Technical information

46
230V FX Series Positioning Drive Reference Manual
Input/Output Interface
FX drives are equipped with 8 optically isolated inputs and 4 optically isolated outputs. These
inputs and outputs provide proper timing and coordination between the FX drive’s motion
and other machine control functions. The inputs and outputs are typically connected to the
machine’s PLC or relay logic system. These inputs and outputs can also be connected to limit
switches or switches and indicators on an operator’s control panel.
A wide range of I/O control functions are available. You assign the functions you select to
any of the input/output lines through the PCX software provided with the FX drive or through
serial interface commands. Inputs may be programmed as normally off or normally on. (See
“Input Functions” on page 90 for complete information). Output functions can only operate
as normally off.
Input and output wiring from your system is connected to detachable terminal strips on the
FX drive. Each input and output on the FX drive is designed for high noise immunity.
However, care should be taken to route the I/O wiring away from potential noise sources.
Precautions outlined in “Electrical Noise” on page 27” should be followed.
Failure to follow safe installation guidelines can cause death or serious injury. To improve
noise immunity, EMERSON Motion Control recommends using twisted pair wire for
I/O wiring. In extremely electrically noisy environments, shielded twisted pairs should
be used with the shield connected to the safety ground via a low impedance conductor.
An LED indicator on the front panel of the FX drive is associated with each input and output.
The input and output indicators will illuminate if current is flowing in the associated line and
the drive is powered.
Failure to follow safe installation guidelines can cause death or serious injury. 18 to 24
gauge wire should be used for I/O wiring. The use of larger gauge wire can cause the I/O
terminals to prematurely fatigue. DC common should be grounded to the single point
ground. Tinning the stripped ends of the wire may also cause premature fatigue.
The DC Common of the I/O power supply must be grounded to the safety ground.
The basic drive I/O can be configured from a list of 46 input functions and 22 output
functions. When an application module is added, the number of available I/O functions is
increased and the number of available lines is doubled.They are designed to operate at +10.5
to +30 VDC. Each input and output line has 2 screw terminals to provide either sinking or
sourcing operation. The first 8 pairs of designated terminals are inputs and the last 4 pairs of
terminals are outputs (see Figure 34: "Input/Output Connections" ).
Each input line requires a minimum current of 2-3 mA. at +10.5 VDC (maintained for a
minimum of 3 msec) to be recognized as a valid input. Maximum input current is 30 mA. The
outputs are capable of sinking or sourcing 200 mA.