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Motor driver output is through a 10 pin connector. The 26-pin connector is for the manual controller
or digital input/output signals. (The actuator can be controlled by either or both. The manual controller
has a through port, so an additional cable can provide simultaneous control by an external system.)
The three-pin connector is for a serial RS-232 interface. The digital and serial functions are fully
described on the insert page.
Manual Controller
The manual controller allows the user to select the rotation direction, set the total number of positions,
and control the STEP and HOME functions. The controller is connected to the actuator control mod-
ule with the 26 pin ribbon cable. The manual controller has two functional modes – the operating
mode and the setup mode.
(NOTE: An LED display of "EP" indicates a positioning error due to valve binding.)
Operating Mode
This is the default mode; that is, the controller will be in this mode when it is initially powered. In this
mode the STEP and HOME functions are clearly labelled as the primary functions of the left and right
switches, respectively. To change the direction of rotation, momentarily depress the STEP and HOME
switches at the same time. The DIRECTION LED's will change, indicating that the direction has
reversed.
Setup Mode
To shift into the setup mode, depress the STEP and HOME switches for 8 seconds. The position
display LED's will begin to flash, showing the current setting for the total number of positions in a full
rotation. Use the STEP switch to increase or the HOME switch to decrease the setting to the desired
value. To return to the operating mode, depress both switches until the LED's stop blinking.
Simultaneous Use of the Manual Controller and an External Control System
The manual controller has two identical connectors for input and/or output, permitting an external
system to be used simultaneously with the manual STEP and HOME commands. However, the
following precaution should be observed :
If the STEP , HOME, and DIRECTION functions are to be used by both systems, the external system
control output should be either contact closure or open collector outputs rather than TTL signals .
While TTL signals will cause no damage to either system, they will effectively override the manual
controller.
Connecting External Systems
An external control system can be connected to the actuator in several ways:
1. The Digital Input/Output connector is a 26 pin dual in-line connector which can mate to a mass
terminatable flat cable connector availble from a number of manufacturers. The flat cable can then
be integrated into the control system.
2. The manual controller can be connected to the actuator, and then a 26 pin dual in-line connector
and flat cable assembly can be attached to the controller. This allows dual control as well as a
visual indication of the actuator position.
3. A breakout board can be attached to the Digital Input/Output port, either alone or in conjunction with
the manual controller. This provides screw terminal connections to the individual input/output
signals of the actuator control unit.
4. A serial port can be connected from a host control system to the actuator, using the optional RS232
cable (Product No. I-22697).
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