Delta Tau PMAC2A-PC/104 - Manual (Page 24)

PMAC2A PC104 Hardware Reference Manual
Machine Connections 18
When used as non-multiplexed I/O, jumpers E7 and E8 on the Acc-2P board select the I/O lines direction
of the JTHW connector. This allows configuring this port as all inputs, all outputs or half inputs and half
outputs. If E7 is removed or E8 is installed then the multiplexing feature if the JTHW port cannot be
used.
Acc-1P or Acc-2P Handwheel Port (JHW / PD Port)
This port provides an extra encoder input or a set of pulse and direction outputs. Jumpers E3 and E4 on
either the Acc-1P or Acc-2P boards select the function of this connector between encoder input or pulse
and direction outputs. The handwheel encoder input can be linked to a servomotor for manual
displacement or used by a motor as a secondary encoder for dual-feedback applications. There is no C
index channel input on the handwheel encoder port. The pulse and direction outputs can be used, for
example, to control an external laser device but not a stepper driver\motor, since this would require more
than eight axes of motion control.
Optional Analog Inputs
The optional analog-to-digital converter inputs are ordered either through Option-12 on the baseboard or
Option-2 on the axes expansion board. Each option provides two 12-bit analog inputs analog inputs with
a ±10Vdc range.
Compare Equal Outputs
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 PMAC2 User Manual.