Owner's manual

Counter / Flow Meter Input Module
77
Electrical Fast Transient IEC 801-4
Radiated Emissions CISPR 11 Class A
Surge Impulse IEC 801-5
Conducted Immunity IEC 801-6
Fast Surge Immunity EN61000-4-5
Voltage Dropouts (Variation and Dips) EN61000-4-11
Electrical Specifications
Specification Value
Configuration 8 channels of differential counter inputs 4 channels of quadrature encoding 8 input
enable control lines
Input Modes DC counter, AC flow meter
Voltage Range: AC 0-75V 5VDC 12VDC 24VDC
VIL
1
-50 mV 1V 3V 6
VIH +50 mVpk 3.5V 9V 10.5
Vmax CE ±75Vrms ±75V ±75V ±75V
Current Range 6 mA max. at 75VDC
Input Impedance 15 kohm
Counter Speed:
DC Inputs 5V, 12V, 24V, AC 0 to 50 kHz
Input Frequency:
DC Inputs 0 to 50 kHz (count mode)
AC Inputs 0 to 50 kHz (count mode)
Counter Enable Input:
VIL 1.0V min.
VIH 3.5V max.
Vmax 45V
Input Impedance 14 kohm
Meter Proving Input:
VIL 1V min.
VIH 3.5V max.
Vmax 45V
Input Impedance 14 kohm
Minimum Pulse Time:
External Enable/Disable Enable and disable setup time = 10 us
Channel Update Time:
No Scaling <1 ms per channel, worst case
Scaling <1.5 ms per channel
Accuracy:
Frequency Mode ±0.8 percent at 50 kHz, +/- 1 Hz Avg. Mode / .01 percent Resolution
Maximum Count Value Low range 65 K High range 16 M
Fault Detection Over-range and under-range status bits, for all current and voltage modes
Data Format:
Counter mode Maximum binary value 16,777,216
Frequency mode Maximum binary value 65,536
Isolation:
Channel to Rack 1000VDC continuous, optical and magnetic
Channel to Channel 0 VDC