Comprehensive Product Summary – CONTEC CNT16‑8(FIT)GY / CNT16‑8L(FIT)GY Ethernet 8‑Channel 16‑bit Counter Module

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### 1. Product Overview

Product Name: Ethernet 8 Counter 16‑bit Up Module
Model Numbers: CNT16‑8(FIT)GY (12–24 VDC type), CNT16‑8L(FIT)GY (5 VDC type)
Series: F&eIT Series
Article Number: CNT16‑8(FIT)
Manufacturer: CONTEC CO., LTD., Osaka, Japan

The CONTEC CNT16‑8(FIT)GY and CNT16‑8L(FIT)GY are Ethernet‑based, DIN‑rail‑mountable, isolated up‑counter modules designed for industrial and embedded control systems. Each module provides eight optically isolated input channels capable of 16‑bit up‑counting of external pulse signals. These modules integrate seamlessly with CONTEC’s F&eIT Series controllers such as CPU‑CAxx(FIT)GY and CPU‑SBxx(FIT)GY, enabling distributed I/O and network‑based data acquisition.

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### 2. Key Features

- Eight Independent 16‑bit Counters: Each channel performs up‑counting of external pulse signals up to 16‑bit resolution (0x0000–0xFFFF).
- Optical Isolation: All input channels are opto‑isolated, providing high noise immunity and protection against ground loops.
- Wide Power Range:
- CNT16‑8(FIT)GY operates on 12–24 VDC (±15%) external supply.
- CNT16‑8L(FIT)GY operates on 5 VDC (±10%) external supply.
- Digital Input Filtering: Built‑in digital filter configurable from 0.25 µs to 131.072 ms to suppress contact bounce and noise.
- DIN‑Rail Mounting: Standard 35 mm DIN‑rail one‑touch mounting mechanism for easy installation.
- Stackable Modular Design: Modules interconnect laterally via stack connectors—no backplane required.
- Device ID Rotary Switch: Hardware rotary switch (0–7) for unique module identification within a system.
- Web and API Control: Supports control via I/O address map, memory address map, Windows drivers, and web browser interfaces.
- Interrupt Support: Combined interrupt output for all eight channels; interrupt generated on counter carry‑up.
- High Reliability: Industrial‑grade design with opto‑couplers, robust connectors, and compliance with FCC Class A standards.

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### 3. Technical Specifications

| Parameter | CNT16‑8(FIT)GY | CNT16‑8L(FIT)GY |
|----------------|--------------------|----------------------|
| Input Channels | 8 (common) | 8 (common) |
| Counting System | Up‑counting (binary) | Up‑counting (binary) |
| Maximum Count | 0xFFFF (16‑bit) | 0xFFFF (16‑bit) |
| Response Frequency | 5 kHz (max, 50% duty) | 10 kHz (max, 50% duty) |
| Input Type | Opto‑isolated, compatible with current sink/source | Same |
| Input Resistance | 3 kΩ | 1.2 kΩ |
| Input ON/OFF Current | ≥ 3.4 mA / ≤ 0.16 mA | ≥ 3.8 mA / ≤ 0.16 mA |
| External Circuit Power | 12–24 VDC (±15%) | 5 VDC (±10%) |
| Current per Channel | 4 mA @ 12 V, 8 mA @ 24 V | 4 mA @ 5 V |
| Digital Filter Range | 0.25 µs – 131.072 ms | Same |
| Interrupt Levels | IRQ 5, 7, 9 (via CPU‑SBxx) | Same |
| Internal Power Consumption | 5 VDC (±5%) 150 mA max | 5 VDC (±5%) 150 mA max |
| Signal Extension Distance | Approx. 50 m (depends on wiring) | Same |
| Dimensions (W×D×H) | 25.2 × 64.7 × 94.0 mm (excluding protrusions) | Same |
| Weight | Approx. 100 g | Approx. 100 g |
| Mounting | 35 mm DIN‑rail, one‑touch | Same |
| Connection Method | Stack connector (side) | Same |
| Applicable Wire | AWG 28–16 | AWG 28–16 |
| Connector Plug | FRONT‑MC1,5/12‑ST‑3.81 (Phoenix Contact) | Same |
| Operating Temperature | 0 – 50 °C | 0 – 50 °C |
| Storage Temperature | −10 – 60 °C | −10 – 60 °C |
| Operating Humidity | 10 – 90 % RH (non‑condensing) | Same |
| Corrosive Gas / Dust | None / Not excessive | Same |

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### 4. Functionality

Operating Principle:
Each channel counts rising edges of external pulse signals. The input circuitry uses opto‑couplers to isolate field wiring from internal logic. The counter increments until overflow (FFFFh → 0000h), at which point a carry‑up interrupt can be generated.

Use Cases:
- Machine cycle counting and production monitoring
- Encoder pulse counting for motion systems
- Flowmeter pulse accumulation
- Event counting in process control
- Integration with PLCs or PC‑based controllers via Ethernet

Compatibility:
- Controllers: CPU‑CAxx(FIT)GY, CPU‑SBxx(FIT)GY, SVR‑MMF2(FIT), SVR‑MMF(FIT)GY
- Control Interfaces:
- I/O address map (direct I/O control)
- Memory address map (network control)
- Windows API drivers (API‑CAP(W32), API‑SBP(W32))
- FIT protocol and web‑based configuration

Device ID:
Rotary switch (0–7) assigns unique ID for up to eight modules per controller.

