VICI Selectors (multiposition) Microelectric - Manual (Page 3)

3
Cable and Connector Functions
Input power (20 – 30 VDC, with 24 – 28 VDC preferred) is supplied through a miniature power connec-
tor: the inner pin is + voltage and the outer is ground. Average DC current requirement is 2.5 amps.
Standby current is less than 100 milliamps. The actuator should not share a power supply with other
noise-sensitive electronics, as the high current draw can cause problems.
Motor driver output is through the 10 pin connector. The 26-pin connector is for the manual controller
and remote digital input/output signals; the actuator can be controlled by
either or both. The manual
controller has a pass-through port, so an additional cable can provide simultaneous control by an
external system. The three-pin connector is for RS-232 interface. The serial and digital functions are
fully described on pages 4 - 8.
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
module with the 26 pin ribbon cable. The manual controller has two functional modes – the operating
mode and the setup mode. The display indicates the current position in the operating mode, the total
number of positions in the setup mode, and an “EP” when there is a positioning error.
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 simultaneously. The DIRECTION LEDs will change, indicating that the direction has reversed.
Setup Mode
To shift into the setup mode, depress the STEP and HOME switches and hold them down for 8 seconds.
The position display LEDs will begin to flash, displaying 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 this
setting to the desired number of positions. To return to the operating mode, depress both switches
until the LEDs stop blinking.
1.94"
1.00"
.90"
1.04"
1.375"
(CLAMPRING)
4.44"
2.3"
1.2"
2.75"
.75" 1.00"
2.19"
Figure 2: Mounting dimensions
Mounting
The actuator should be oriented so
that any potential leakage of liquid
from the valve or fittings flows away
from rather than into the actuator.
(below) Figure 2 provides the mount-
ing dimensions for the stepper
motor/gearbox assembly.
OK
OK