User's Manual

Geo MACRO Drive User Manual
38 Connections
Connecting Secondary Quad. Encoders (X8 & X9)
Secondary encoders in the Geo MACRO Amplifier are standard since logic board revision -10A and
above, and are found on Db-connectors X8 and X9. They must be Quadrature TTL encoders.
Hardware Setup
The Geo Drive also accepts inputs from two
digital quadrature encoders and provides
encoder position data to the motion
processor. X8 is secondary encoder #1 and
X9 is secondary encoder #2. The
differential format provides a means of
using twisted pair wiring that allows for
better noise immunity when wired into
machinery.
Geo Drives encoder interface circuitry
employs differential line receivers. The
wiring diagram on the right shows an
example of how to connect the Geo drive to
a quadrature encoder.
Function Pin #
ChA+ 1
ChA- 6
ChB+ 2
ChB- 7
ChC+ 3
ChC- 8
ENCPWR 5V 4
GND 5
2
3
4
5
6
7
8
9
1
Encoder
Shield
GND
5V
CHA+
CHA-
CHB+
CHB-
CHC+
CHC-
Float
Shield
X8 / X9
Secondary Encoders
Quadrature