24Bit Up/Down Counter Board for ISA

This board is the 24-bit up-and-down counter of four channels which counts the digital signal from external equipment. It is possible to have a coincidence detection function and a phase discrimination function with setting data, and to carry out the direct file of the signals, such as a rotary encoder and a linear gauge. Furthermore, a programmable timer is carried, interruption of a fixed cycle is generated using this, and the data of each channel can be read. Moreover, it can generate by interrupting also by the coincidence signal with setting data.

	This one board can perform the 24-bit up-and-down count for four channels.
	Two phase signal, such as a rotary encoder and a linear gauge, are countable.
	An input can choose either a Opto-isolated input or a TTL level input for every channel.
	By coincidence with the count value of each channel, and the value set up arbitrarily, a signal can be outputted for interruption to generating or the exterior.
	Since the programmable timer is carried, interruption of a fixed cycle can be generated in the set-up timer value.
	It has equipped the general-purpose input signal each one channel at a time. (a photo-coupler and TTL) .