User's Manual

PMAC VME Hardware Reference Manual
PMAC Basic Specifications 41
Option 3:
Port A is high-true latched TTL inputs (24)
Port B is high-true latched TTL inputs (24) (Typically this option is for parallel feedback.)
Option 4 - Custom Configurations: If one of the above configurations is not suitable, a customized
configuration is possible under Option 4.
In selecting Option 4, each byte should be specified as to input option or output option. These options are
detailed as follows (the IC used for each option is provided for reference):
Input Options:
I1: 14-25V inverting unlatched inputs (ULN2802A) (external voltage source required)
I2: 6-15V inverting unlatched inputs (ULN2804A) (external voltage source required)
I3: 5V non-inverting unlatched inputs (74AC573)
I4: 5V inverting unlatched inputs (74AC563) (for input from OPTO-22)
I5: 5V non-inverting edge-triggered inputs (74AC574) (for absolute encoders)
Output Options:
O1: 5-24V inverting open-collector (sinking) outputs (ULN2803A) (external source may be required)
O2: 5-24V non-inverting sourcing outputs (UDN2981A) (external source may be required)
O3: 5V non-inverting sinking/sourcing outputs (74AC573)
O4: 5V inverting sinking/sourcing outputs (74AC563) (for output to OPTO-22)
For example, to use Port A for an absolute encoder input and Port B for 16 bits of OPTO-22 output and 8
bits of OPTO-22 input, specify:
Acc-14D with Option 4: Bytes 1:I5, 2:I5, 3:I5, 4:O4, 5:O4, 6:I4.
Of course, it is possible to set up incompatible configurations; for example, I1 and O3 could not work on
the same port together because of voltage differences.
A configuration sheet is available and should be completed by the customer when ordering a custom
configuration, in order to create a permanent configuration record as well as to avoid misunderstandings.
Accessory 16D: Control Panel And Display Box
The Acc-16D control panel provides all the means for using PMAC’s dedicated hardware control inputs
and display outputs. It has nine toggle switches for the hardware functions, a 10-way rotary switch for
motor-/coordinate-system-select (1 to 8, all, and none), a handwheel encoder, an analog potentiometer, a
frequency generator, a 2x40 character alphanumeric LCD display, and five status LEDs. Comes with two
180 cm (6') cables, one 26-pin and one 16-pin.
Accessory 17: PMACAD Cad Conversion Software
This accessory is a program for IBM PC and compatible computers that converts a CAD file to the
PMAC motion language. No PMAC need be attached for this conversion program to run.
The Acc-17 is a once-per-customer purchase. OEMs wishing to re-sell the program to their customers
must purchase one copy for each customer. Such OEMs should contact the factory for volume purchase
agreements.
Accessory-17DA:
PMACAD Conversion Program on 3.5" diskette.
Accessory 18: Thumbwheel Multiplexer Board
This accessory is a printed circuit board that provides the needed circuitry for PMAC to interface to 16
thumbwheel switches or similar inputs. Up to 32 thumbwheel multiplexer boards can be daisy-chained
together to permit the reading of up to 512 thumbwheel digits or other TTL level inputs (256 bytes).
Thumbwheels may be mounted directly on the board, or can be remotely connected to it. Alternatively,
8-position dip switches may be mounted on the board for input.