User's Manual

Turbo PMAC PCI HRM
Introduction 5
J9 – Compare Equal Outputs Port (JEQU Port)
The compare-equals (EQU) outputs have a dedicated use of providing a signal edge when an encoder
position reaches a pre-loaded value. This is very useful for scanning and measurement applications.
Instructions for use of these outputs are covered in detail in the PMAC User Manual.
J30 – Optional Analog to Digital Inputs (JANA Port)
This optional port is used to bring in the analog signals for the optional analog to digital inputs set.
This feature provides up to 16 analog inputs in the range of 0 to 5V unipolar or ±2.5V bipolar.
J31 – Optional Universal Serial Bus Port (JUSB Port)
This optional port allows communicating with PMAC through a standard USB connection.
JS1 / JS2 – Expansion Ports (JS1 / JS2 Ports)
These ports are used only when connecting to optional PMAC accessory boards.
TB1 – Power Supply Terminal Block (JPWR Connector)
This terminal block may be used as an alternative power supply connector if PMAC PCI is not
installed in a PCI-bus.
LED Indicators
PMACs with the Option CPU have three LED indicators: red, yellow, and green. The red and green
LEDs have the same meaning as with the standard CPU: when the green LED is lit, this indicates
that power is applied to the +5V input; when the red LED is lit, this indicates that the watchdog timer
has tripped and shut down the PMAC.
The yellow LED located beside the red and green LEDs, when lit, indicates that the phase-locked
loop that multiplies the CPU clock frequency from the crystal frequency on the Option CPU is
operational and stable. This indicator is for diagnostic purposes only; it may not be present on all
boards.
The PMAC PCI has an interlock circuit that drops out the ±15V supplies to the analog outputs
through a fail-safe relay if any supply on PMAC is lost. In this case the green LED D15 will be off.
The D19 LED will be lit when 5V is applied to PMAC.