Overview
Manuals
Pulse Signal Limits
Filter and Cabling
Rate and Totalization
Features:
- Eight pulse-input channels accept rectangular or sine-wave signals, with contact sensing through the matched FTA.
- Field scanning and totalizer AV updates occur every 20 ms; PV updates occur every 500 ms for eight channels.
- The 1 Hz–20 kHz range is conditional on waveform, filter jumper and cabling; MC denotes the documented conformally coated execution.
The MC-PPIX02 is the conformally coated eight-channel pulse input processor in Honeywell's Process Manager I/O family. Its companion field termination assembly interfaces pulse-voltage or contact signals from compatible field instruments. The manufacturer's model table explicitly associates the MC execution with the MU-PPIX02 electrical specification, and the HPM planning guide identifies assembly 51304386-150. The processor supplies rate and totalizer information to the control system; it is not a 4–20 mA analog-input card or a complete standalone flow computer.
Each input must meet the documented pulse thresholds and minimum high and low dwell times. The maximum 20 kHz rating assumes the appropriate filter setting and signal conditions, while mixed amplitudes and longer FTA cables reduce the permitted rate. Sine-wave inputs must not be mixed with square waves or contacts on the same FTA. During replacement, retain the established sensor wiring, scaling, filter-jumper position and totalization settings, then verify counts and rate indications against a known input before returning the process measurement to service.
The MC-PPIX02 Honeywell 8-Channel Pulse Input Processor may still be available for purchase and support from Moore Automated Company beyond End-Of-Life (EOL) by the manufacturer (OEM).
Honeywell MC-PPIX02 official technical documentation and product links.
This multi-page Honeywell technical document contains the exact model and its technical data. Apply the values to the supplied type number and verify its revision before installation.
The low pulse level is −0.5 to +1.9 V and the high level is +3.5 to +24 V; hysteresis prevents a change between 1.9 and 3.5 V. Input impedance is at least 10 kΩ. The ±30 V figure is a no-damage limit, not an approved normal pulse amplitude. Verify the sensor waveform and reference connection before commissioning.
Both high and low dwell must be at least 25 µs at 20 kHz with the filter jumper stored, 50 µs at 10 kHz in H, or 500 µs at 1 kHz in L. Mixed-amplitude inputs with a 50 m FTA cable are limited to 9 kHz and 55 µs dwell. Use the manufacturer's full cable table for other lengths.
The field input scan and AV update used for totalization are 20 ms, whereas the PV update is 500 ms for eight channels. Rate accuracy is ±0.01% of input frequency or ±0.4 Hz, whichever is larger, with ±0.4 Hz rate resolution. Confirm the configured engineering scaling and totalizer behavior; a faster field scan does not make every displayed value update at that rate.
