Reference Manual

PMAC PCI-Lite Hardware Reference Manual
28 Hardware Reference Summary
Connectors and Indicators
J1 - Display Port (JDISP Port)
The JDISP connector allows connection of the Acc-12 or Acc-12A liquid crystal displays, or of the Acc-
12C vacuum fluorescent display. Both text and variable values may be shown on these displays using the
DISPLAY command, executing in either motion or PLC programs.
J2 - Control-Panel Port (JPAN Port)
The JPAN connector is a 26-pin connector with dedicated control inputs, dedicated indicator outputs, a
quadrature encoder input, and an analog input (requires PMAC Option 15). The control inputs are low
true with internal pull-up resistors. They have predefined functions unless the control-panel-disable I-
variable (I2) has been set to 1. If this is the case, they may be used as general-purpose inputs by assigning
M-variable to their corresponding memory-map locations (bits of Y address $FFC0).
J3 - Thumbwheel Multiplexer Port (JTHW Port)
The Thumbwheel Multiplexer Port, or Multiplexer Port, on the JTHW connector has eight input lines and
eight output lines. The output lines can be used to multiplex large numbers of inputs and outputs on the
port, and Delta Tau provides accessory boards and software structures (special M-variable definitions) to
capitalize on this feature. Up to 32 of the multiplexed I/O boards may be daisy chained on the port, in
any combination.
J4 - Serial Port (JRS422 Port)
For serial communications, use a serial cable to connect the PC’s COM port to the PMAC’s serial port
connector. Delta Tau provides the accessory 3D cable for this purpose, which connects PMAC to a DB-
25 connector. Standard DB-9-to-DB-25 or DB-25-to-DB-9 adapters may be needed for a particular setup.
J5 - General-Purpose Digital Inputs and Outputs (JOPTO Port)
PMAC’s JOPTO connector provides eight general-purpose digital inputs and eight general-purpose
digital outputs. Each input and each output has its own corresponding ground pin in the opposite row.
The 34-pin connector was designed for easy interface to OPTO-22 or equivalent optically isolated I/O
modules. Delta Tau’s Acc-21F is a six-foot cable for this purpose.
J6 – Expansion Port (JXIO Port)
This port is used only when connecting to optional PMAC accessory boards.
J8 - Machine Connectors (JMACH Port)
The primary machine interface connector is JMACH, labeled J8 on the PMAC. It contains the pins for
four channels of machine I/O: analog outputs, incremental encoder inputs, and associated input and
output flags, plus power-supply connections.
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 useful for scanning and measurement applications.
Instructions for use of these outputs are presented in the PMAC’s User Manual.
J17 - Serial Port (JRS232 Port)
This connector applies only to the turbo version of the PMAC PCI Lite board. It allows PMAC to
communicate through its auxiliary RS232 serial port.
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.