The Tektronix VX4356 Relay Switching Module is a printed circuit board assembly for use in a mainframe conforming to the VXIbus specification. The module provides 20 independently controlled double-pole, double-throw relays. Individual relays or all relays can be opened or closed under program control.
The amount of delay between successive operations and the relay closure dwell time can be controlled by software. Delay times from 0 to 65535 milliseconds can be selected. The module is programmed by transmitting ASCII characters from the system controller through the VXI system module.
The module s commands also provide access to system information. The position of any individual relay (open or closed) may be read back by the system controller and is also displayed by LEDs on the module s front panel. Other commands return the programmed time delay and identification information about the module.
