Series 90 are typically controlled by a 135 ohm slidewire output from either a slave actuator or controller. The connections from the series 90 controller are R to R, B to B and W to W. Jumper R to B to open and Jumper R to W to close. If you jumper R, W, B together the actuator will go to mid stroke.
Did I miss the wiring for the series 90?
Series 90 are typically controlled by a 135 ohm slidewire output from either a slave actuator or controller. The connections from the series 90 controller are R to R, B to B and W to W. Jumper R to B to open and Jumper R to W to close. If you jumper R, W, B together the actuator will go to mid stroke.