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We are using 8x8 DDC controllers. Both inputs and outputs can be programmed to be either digital or analog. The inputs are 0-5 VDC. Outputs are 0-10 VDC.
Most of our applications require more inputs than outputs. As a result we have to add controllers and wind up with unused outputs. The bulk are low speed digital inputs, on/off state of motors, switches and other devices.
We're looking for a reliable way to "stuff" a number of on/off states into one controller input. Time multiplexing could be a solution. The controllers run at least at 20 scan/sec and we could stand a one or two second delay in receiving a change of state. We could even spare an output (0-10 VDC analog or digital) for synchronization if necessary.
We prefer something tested and "off-the-shelf" but price is an important factor.
Thanks for your help.
Zvi Marcus
Most of our applications require more inputs than outputs. As a result we have to add controllers and wind up with unused outputs. The bulk are low speed digital inputs, on/off state of motors, switches and other devices.
We're looking for a reliable way to "stuff" a number of on/off states into one controller input. Time multiplexing could be a solution. The controllers run at least at 20 scan/sec and we could stand a one or two second delay in receiving a change of state. We could even spare an output (0-10 VDC analog or digital) for synchronization if necessary.
We prefer something tested and "off-the-shelf" but price is an important factor.
Thanks for your help.
Zvi Marcus