Comprehensive Product Summary – Trycom TRP‑C51B Bluetooth to RS‑232/422/485 Converter

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### 1. Product Overview

Product Name: TRP‑C51B
Model: TRP‑C51B
Series: TRP‑C51 Series (Version B)
Article Number: TRP‑C51B
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‑C51B is a professional‑grade Bluetooth to RS‑232/422/485 converter designed to provide a transparent wireless serial communication link between industrial devices and host systems. It eliminates the need for physical serial cabling by using Bluetooth Class 1 wireless technology, enabling reliable data transmission over distances up to 100 meters in open field conditions, or up to 1 kilometer when paired with an optional directional outdoor antenna.

The TRP‑C51B supports RS‑232, RS‑422, and RS‑485 interfaces with automatic signal switching, wide‑range DC power input, and robust surge and ESD protection. It is engineered for industrial automation, monitoring, and control applications requiring wireless serial connectivity.

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### 2. Key Features

- Bluetooth V1.2 Class 1 Compliance:
Operates at 2.5 mW (4 dBm) output power, ensuring stable long‑range communication.

- Wireless Range:
- Standard open‑field range: 100 m
- Extended range with optional directional antenna: up to 1 km

- Multi‑Interface Support:
- RS‑232 (TXD, RXD, GND, RTS, CTS)
- RS‑422 (TX+, TX‑, RX+, RX‑) full‑duplex
- RS‑485 (Data+, Data‑) half‑duplex

- Automatic Interface Switching:
The converter automatically detects and switches between RS‑232, RS‑422, and RS‑485 modes without manual reconfiguration.

- Flexible Communication Modes:
- Direct Link Mode: Connects directly to a Bluetooth‑enabled PC or PDA.
- Paired Mode: Two TRP‑C51B units automatically form a transparent wireless serial bridge.

- Wide Baud Rate Support:
Configurable from 1.2 Kbps to 921.6 Kbps (depending on firmware version).

- Comprehensive Configuration Utility:
Bundled TRP‑BT Windows software allows configuration of baud rate, parity, stop bits, flow control, and Bluetooth parameters.

- Industrial‑Grade Protection:
- ±15 kV ESD protection on RS‑232/422/485 lines
- Surge protection on RS‑422/485 lines

- Power Flexibility:
Accepts +10 V DC to +30 V DC input via screw terminal or external DC adapter (5.5 × 2.1 × 12 mm plug, 500 mA).

- Mounting Options:
Supports DIN‑rail and panel mounting for industrial enclosures.

- Status Indicators:
Four LEDs for Power, Link, TX, and RX provide real‑time operational feedback.

- Compact and Durable Design:
Rugged metal enclosure, compact footprint (151 × 75 × 26 mm), and lightweight (≈ 400 g).

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### 3. Technical Specifications

| Parameter | Specification |
|----------------|------------------|
| Bluetooth Standard | Bluetooth V1.2, Class 1 (2.5 mW / 4 dBm) |
| Communication Range | 100 m (open field); up to 1 km with optional directional antenna |
| Interfaces | RS‑232, RS‑422, RS‑485 (auto‑switching) |
| RS‑232 Signals | TXD, RXD, GND, RTS, CTS |
| RS‑422 Signals | TX+, TX‑, RX+, RX‑ (4‑wire full‑duplex) |
| RS‑485 Signals | Data+, Data‑ (2‑wire half‑duplex) |
| Baud Rate | 1.2 Kbps – 921.6 Kbps (configurable) |
| Data Bits | 8 |
| Parity | None, Even, Odd |
| Stop Bits | 1 or 2 |
| Flow Control | RTS/CTS (enable/disable) |
| Communication Protocols | ASCII, Modbus ASCII |
| Power Input | +10 V DC – +30 V DC |
| Power Connector | 2‑pin screw terminal or DC jack (5.5 × 2.1 × 12 mm) |
| Power Consumption | 1.2 W |
| Wiring Terminal | Plug‑in screw terminal, accepts AWG #12 – 30 wires |
| RS‑422/485 Cable Distance | Up to 4000 ft (≈ 1200 m) |
| Antenna Cable Length | 150 cm |
| LED Indicators | Power, Link, TX, RX |
| Operating Temperature | −10 °C to +50 °C |
| Storage Temperature | −20 °C to +70 °C |
| Humidity | 10 – 90 % RH, non‑condensing |
| Dimensions | 151 mm (L) × 75 mm (W) × 26 mm (H) |
| Weight | ≈ 400 g |
| Enclosure | Industrial metal housing |
| Mounting | DIN‑rail or panel mount |

