Hardware Reference Manual
Machine Connections
14
When used as non-multiplexed I/O, jumpers E7 and E8 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.
Handwheel Port (JHW / PD Port)
This port provides an extra encoder input or a set of pulse and direction outputs. Jumpers E3 and E4 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.
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.
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