Delta Tau PMAC2A-PC/104 Instrukcja Obsługi Pobierz pdf (Strona 22)

PMAC2A-PC104 Hardware Manual

Machine Connections

Pulse and Direction (Stepper) Drivers

The channels provided by the PMAC2A-PC/104 board or the ACC-1P board can output pulse and

direction signals for controlling stepper drivers or hybrid amplifiers. These signals are at TTL levels.

Amplifier Enable Signal (AENAx/DIRn)

Most amplifiers have an enable/disable input that permits complete shutdown of the amplifier regardless

of the voltage of the command signal. PMAC's AENA line is meant for this purpose. AENA1- is pin 33.

This signal is an open-collector output and an external 3.3 kΩ pull-up resistor can be used if necessary.

Amplifier Fault Signal (FAULT-)

This input can take a signal from the amplifier so PMAC knows when the amplifier is having problems,

and can shut down action. The polarity is programmable with I-variable Ix25 (I125 for motor #1) and the

return signal is ground (GND). FAULT1- is pin 35. With the default setup, this signal must actively be

pulled low for a fault condition. In this setup, if nothing is wired into this input, PMAC will consider the

motor not to be in a fault condition.

ACC-1P General-Purpose Digital Inputs and Outputs (J7 Port)

ACC-1P J7 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 Accessory 21F is a six-foot cable for this purpose. Characteristics of the JOPTO port on the

PMAC:

• 16 I/O points. 100 mA per channel, up to 24V

• Hardware selectable between sinking and sourcing in groups of 8; default is all sinking (inputs can be

changed simply by moving a jumper; sourcing outputs must be special-ordered or field-configured)

• Eight inputs, and eight outputs only; no changes. Parallel (fast) communications to PMAC CPU

JMACH1

AENA1-

GND

Connect to the

amplifier enable input

FLT_FLG_V

JMACH1

FAULT-

5 – 24 VDC

Power Supply

Connect to the

amplifier fault output

Connect to the stepper

driver command input

JMACH2

PUL_1+

DIR_1+

GND

1 2 ... 17 18 19 20 21 22 23 24 25 26 27 ... 71 72

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