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Digital Input Signals

The Facilities Panel includes 12 general-purpose optically isolated digital input signals (in addition to those signals that are available at the Z-Axis IO Board). These lines are accessed in a single DB15 connector (Figure 34-158).

Figure 34-158: DB15 Connector

These input signals can be configured as "sinking" or "sourcing." If an input signal is configured as "sinking" (Figure 34-159), the external equipment must provide a 5 VDC to 24 VDC voltage to indicate a logical high value or must allow it to float to no voltage for a logical low. This configuration is compatible with "sourcing" (PNP) sensors.

Figure 34-159: Sinking Input Signal

As shipped from the factory, the input signals are configured as "sourcing" (Figure 34-160), i.e. the external equipment must pull a signal input pin to ground to indicate a logical high and must let the line float high to 24 VDC to signal a logical low value. This configuration is compatible with "sinking" (NPN) sensors.

Figure 34-160: Sourcing Input Signal

Inputs can be configured as sinking or sourcing in groups of four signals. To configure groups of input signals, the X-axis rear cover must be removed and jumpers on the Guidance Controller must be changed. For more information on configuring the jumpers, see the Guidance 3000/2000 Controller User Manual.

Electrical Shock
Improper electrical connection or connection to an improper electrical supply can result in electrical shock, burns, fire, damage to the equipment, and serious injury or death. The Guidance 3400, the PrecisePower Intelligent Motor Power Supply, and the 24 VDC power supply are all open frame electrical devices that contain unshielded high voltage pins, components and surfaces. In addition, the motor power supply provides up to 320 VDC volts and takes about 2 minutes to bleed down after power is disconnected Disconnect the main AC power before removing the back cover of the X-axis.

The pinout for the Digital Input Connector and the corresponding GPL signal numbers are described in Table 34-120, which includes the jumper settings for the PrecisePower 500 W Intelligent Motor Power Supply: