8909U
DIN Rail Mounted
4 axis stepper motor drive module
Terminal Board
The Hytec 8909U is a simple and compact DIN-rail mounted stepper motor driver for use with 6 or 8-lead hybrid stepper motors. The unit has the following features:-
• Four channels of unipolar stepper motor drive at up to 1 amp per phase.
• Single external 12 or 24-volt power supply.
• Direct connection to the Newwood Solutions 8602/1 Stepper Motor Controller.
• Simple hook-up to the motor via screw terminals.
• Limit Switch and Encoder inputs for all four channels.
• Fully opto-isolated on the VME/8602/1 side.
• Full over-current detection on all outputs with fault reporting to the 8602/1
• Direct drive of 12 or 24-volt motors or use with external series resistors.
Each channel has three inputs coming from the 8602/1; these are step, direction and auxiliary. The auxiliary signal may be used to control the power to the motor if desired. Each channel also sends back four status signals to the 8602/1; these are positive and negative travel limit switch signals; a home limit signal and a fault signal. The fault signal is asserted if either of the output current sense signals for the channel indicate a fault. This fault detection results in the motor power being shut off for a pre-determined time (nominally 100 milliseconds) after which power is re-applied to gauge if the fault has been removed. In addition, the unit contains logic for accepting single-ended TTL signals from quadrature encoders giving phase A and phase B signals. 5-volt power for this type of encoder is provided at the screw terminal interface. Hytec offers companion DC power supplies in DIN-rail mounting format and 12 or 24-volt output versions with either 5 or 10 amp outputs. The 5 amp version would be used when 0.5 amp motors are being driven, while the 10 amp version would be needed if driving at 1 amp per phase. Hytec can also offer suitable series resistor assemblies, for example, two 50-watt 22 ohm resistors mounted on an aluminium plate for each motor, suitable for 24-volt 1 amp operation.
Size: DIN-rail module 7.5 ins x 3.0 ins.
Operating temp: 0 to 45 deg C ambient.
Number of channels: 4.
Step Sequence: Half-step – 400 steps per revolution.
Fault detection: Over-current detection at preset (user adjustable) level on all eight phase output driving cells.
Power: +24V @ phase current x 8 plus 0.2 amps maximum.
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