Omni 4000 Series - Page 173

OMNI 4000/7000 Installation Guide – Rev H
Page 8-5
Technical Specifications
Densitometer Pulse Inputs*
Specifications
Positive Going Trigger
Threshold
• +1.6 V ± 0.2 V–AC coupling: low threshold
• +4.2 V ± 0.2 V–DC coupling: high threshold
Negative Going Trigger
Threshold
• +1.2 V ± 0.2 V–AC coupling: low threshold
• +3.2 V ± 0.2 V–DC coupling: high threshold
Minimum Signal Level
2 V peak to peak
Maximum Signal Level
5 V peak to peak
Minimum Frequency
100 Hz (10,000μs period)
Maximum Frequency
6.7 kHz (150μs period)
*Use AC coupling–low threshold or DC coupling–high threshold settings.
AC coupling is only used in conjunction with the low signal input threshold setting. It
is available for densitometer periodic time measurements only.
Prover Detector Switch Inputs:
Conventional and Pipe
Specifications
Input Type
Digital I/O
Gating Transition
Voltage transition starts and stops prove run counts
Minimum Time Pulse High
1 ms
Minimum Time Pulse Low
> 100 ms
Input Impedance
4.7 kΩ
Input Voltage
> +5 VDC ON, < +4 VDC OFF (referenced to DC return)
Debounce
100 ms in hardware logic
Common Mode Voltage
±250 VDC to chassis ground
E Combo Module Prover
Detector Switch Inputs:
Pulse Interpolation
Specifications
Input Type
• Digital I/O (active-low)
• Normally driven by a bounce-free open collector
transistor or a normally open switch
Gating Transition
Voltage transition starts and stops prove run counts
Input Voltage
> +7 VDC ON, < +6 VDC OFF (referenced to DC return)