You should consider 8710 for USB Contact Data Acquisition modules. Because they let you use read switch contact closures with a PC USB port.
USB Contact Data Acquisition
The 8710 Series provides improved cost/performance compared to similarly priced digital input devices. Each device provides 15 isolated digital inputs.
USB Contact Inputs
8710 Series modules provide fifteen Isolated USB digital inputs. The inputs can be used for monitoring switched, contacts, and other digital output on/off devices.
Compatible with a number of software options.
8710 series USB contact sensor modules allow the simple measurement of industry standard contact sensor signals. So, you can easily connect your existing sensors to a modern sensor monitoring system. Furthermore, they are useful in HVAC systems, refrigeration systems, chillers, environmental monitoring, computer room monitoring, dryer, and a variety of other applications.
Simple to use USB sensor measurement
When you need simple to use sensor measurement, use the 8710 series. In other words, 8710 series isolated input modules are a simple way to add sensor measurement to an environmental monitoring system. Flow switches, float switches, level switches, pressure switches, temperature switches, and more!
Useful because it provides simple screw clamp wired inputs. It is easily used for sensor monitoring using industry standard sensor signals. Firstly, the 8000 has simple to use Windows compatible software available. Secondly it uses industry standard voltage sensor signals. Therefore, sensor measurement or sensor profile recording is simple, data can be updated real time directly into Excel, on custom screens, recorded to file, and more! Total number of channels can be extended with additional units, as well as allowing an increased number of sensors.
So, you can, monitor 15 sensors per unit. Also, multiple units per system, expandable as needed.
• Easy to use digital inputs, with 0-30Vdc range and internal 10K pull-up resistors.
• USB communications interface.
• Modbus RTU Protocol.
• 500Vrms digital input isolation.
• Requires +24V unregulated supply, 1.4W.
• Removable screw terminal plug connectors.
• 3ft USB cable included.
[PC and Software, are not included]