Comprehensive Product Summary – TRP-C26H Isolated 16-Channel Digital Input Modbus TCP Module

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### 1. Product Overview

Product Name: TRP-C26H
Model: TRP-C26H
Series: TRP-C Industrial Ethernet I/O Series
Article Number: TRP-C26H
Manufacturer: Trycom Technology Co., Ltd.
Manufacturer Address: No. 35, Zhongxing Rd., Guishan Township, Taoyuan County 333, Taiwan
Contact: Tel: +886-3-350-3351 | Fax: +886-3-350-3352
Website: [www.trycom.com.tw](http://www.trycom.com.tw)

The Trycom TRP-C26H is an isolated 16-channel digital input (DI) Modbus TCP module with integrated counter functionality. It is designed for industrial automation, remote monitoring, and control applications requiring reliable digital input acquisition over Ethernet networks. The module supports TRP-ASCII, Modbus RTU, and Modbus ASCII communication protocols, and can operate in pair mode with the TRP-C24H digital output module for direct remote I/O control without additional software.

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### 2. Key Features

- 16 optically isolated digital input channels with individual counters (0–65535).
- Wide input voltage range: accepts logic signals from ±0 to 30 V DC.
- High isolation protection: 3750 Vrms optical isolation between channels and logic circuitry.
- Multi-protocol support: automatically detects and operates with TRP-ASCII, Modbus RTU, or Modbus ASCII.
- Ethernet-based communication: Modbus TCP/IP interface via RJ45 connector.
- Supports up to 16 simultaneous TCP connections for multi-host environments.
- Built-in web server: allows configuration, monitoring, and firmware updates via standard web browsers.
- Virtual-COM mode: enables legacy serial applications to communicate over Ethernet.
- Pair mode operation: directly links with TRP-C24H for remote digital I/O mirroring without PC or software.
- Watchdog and voltage monitoring: ensures stable operation and automatic recovery after power or network failure.
- Heartbeat function: transmits periodic keep-alive packets every 5 seconds to maintain reliable connections.
- Auto-MDIX Ethernet port: supports automatic crossover detection for flexible cabling.
- Dual power input options: screw terminal or DC jack (10–30 V DC).
- DIN-rail and panel mounting support for industrial installation.
- LED indicators: Power, Link, and 16 channel status LEDs for real-time diagnostics.
- Factory reset button: restores default configuration parameters.
- Firmware upgradeable via Internet for long-term maintainability.

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### 3. Technical Specifications

| Parameter | Specification |
|----------------|-------------------|
| Power Input Voltage | DC +10 V to +30 V |
| Power Consumption | 240 mA @ 12 V DC |
| Input Channels | 16 optically isolated digital inputs |
| Input Counter Range | 0–65535 per channel |
| Input Voltage Range | ±0 to 30 V DC |
| Logic Level 0 | ≤ +1.0 V DC |
| Logic Level 1 | +4.0 V to +30 V DC |
| Optical Isolation | 3750 Vrms |
| Communication Interface | Ethernet RJ45 (Auto-MDIX) |
| Protocols Supported | TRP-ASCII, Modbus RTU, Modbus ASCII, Modbus TCP |
| Maximum TCP Connections | 1–16 simultaneous clients |
| Module ID Range | 1–255 |
| Heartbeat Interval | 5 seconds |
| Configuration Interfaces | Trycom Device Manager (DSM), Web browser |
| Mounting Options | DIN-rail or panel mount |
| Connection Type | Screw terminal (max AWG 12) or DC jack (5.5 × 2.1 mm) |
| Operating Temperature | 0 °C to +50 °C |
| Storage Temperature | –10 °C to +70 °C |
| Humidity | 10–90% RH, non-condensing |
| Dimensions | 151 mm (L) × 75 mm (W) × 26 mm (H) |
| Weight | 395 g |
| Indicators | Power, Link, 16 × DI LEDs |
| Enclosure | Industrial-grade metal housing |

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### 4. Functionality

The TRP-C26H functions as a network-based digital input acquisition module. Each of its 16 channels can independently detect digital logic states and count input pulses. The module communicates over Ethernet using Modbus TCP or Trycom’s proprietary TRP-ASCII protocol, enabling seamless integration into SCADA systems, PLC networks, or custom software applications.

Operation Modes:
- Modbus TCP Mode: Standard Modbus TCP/IP communication for industrial automation systems.
- Virtual-COM Mode: Emulates a serial COM port over Ethernet for compatibility with legacy serial applications.
- Pair Mode: When paired with a TRP-C24H digital output module, the TRP-C26H transmits input states directly to the output module, enabling remote I/O mirroring without a host PC.

Use Cases:
- Industrial process monitoring and control.
- Remote digital signal acquisition.
- Machine status monitoring.
- Counter-based event logging (e.g., pulse counting, switch activation).
- Integration with SCADA, Modscan32, Modbus Poll, CAS Modbus Scanner, and other Modbus-compatible software.

Compatibility:
- Works with Trycom’s TRP-C24H and TRP-C28H modules.
- Compatible with Windows-based configuration utilities and web browsers.
- Supports integration with programming environments such as Microsoft Visual Basic and Visual C++ via TRP-ASCII commands.

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### 5. Components & Accessories

Included Components:
- TRP-C26H main module.
- User manual (Rev. 1.3, printed September 2013).
- Software CD containing DSM utility, TRPCOM test utility, and Virtual-COM driver.
- Mounting hardware for DIN-rail and panel installation.

Connectors:
- Ethernet Port: RJ45 with Auto-MDIX support.
- Power Input: Screw terminal block or DC jack (5.5 × 2.1 mm).
- Digital Input Terminal Block: Screw terminals for 16 DI channels and common ground.

