General I/O Configuration
Digital / HSC Input Configuration
NOTE: Refer to the High Speed I/O chapter for more information and refer to the datasheet for X4 [MAN1138] via
the Document Search. For the Voltage Units, refer to MAN1409 for the HE-X4R-V20 or MAN1410 for the HE-X4R-
42.
NOTE: The digital inputs on the X4 are designed for low voltage DC inputs.
The inputs are designed to support both positive and negative input modes. The mode is set by software setting in
Cscape and a configuration parameter also in Cscape. All the inputs on the unit must be configured to the same
mode.
In positive logic mode a positive voltage applied to the input will turn the input. The internal design of this mode is
basically a resistor from the input to I/O ground. This mode is sometimes called sourcing.
In negative logic mode, connecting the input to the I/O ground or zero volts will turn the input on. The internal design
of this mode is basically a resistor from the input to the positive I/O voltage (usually 12 or 24V). This mode is some-
times called sinking.
Some of the digital inputs may support high-speed input functional such as counting or frequency measurement.
Model R &Model A Digital Input J2 Wiring
Page 61 of 163
To Next Page