7
the low true (active) will be indicated with a bar. For example, in the
case of CW/CCW, CW is active with no connection.
•
All logic control pins are optically isolated internally. When a pin
is left
open
, it is clamped in a
logic high
(inactivated) state.
•
The motor drive changes state and advances the motor one step
(or on-half step in the half-step mode) on a positive going (low to
high) pulse edge.
•
Clockwise (CW) and counterclockwise (CCW) are oriented cor-
rectly when viewing the motor from the label end.
SECTION 2: MOUNTING AND PIN ASSIGNMENTS
2.1 MOUNTING
The 230-TOH and 430-TOH modules are mounted by affixing the
heat sink to a flat surface. Figure 2.1 shows the mounting hole loca-
tions and diameters. It is recommended that 6-32 or 8-32 screws be
used for mounting.
The major mounting consideration is that the aluminum case
temperature be maintained below 167°F (75°C).
The heat sink should always be mounted with the fins ori-
ented vertically, or proper cooling will not occur.
If the heat sink is separated from the motor drive module for
mounting on opposite sides of a bulkhead, silicone heat sink com-
pound (such as Dow-Corning 340) should always be used during
reassembly. A very thin coating is sufficient; too much is worse than
none at all. Aluminum is the preferred bulkhead material if this
reconfiguration is done.
2.2 MOTOR CONNECTIONS
All motor connections are made via 7 pins on the oscillator board.
The terminal strip supplied by Superior Electric (Part # B215744-
007) is the recommended mounting method. Figure 2.2 shows the
location and function of the motor drive pins.
Figure 2.2
Motor and I/O Signal Pin Connections
It is suggested that a Superior Electric motor cable be used. They
are available as follows:
WITH MATING TERMINAL
FOR SUPERIOR ELECTRIC
NO TERMINALS
CONNECTOR MOTORS
LENGTH
PART NUMBER
PART NUMBER
10 ft (3m)
B216022-001
B216067-001
20 ft (7.6m)
B216022-002
B216067-002
50 ft (15.2m)
B216022-003
B216067-003
PLEASE NOTE:
The motor drive pins are arranged symmetri-
cally about the center Vm pin. When connecting the motor, if
the motor connector is inadvertently rotated 180 degrees, then
the CW and CCW directions will be reversed. See Figure 2.2
Figure 2.1: Mounting Diagram
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