초록 ▼

The invention is an override board releasably mounted in a programmable logic controller. The override board is used to control an individual output of the programmable logic controller. The override board includes a manual switch mounted to a printed circuit board assembly. The manual switch has an

The invention is an override board releasably mounted in a programmable logic controller. The override board is used to control an individual output of the programmable logic controller. The override board includes a manual switch mounted to a printed circuit board assembly. The manual switch has an "auto" position, an "on" position and an "off" position. An output device is also mounted to the printed circuit board assembly and is electrically connected to the manual switch. Placing the manual switch in the "auto" position transfers control of the override board to the programmable logic controller. Placing the manual switch in the "on" position energizes the output device. Placing the manual switch in the "off" position de-energizes the output device.

대표청구항 ▼

1. An override board used to control an output of a programmable logic controller, the override board comprising:a printed circuit board assembly; a connection means secured to the printed circuit board assembly and configured so as to allow the override board to be releasably secured from a mating

1. An override board used to control an output of a programmable logic controller, the override board comprising:a printed circuit board assembly; a connection means secured to the printed circuit board assembly and configured so as to allow the override board to be releasably secured from a mating connection means disposed on the programmable logic controller; a manual switch assembly, the manual switch having a first position, a second position and a third position; and output device mounted to the printed circuit board assembly, wherein the output device is electrically connected to the manual switch and wherein placing the manual switch in the first position transfers control of the override board to the programmable logic controller, placing the manual switch in the second position energizes the output device, and placing the manual switch in the third position de-energizes the output device.