PI C-844
========

Serial communication using the GreensSpring XM Octal I/O.
---------------------------------------------------------

The GreensSpring XM Octal I/O has a 16 pin jumper block for each serial port.
Assume (the manual does not define this) that the jumper pins are numbered
from, top to bottom, and from left to right; i.e.,
    1  2  3  4
    5  6  7  8
    9 10 11 12
   13 14 15 16
   
Then the "Default jumbering ..." depicted in Fig. 2 of the GreensSpring XM
Octal I/O manual is jumpered as follows; 1-5, 2-6, 9-13, 10-14.

The correct jumpering for the C-844 is; 1-2, 5-6, 13-16.

M-111.12S stage to ACS driver adapter
=====================================

DB15  ELCO   Func.
----  ----   -----
 1    A      ph1+
 9    E      ph1-
 2    C      ph2+
10    H      ph2-
 6    V      +5V
14    W      lim+
 7    T,U,R  Gnd
 8    X      lim-