Product Introduction

PMAC’s Accessory 24, the Axis Expansion board, provides four or eight additional channels of quadrature encoder inputs, analog outputs, data lines for analog inputs, and motor related flags (Limits, Home Flags, Amplifier Enables, Amplifier Faults, and position Compare-Equal signals). This Accessory is intended for applications which require more than the basic eight channels of the above signals provided on the PMAC base board (when used with its Option 1). In particular, PMAC’s dual feedback servo capability or its motor commutation feature for more than four position loops require Acc-24. This is because, in both of the above applications, two channels of encoder feedback signals, or two analog output channels, respectively, are required for each motor. In addition, in applications which require some extra Master / Handwheel encoder inputs Acc-24 may also be required.
Acc-24 comes in two forms: Acc-24P for PMAC PC and Acc-24V for PMAC VME. The STD bus version of PMAC is not supported with this Accessory. This Manual deals with Acc-24P which is to be used in conjunction with PMAC PC. For the VME bus version of this Accessory a separate manual is provided. 

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