SAMSUNG SMPI-8 Pulse Count Input Module
SAMSUNG SMPI-8 Pulse Count Input Module
The SAMSUNG SMPI-8 is an 8-channel high-speed pulse counter input module designed for Samsung SPC and SM-series Programmable Logic Controllers (PLCs). Built to handle rapid digital pulse sequences, it connects directly with flow meters, rotary encoders, proximity switches, and frequency generators to perform real-time counting, frequency measurement, and positioning tasks without overloading the primary CPU.
Technical Parameter List
| Parameter | Specification |
| Model | SAMSUNG SMPI-8 |
| Input Channels | 8 Channels |
| Input Signal Type | High-Speed Pulse / Digital Input (PNP / NPN configurable) |
| Input Voltage Range | 24V DC (±10%) |
| Max Counting Frequency | Up to 10 kHz / 50 kHz (channel-dependent) |
| Counting Capacity | 32-bit counter (-2,147,483,648 to +2,147,483,647) |
| Isolation | Optocoupler isolation between field inputs and system backplane (1,500V AC) |
| Power Consumption | Internal backplane: 5V DC, ~150mA |
| Status Indicators | LED status per channel (CH1–CH8), RUN, ERROR |
Product Features / Core Advantages
Dedicated High-Speed Processing: Offloads high-frequency pulse processing from the main PLC CPU to eliminate signal loss during rapid operational cycles.
Flexible Counting Modes: Supports unidirectional counting, bidirectional pulse/direction processing, and quadrature phase inputs for encoder feedback.
Robust Noise Immunity: Built-in hardware hardware filtering and optocoupler isolation prevent false triggering caused by electromagnetic interference (EMI) in harsh industrial setups.
32-Bit Counter Range: Handles massive cumulative pulse counts without frequent register rollover, ideal for continuous fluid or energy metering.
Model Classification & Series Compatibility
SMPI-8: 8-Channel Standard High-Speed Pulse Input Module
SMPI-4: 4-Channel High-Speed Pulse Counter / Encoder Interface Module
SMDI-16 / SMDI-32: Standard Digital Input Modules (Low-frequency switching