Optional Accessories:
- External DC power adapter (10–30 V DC).
- Ethernet cables (straight-through or crossover).
- DIN-rail mounting brackets.

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### 6. Installation & Setup

Installation Steps:
1. Power Connection:
Connect a DC power source (10–30 V) to the screw terminal or DC jack. The Power LED will blink to indicate readiness.
2. Network Connection:
Connect the RJ45 Ethernet port to a network switch, router, or PC. The Link LED will illuminate when a valid connection is established. Auto-MDIX allows use of either straight or crossover cables.
3. Digital Input Wiring:
Connect input devices (sensors, switches) to the DI terminals according to the wiring diagram. Each channel supports up to ±30 V DC input.
4. Configuration:
Configure network parameters using either:
- Trycom Device Manager (DSM) utility for Windows, or
- Built-in Web Server accessible via the module’s IP address (default 192.168.1.1).
Adjust IP, subnet mask, gateway, and Modbus parameters as required.
5. Verification:
Use the TRPCOM test utility or Modbus diagnostic tools (e.g., Modscan32) to verify communication and input status.

Factory Reset:
Hold the reset button while powering on until the Power LED flashes, then release to restore factory defaults.

Mounting:
Supports both DIN-rail and panel mounting for flexible installation in control cabinets or equipment enclosures.

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### 7. Performance & Capabilities

- Input Performance:
Each of the 16 channels can detect digital logic levels and count pulses up to 65535 counts.
- Isolation:
3750 Vrms optical isolation ensures protection against electrical surges and ground loops.
- Network Performance:
Supports up to 16 concurrent TCP client connections, enabling multiple monitoring systems to access the same module simultaneously.
- Reliability Features:
- Watchdog timer prevents system lock-up.
- Heartbeat function maintains active communication.
- Auto-reconnection after power or Ethernet failure.
- Firmware Management:
Firmware can be updated remotely via the web interface, ensuring long-term support and feature enhancements.
- Latency and Throughput:
Optimized for real-time digital input acquisition with minimal latency over Ethernet.
- Limitations:
- Operating temperature limited to 0–50 °C.
- Designed for DC input signals only.
- Not intended for high-frequency pulse counting beyond the specified counter range.

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### 8. Standards & Compliance

- Communication Standards:
- Modbus TCP/IP (IEEE 802.3 Ethernet standard)
- Modbus RTU / ASCII (per Modbus.org specifications)
- TRP-ASCII proprietary protocol for Trycom devices
- Electrical Safety:
- 3750 Vrms optical isolation between input and logic circuits.
- Dual power input protection.
- Environmental Compliance:
- Operating humidity 10–90% non-condensing.
- Industrial-grade design suitable for harsh environments.
- Regulatory Compliance:
- CE and FCC compliance (typical for Trycom industrial modules).
- RoHS-compliant manufacturing process.
- Industry Compatibility:
- Fully interoperable with Modbus-compatible SCADA and PLC systems.
- Supports standard Modbus function codes for reading discrete inputs and input registers.

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### 9. Additional Information

Warranty:
Standard manufacturer warranty (typically one year) covering defects in materials and workmanship. Warranty terms subject to Trycom’s policy at the time of purchase.

Technical Support:
Trycom provides technical documentation, firmware updates, and software utilities via its official website. Support is available through email and telephone.

Maintenance:
- Periodically verify firmware version and update if necessary.
- Inspect wiring connections and ensure terminals are secure.
- Avoid simultaneous use of both DC jack and screw terminal power inputs.
- Maintain clean, dry operating conditions within specified environmental limits.

Software Tools:
- Trycom Device Manager (DSM): for device discovery, configuration, and firmware updates.
- TRPCOM Utility: for testing and debugging TRP-ASCII commands.
- Virtual-COM Utility (VCOMM): for creating virtual serial ports over Ethernet.
- Modbus Diagnostic Tools: compatible with Modscan32, Modbus Poll, CAS Modbus Scanner.

Firmware Updates:
Firmware can be upgraded via the web interface or DSM utility. The process allows remote maintenance without physical access to the device.

Pair Mode Operation:
When configured in pair mode with a TRP-C24H digital output module, the TRP-C26H transmits input states directly to the output module over Ethernet. This configuration enables remote control applications without requiring a host computer or additional software. The module automatically reconnects after power or network interruptions, ensuring continuous operation.

LED Indicators:
- PWR LED: Blinking indicates module ready.
- LINK LED: Illuminated when Ethernet link is active.
- D0–DF LEDs: Indicate the status of each digital input channel.

Factory Default Parameters:
- IP Address: 192.168.1.1
- Subnet Mask: 255.255.255.0
- Gateway: 192.168.1.254
- Module ID: 1
- Protocol: TRP-ASCII / Modbus RTU / Modbus ASCII (auto-detect)

Physical Construction:
- Compact metal enclosure for industrial durability.
- Lightweight (395 g) and compact (151 × 75 × 26 mm) for easy integration into control panels.

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### Summary

The Trycom TRP-C26H is a robust, Ethernet-based 16-channel isolated digital input module designed for industrial automation and remote monitoring applications. With support for Modbus TCP, Modbus RTU/ASCII, and TRP-ASCII, it provides flexible integration options for both modern and legacy systems. Its optical isolation, wide input voltage range, and built-in counter functionality make it suitable for demanding environments where reliability and precision are critical.

The module’s web-based configuration, multi-client TCP support, and pairing capability with the TRP-C24H output module enable versatile deployment scenarios—from standalone remote I/O control to complex SCADA network integration. Combined with Trycom’s software utilities and firmware upgradability, the TRP-C26H offers a long-term, scalable solution for digital input acquisition in industrial Ethernet networks.