Hardware Reference Manual
Hardware Reference Summary
37
Connectors and Indicators
J2 - 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.
1. 26-pin female flat cable connector T&B Ansley P/N 609-2641
2. Standard flat cable stranded 26-wire T&B Ansley P/N 171.26
3. Phoenix varioface module type FLKM 26 (male pins) P/N 22 81 05 0
J3 - Machine Connector (JMACH1 Port)
The primary machine interface connector is JMACH1, labeled J3 on the PMAC. It contains the pins for
four channels of machine I/O: analog outputs, incremental encoder inputs, amplifier fault and enable
signals and power-supply connections.
1. 50-pin female flat cable connector T&B Ansley P/N 609-5041
2. Standard flat cable stranded 50-wire T&B Ansley P/N 171-50
3. Phoenix varioface module type FLKM 50 (male pins) P/N 22 81 08 9
J4 - Machine Connector (JMACH2 Port)
This machine interface connector is labeled JMACH2 or J4 on the PMAC. It contains the pins for four
channels of machine I/O: end-of-travel input flags, home flag and pulse-and-direction output signals. In
addition, the B_WDO output allows monitoring the state of the Watchdog safety feature.
1. 34-pin female flat cable connector T&B Ansley P/N 609-3441
2. Standard flat cable stranded 34-wire T&B Ansley P/N 171-34
3. Phoenix varioface module type FLKM 34 (male pins) P/N 22 81 06 3
J7 - General-Purpose Digital Inputs and Outputs (JOPT Port)
Acc-1P’s JOPT 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.
1. 34-pin female flat cable connector T&B Ansley P/N 609-3441
2. Standard flat cable stranded 34-wire T&B Ansley P/N 171-34
3. Phoenix varioface module type FLKM 34 (male pins) P/N 22 81 06 3
J8 – Handwheel / Pulse and Direction Port (JHW / PD Port)
This port provides an extra encoder input or a set of pulse and direction outputs, and its function is
selectable by jumpers.
1. 10-pin female flat cable connector T&B Ansley P/N 609-1041
2. Standard flat cable stranded 10-wire T&B Ansley P/N 171-10
3. Phoenix varioface module type FLKM 10 (male pins) P/N 22 81 01 8
TB1 – Power Supply Terminal Block (JPWR Connector)
In almost in all cases the PMAC2A PC/104 will be powered from the PC/104 bus when it is installed in a
host computer’s bus, or from the JMACH1 connector. This terminal block may be used as an alternative
power supply connector or to easily measure the voltages applied to the board.
1. 4-pin terminal block, 0.150 pitch
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