Records time and date stamped, ON and oFF state changes for equipment run-time, usage and event duration data. Can be used with dry contact relay switches or analog voltage input signals to determine changes in status and open/closed contacts. Four channel, screw terminal inputs. Input Range: 0~12 VDC continuous; 0~30 VCD peak Input Low: <0.4V Input High: >2.7V Internal Weak Pull-Up: <500ìA Recommended Duty Cycle for Inputs Greater than 12VDC (over 1 minute interval): 18V:<50%,24V:<25%,30V:<10% Resolution: 1 second Channels: 4 Memory: 52,428 states Sample Rate: 1 second up to 12 hours LED Indicator: None Required Interface Package: IFC110 Baud Rate: 2,400 Typical Battery Life: 1 year Operating Environment: -20~+60°C, 0~95%RH non-condensing Material: Anodized aluminum Dimensions: 3.5" x 4.4" x 1.0" (89mm x 112mm x 26mm) CE Approval: No Weight: 13oz.