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> New keithley pdiso-8 8-chann input/output interface new
New keithley pdiso-8 8-chann input/output interface new
The PDISO-8 is a low-cost 8-channel isolated input/output interface board designed for control and sensing applications. The PDISO-8 provides eight electromechanical relay outputs and eight optically isolated inputs, so you can both load (send) and sense signals. The PDISO-8 can be used in various applications including load switching, external-switch sensing, contact closure, and external-voltage sensing. This interface board is easily installed in any ISA-bus compatible computer.
The eight electromechanical relay outputs (contact closures) are addressed as a single I/O byte. Five of the relays are Form C contacts (SPDT) and three are Form A (SPST normally open). The relay contacts are rated at 3A at 125V rms with a resistive load. The state of the relays (On/Off) can be determined by reading back the data from the I/O port.
The eight individual optically isolated inputs can be read as a single I/O port byte. The inputs are not polarity sensitive and can be driven from DC or AC (50 1,000Hz) control voltages from 5 to 24V rms. Each input includes a switchable slow/fast filter with a time constant of 5ms. The filter must be selected for AC input voltages but can be switched out to obtain response times of less than 50 s for DC inputs. Additional resistance can be added to the PDISO-8 inputs externally to extend the input voltage range. The inputs can be mixed between AC and DC. The inputs can be driven from standard 12/24VAC control transformers.