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### 4. Functionality

The TRP‑C51B functions as a wireless serial bridge, replacing traditional RS‑232/422/485 cabling with a transparent Bluetooth link. It can operate in two primary modes:

1. Direct Link Mode:
The converter connects directly to a Bluetooth‑enabled host (PC, laptop, or PDA). The host’s Bluetooth stack creates a virtual COM port, allowing legacy serial applications to communicate wirelessly without modification.

2. Paired Mode:
Two TRP‑C51B units form a point‑to‑point wireless serial link. Once powered, they automatically connect and emulate a physical serial cable, enabling communication between two serial devices such as PLCs, sensors, or controllers.

Applications and Use Cases:
- Industrial automation and process control
- Remote monitoring and data acquisition (SCADA)
- PLC‑to‑PLC or PLC‑to‑HMI communication
- Wireless connection for serial instruments, barcode scanners, or sensors
- Replacement of long or hard‑to‑install serial cabling in factories or warehouses

Compatibility:
Compatible with Windows systems via the TRP‑BT configuration utility. Works with most Bluetooth USB dongles (e.g., Ergotech ET‑BD121) and standard Bluetooth‑enabled PCs or PDAs.

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### 5. Components & Accessories

Included Components:
- TRP‑C51B main unit
- Detachable antenna (standard)
- Plug‑in screw terminal block for RS‑422/485 connection
- User manual and support CD (includes TRP‑BT configuration utility and TRPCOM test software)

Optional Accessories:
- Directional outdoor antenna (extends range up to 1 km)
- Ergotech ET‑BD121 USB Bluetooth dongle (for PCs without built‑in Bluetooth)
- DIN‑rail mounting kit
- External DC power adapter (+10 V – +30 V DC, 500 mA)
- Null‑modem cable (female‑to‑female) for RS‑232 configuration

Connectors:
- DB‑9 male connector (RS‑232 interface, DTE configuration)
- 2‑pin power terminal block
- Industrial plug‑in screw terminal for RS‑422/485
- SMA antenna connector

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### 6. Installation & Setup

Power Connection:
The TRP‑C51B can be powered via either the 2‑pin screw terminal or the DC jack. Only one power source should be used at a time.
- Input voltage: +10 V DC – +30 V DC
- Current requirement: 500 mA

Serial Connection:
- RS‑232: Connect to PC COM port using a null‑modem cable (female‑to‑female).
- RS‑422/485: Use the plug‑in screw terminal; supports AWG #12 – 30 wires.

DIP Switch Configuration:
A 2‑pin DIP switch selects the serial interface mode:
- SW1, SW2 = OFF, OFF → RS‑232
- SW1, SW2 = ON, ON → RS‑422/485

Configuration Mode:
A micro‑touch button enables configuration mode. When pressed, the device halts communication, allowing parameter changes via the TRP‑BT utility. After configuration, power cycle the unit to apply settings.

Software Setup (TRP‑BT Utility):
1. Connect TRP‑C51B to PC via RS‑232 (null‑modem cable).
2. Set DIP switch to configuration mode (OFF, OFF).
3. Launch TRP‑BT utility and select the correct COM port.
4. Read current configuration and adjust parameters (baud rate, parity, stop bits, flow control, Bluetooth name, password, master/slave mode).
5. Save settings and power cycle the device.

