WOODWARD 9905-799 Serial Link Controller
Quadrature encoder inputs can be brought into the ACC-8E either through terminal blocks or 10- pin headers. These signals are not isolated from the PMAC2. The inputs are tied directly to 5V differential line receivers on the PMAC2.
The main (non-complementary) lines have 1 kΩ pullup resistors;
the complementary lines are tied to 2.5V (reversing a SIP on the PMAC2 converts this to a pull-up). The complementary lines must be left floating if single-ended inputs are used. The 5V supply for the encoder can be provided through the headers or terminal blocks. If optical isolation of the encoder signals is desired, the ACC-8D Option 6 Isolator board may be used in conjunction with the ACC-8E board.
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