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### 5. Components & Accessories

Package Contents:
1. One module (CNT16‑8(FIT)GY or CNT16‑8L(FIT)GY)
2. Interface connector plug (Phoenix Contact FRONT‑MC1,5/12‑ST‑3.81)
3. CD‑ROM (F&eIT Series Setup Disk) containing drivers, manuals, and utilities
4. First Step Guide (printed quick‑start manual)

Optional Accessories:
- Additional Phoenix Contact connectors (MC1,5/12‑GF‑3.81)
- DIN‑rail mounting hardware (standard 35 mm rail)
- Controller modules and Ethernet interface units from the F&eIT Series

Connectors:
- 12‑pin, 3.81 mm pitch, 8 A rated current
- Screw‑type terminal with stopper flange
- Wire strip length: 9–10 mm

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### 6. Installation & Setup

Mounting:
Attach directly to a 35 mm DIN rail using the built‑in clip. Modules can be stacked laterally via side connectors for compact system assembly.

Wiring:
Use AWG 28–16 wires. Strip 9–10 mm insulation, insert into terminal openings, and tighten screws. Avoid pulling on cables when removing connectors.

Interface Connector Pinout:

| Pin | Signal | Description |
|------|---------|-------------|
| 1 | COM 0 (+/–) | Common for CH0–CH3 |
| 2 | NC | Not connected |
| 3–6 | IN0–IN3 | Pulse inputs CH0–CH3 |
| 7 | COM 1 (+/–) | Common for CH4–CH7 |
| 8 | NC | Not connected |
| 9–12 | IN4–IN7 | Pulse inputs CH4–CH7 |

Device ID Setting:
Use the front rotary switch to assign IDs 0–7 (factory default = 0).

Environmental Requirements:
Operate within 0–50 °C, 10–90 % RH (non‑condensing). Avoid direct sunlight, vibration, magnetic fields, or corrosive gases.

Power Requirements:
- CNT16‑8(FIT)GY: 12–24 VDC external input circuit power
- CNT16‑8L(FIT)GY: 5 VDC external input circuit power
- Internal logic: 5 VDC ± 5%, 150 mA max

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### 7. Performance & Capabilities

Counting Performance:
- 16‑bit up‑counting per channel
- Maximum input frequency: 5 kHz (CNT16‑8), 10 kHz (CNT16‑8L)
- Minimum pulse width: 100 µs (approx.)
- Carry‑up interrupt on overflow (FFFFh → 0000h)

Digital Filter:
- Configurable via command or memory map
- 21 selectable settings (0.25 µs – 131.072 ms)
- Factory default: “Not used”
- Applies globally to all channels

Interrupt Handling:
- Combined interrupt output for all channels
- Selectable IRQ 5, 7, 9 (via controller)
- Masking and status registers for software control

Data Access:
- I/O Address Map: Direct register access (e.g., 0800h–081Fh for ID 0)
- Memory Address Map: Network‑based access via controller memory (addresses 300000h–30407Fh)
- Basic I/O Data Area: 16‑bit counter values per channel (little‑endian format)

Performance Limitations:
- Counting only in up direction (no down‑counting)
- Shared interrupt line for all channels
- Digital filter applies globally, not per channel

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### 8. Standards & Compliance

- Electrical Isolation: Opto‑coupler isolation between input and logic circuits
- EMC Compliance: FCC Part 15 Class A (industrial environment)
- Safety: Designed for low‑voltage DC operation; conforms to industrial control equipment standards
- Environmental: RoHS‑compliant materials; designed for 0–50 °C operation
- Quality Assurance: Manufactured under CONTEC’s ISO‑certified quality system

FCC Notice:
This device complies with Class A digital device limits under Part 15 of the FCC Rules. Operation in residential environments may cause interference.

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### 9. Additional Information

Warranty:
Limited one‑year warranty against defects in materials and workmanship from the date of purchase. Warranty excludes physical damage, misuse, or unauthorized modification.

Service & RMA:
Return merchandise authorization (RMA) required before returning products. Ship prepaid with proof of purchase to the CONTEC distributor or regional office.

Liability:
CONTEC’s liability is limited to repair or replacement. The company is not responsible for consequential damages arising from misuse or malfunction.

Maintenance:
- Periodically inspect ventilation slits for dust or obstruction.
- Store in original packaging at room temperature, away from moisture and static electricity.
- Dispose of according to local electronic waste regulations.

Support & Resources:
- Websites:
- Japanese: [http://www.contec.co.jp/](http://www.contec.co.jp/)
- English: [http://www.contec.com/](http://www.contec.com/)
- Chinese: [http://www.contec.com.cn/](http://www.contec.com.cn/)
- Downloads: Manuals, drivers, and sample programs available online.
- Software Tools: F&eIT Series Setup Disk includes drivers, API libraries, and configuration utilities.

Documentation:
- User’s Manual (this document)
- Controller module manuals (CPU‑CAxx, CPU‑SBxx)
- Reference guides for API‑CAP(W32) and API‑SBP(W32)

Revision & Publication:
- Copyright © 2004–2006 CONTEC CO., LTD.
- Document No. LYDQ282, Rev. 3 (November 2006 Edition)

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### Summary

The CONTEC CNT16‑8(FIT)GY and CNT16‑8L(FIT)GY modules are compact, Ethernet‑enabled, 8‑channel, 16‑bit up‑counters engineered for industrial automation and data acquisition. Their opto‑isolated design ensures robust signal integrity in electrically noisy environments, while the flexible digital filtering and interrupt capabilities support precise pulse measurement. Integration with CONTEC’s F&eIT controllers allows both local and network‑based control through I/O or memory mapping, Windows APIs, or web interfaces. With DIN‑rail mounting, stackable architecture, and comprehensive software support, these modules provide a scalable solution for distributed counting and monitoring applications in manufacturing, process control, and embedded systems.