Delta Tau PMAC2 User Manual download pdf (Page 27)

Turbo PMAC2 Realtime Express Controller

Hardware Setup

Thumbwheel Multiplexer Port (JTHW Port), J10

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

J10 Thumbwheel Port

26 Pin IDC Header Reciprocal

Pin #

Symbol

Function

Description

Notes

GND

Common

PMAC Common

GND

Common

PMAC Common

DAT0

Input

Data-0 Input

Data input from multiplexed accessory

SEL0

Output

Select-0 Output

Multiplexer select output

DAT1

Input

Data-1 Input

Data input from multiplexed accessory

SEL1

Output

Select-1 Output

Multiplexer select output

DAT2

Input

Data-2 Input

Data input from multiplexed accessory

SEL2

Output

Select-2 Output

Multiplexer select output

DAT3

Input

Data-3 Input

Data input from multiplexed accessory

SEL3

Output

Select-3 Output

Multiplexer select output

DAT4

Input

Data-4 Input

Data input from multiplexed accessory

SEL4

Output

Select-4 Output

Multiplexer select output

DAT5

Input

Data-5 Input

Data input from multiplexed accessory

SEL5

Output

Select-5 Output

Multiplexer select output

DAT6

Input

Data-6 Input

Data input from multiplexed accessory

SEL6

Output

Select-6 Output

Multiplexer select output

DAT7

Input

Data-7 Input

Data input from multiplexed accessory

SEL7

Output

Select-7 Output

Multiplexer select output

N.C.

No Connection

GND

Common

PMAC Common

N.C.

No Connection

GND

Common

PMAC Common

N.C.

No Connection

GND

Common

PMAC Common

+5V

Output

+5VDC Supply

Power Supply output

INIT-

Input

PMAC Reset

Low is Reset

The JTHW multiplexer port provides 8 inputs and 8 outputs at TTL levels. While these I/O can be used in

unmultiplexed form for 16 discrete I/O points, most users will utilize PMAC software and accessories to

use this port in multiplexed form to greatly multiply the number of I/O that can be accessed on this port. In

multiplexed form, some of the SELn outputs are used to select which of the multiplexed I/O are to be

accessed.

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Delta Tau PMAC2 User Manual Page 27

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