Delta Tau 24E2A, User Manual

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Accessory 24E2A
INTRODUCTION
Overview
The Acc-24E2 Axis Expansion Board provides two or four channels of PMAC2-style servo interface
circuitry for UMAC and Ultralite/MACRO Station controllers. The Acc-24E2 is part of the UMAC or
MACRO Pack family of expansion cards and these accessory cards are designed to plug into an industrial
3U rack system. The information from these accessories is passed directly to either the UMAC or
MACRO Station CPU via the high speed JEXP expansion bus or UBUS. Other axis or feedback UBUS
accessories include the following:
Acc-14E Parallel Feedback Inputs (absolute enc. or interferometers)
Acc-24E2 Digital Amplifier Breakout w/ TTL encoder inputs
Acc-24E2A Analog Amplifier Breakout w/ TTL encoder inputs
Acc-24E2S Stepper Amplifier Breakout w/ TTL encoder inputs
Acc-28E 16-bit A/D Converter Inputs (up to four per card)
Acc-51E 4096 times interpolator for 1Vpp sinusoidal encoders
Acc-53E SSI encoder interface (up to 8 channels)
Note:
Many Acc-24E2A features are common to other accessories of the Acc-24E
family; these common features are referred to in this manual as Acc-24E2.
Up to eight Acc-24E2x boards can be connected to one UMAC providing up to 32 additional channels of
servo interface circuitry. Because each MACRO Station CPU can service only eight channels of servo
data, only two Acc-24E2x boards can be connected to the MACRO-Station. The 16-Axis MACRO CPU
can support four Acc-24E2x cards.
The Acc-24E2 board contains no processor; it has one highly integrated 4-channel PMAC2-style Servo
IC with the buffering circuitry and connectors around them. The two-axis Acc-24E2 plugs into the
backplane and uses one slot in the rack. If two more axes are needed, Acc-24E2 Option 1 can be plugged
into the Acc-24E2 connectors. The Acc-24E2 with its Option 1 card takes up a total of two slots.
Some new features added to the family of Acc-24E2 breakout boards include:
Loss of encoder circuit
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5V to 24V Flag inputs
Pulse and direction outputs for stepper systems or MLDTs
Features
The Acc-24E2A board can be used with any UMAC or MACRO Station CPU, interfacing through the
expansion port.
The Acc-24E2A supports a wide variety of servo and stepper interfaces:
/-10V velocity commands
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/-10V torque commands
Sinusoidal /-10V phase current commands
Pulse-and-direction commands
Introduction 1