The 1794-VHSC module counts pulses from encoders (such as Allen-Bradley
Bulletin 845), pulse generators or mechanical limit switches, or proximity
switches, and returns either a count or frequency in binary format.
The module features include:
• Two counters configurable for three encoder modes, counter mode,
period/rate mode, continuous/rate mode, rate measurement, and pulsewidth modulation (PWM).
• Four outputs, isolated in pairs.
• Outputs are current-sourcing at 5 or 12…24V DC (0.5 mA max @ 5V; 1 A
max @ 12…24V).
• Single-ended or differential inputs.
• 2-phase encoder inputs up to a frequency of 250 kHz (X 4 mode).
• Single-phase counter inputs up to a frequency of 1 MHz.
• Input voltage range of 5V or 24V DC.
