Instruction Manual

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Bit 1 Bit 2 Step mode Clock Pulse frequency factor
OFF OFF ¼ 4X
OFF ON ½ 2X
ON OFF ½ 2X
ON ON Full 1X
G) CN3: MDL-003 (or other stepper motor) drive connector
Table 4 CN3 connector pinout
Pin # Name I/O Function
1 B− O Motor coil phase B −
2 B+ O Motor coil phase B +
3 A− O Motor coil phase A −
4 A+ O Motor coil phase A +
5 Home1 I Home position sensor terminal 1
6 Home2 I Home position sensor terminal 2
7 Far end 1 I Far end position sensor terminal 1
8 Far end 2 I Far end position sensor terminal 2
9 NC – Not connected
10 NC – Not connected
If the board is being used to control an MDL-003, the MDL-003 optical head’s electrical
cable plugs into this connector.
If the board is being used to control a different stepper motor, pins 1-4 are the two-phase
drive signals for the motor.
Document # GP-IN-MDL-003-CONTROLB-12 Page 8 of 13