DB25 PIN Port Connection Description

1.	No Connection	14.	Enable All Windings
2.	No Connection	15.	No Connection
3.	No Connection	16.	No Connection
4.	No Connection	17.	No Connection
5.	No Connection	18.	No Connection
6.	No Connection	19.	A Direction Input
7.	No Connection	20.	Z Direction Input
8	No Conneciton	21.	Y Direction Input
9.	X Direction	22.	+5VDC Input Required to Power Driver OPTO
10.	A Step ( Clock Input)	23.	+5VDC Input Required to Power Driver OPTO
11.	Z Step ( Clock Input)	24.	No Connection
12.	Y Step ( Clock Input)	25.	No Connection

13.X Step ( Clock Input)

Optically Isolated Inputs

The following inputs to the MBC10641 are Optically Isolated.

Item	Pin #

Clock	1 & 2

Direction	3 & 4

On/Off	5 & 6

To enable an input, apply a DC voltage source of +5VDC to +24VDC across the inputs. The Anodes (+) are pins 1,3,and 5 and the Cathodes (-) are pins 2, 4, and 6.

Motor Selection

The MBC10641 is a Bipolar Microstep Driver that is compatible with both Bipolar and Unipolar Motor Configurations, (i.e. 8 and 4 lead motors, and 6 lead center tapped motors).

Step motors with low current ratings and high inductance will perform better at low speeds, providing higher low-end torque. Motors with high current ratings and low inductance will perform better at higher speeds, providing more high-end torque.

Since the MBC10641 is a constant current source, it is not necessary to use a motor that is rated at the same voltage as the supply voltage. What is important is that the MBC08161 is set to the appropriate current level based on the motor being used. Higher voltages will cause the current to flow faster through the motor coils. This in turn means higher step rates can be achieved. Care should be taken not to exceed the maximum voltage of the driver.

Anaheim Automation offers a comprehensive line of step motors in 17, 23, 34 and 42 frame sizes. Contact the factory to verify motor/ drive compatibility.

December 2004