In an effort to be more consistent in the field wiring of their devices, positive switching is now used on all ProMation Engineering quarter-turn, low voltage, on/off DC actuators. All the 12V and 24V, AC and DC products are now switched on the hot leg.
Additionally, a single 24V model can now be used for either AC or DC power supplies (on/off models only).
The change will take effect immediately. The company will continue to support their negative switching products that have been deployed in the field.
24VDC products will now be wired in the field so that the positive leg of the line power will drive the direction of the actuator through the switch card terminals. Proportional control products are not affected.
This is the opposite of the wiring of previous 12/24 VDC products.
Courtesy of ProMation Engineering.