materials (e.g. aluminum, plastic,
etc.) that can corrode, oxidize or are poor conductors can result in improper or intermittent
platform grounding.