Default Settings:
- Bluetooth Name: TRP‑C51
- Password: 1234
- Mode: Slave, Discoverable
- Baud Rate: 9600 bps
- Data Bits: 8
- Parity: None
- Stop Bits: 1
- Flow Control: Disabled

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

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### 7. Performance & Capabilities

- Wireless Transmission:
- Standard range: 100 m (open field)
- Typical indoor range: 20 – 30 m
- Extended range: up to 1 km with optional antenna

- Serial Communication Distance:
- RS‑422/485 cable length: up to 4000 ft (≈ 1200 m)

- Data Throughput:
- Supports baud rates from 1.2 Kbps to 921.6 Kbps
- Transparent data transmission with minimal latency

- Power Efficiency:
- Low power consumption (1.2 W typical)
- Operates reliably across wide voltage input range

- Environmental Performance:
- Operating temperature: −10 °C to +50 °C
- Storage temperature: −20 °C to +70 °C
- Humidity tolerance: 10 – 90 % non‑condensing

- Reliability:
- Surge and ESD protection ensure stable operation in industrial environments.
- Automatic reconnection capability in paired mode after power loss or signal interruption.

Limitations:
- Bluetooth V1.2 limits maximum data throughput compared to newer Bluetooth standards.
- Range may be reduced in environments with heavy RF interference or physical obstructions.

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### 8. Standards & Compliance

- Bluetooth Compliance: Bluetooth Specification V1.2, Class 1
- Electrical Protection:
- ±15 kV ESD protection on all serial lines
- Surge protection on RS‑422/485 differential pairs
- Safety and EMC: Designed for industrial environments with robust isolation and grounding provisions.
- Protocol Support: ASCII and Modbus ASCII communication protocols
- Mounting and Wiring Standards: Compatible with industrial DIN‑rail and panel mounting systems; accepts standard AWG #12 – 30 wiring.

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### 9. Additional Information

Warranty:
Standard manufacturer warranty (duration subject to Trycom policy). Covers defects in materials and workmanship under normal use.

Technical Support:
Trycom provides technical assistance via telephone, fax, and online resources. Configuration utilities and firmware updates are available from the Trycom website.

Maintenance:
- Periodically inspect connectors and terminals for secure connections.
- Avoid simultaneous use of both power inputs.
- Keep the antenna and housing free from dust and moisture.

Firmware & Software Updates:
Firmware and configuration utilities (TRP‑BT, TRPCOM) can be downloaded from [www.trycom.com.tw](http://www.trycom.com.tw). Updates may include enhanced baud rate support, improved Bluetooth stability, and expanded protocol compatibility.

Testing & Diagnostics:
Trycom provides the TRPCOM.EXE utility for loopback and communication testing:
- RS‑232, RS‑422, and RS‑485 loopback tests
- Baud rate and COM port verification
- Real‑time data transmission monitoring

Example Test Procedure:
1. Connect TRP‑C51B in loopback configuration.
2. Run TRPCOM.EXE and select COM port and baud rate.
3. Enable loopback mode and verify synchronized transmit/receive counters.

Applications Summary:
The TRP‑C51B is ideal for:
- Wireless replacement of serial cables in industrial automation
- Remote data acquisition and control systems
- PLC‑to‑PLC or PLC‑to‑HMI communication links
- Integration with SCADA systems
- Wireless connection of serial sensors, meters, or instruments

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### Summary

The Trycom TRP‑C51B Bluetooth to RS‑232/422/485 Converter is a robust, industrial‑grade solution for wireless serial communication. Combining Bluetooth Class 1 technology with automatic interface switching, wide power input tolerance, and comprehensive protection features, it provides a reliable and flexible alternative to wired serial connections.

Its dual operation modes—Direct Link and Paired Mode—allow seamless integration into existing systems without hardware or software modification. With support for baud rates up to 921.6 Kbps, extended communication range, and compatibility with standard industrial protocols, the TRP‑C51B is well‑suited for automation, monitoring, and control applications requiring dependable wireless serial connectivity.

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Manufacturer: Trycom Technology Co., Ltd.
Model: TRP‑C51B
Type: Bluetooth to RS‑232/422/485 Converter
Dimensions: 151 × 75 × 26 mm
Weight: 400 g
Power Input: +10 V – +30 V DC
Operating Range: 100 m (standard), up to 1 km (optional antenna)
Interfaces: RS‑232 / RS‑422 / RS‑485 (auto‑switching)
Baud Rate: 1.2 Kbps – 921.6 Kbps
Operating Temperature: −10 °C to +50 °C

This comprehensive summary encapsulates all technical, functional, and operational details of the TRP‑C51B, providing a complete reference for engineers, system integrators, and procurement specialists evaluating wireless serial communication solutions.