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- Allen Bradley
- 1734-485ASC
- Point I/O Module
- USA
- 56 × 12 × 75.5 mm
- 0.03kg
- Xiamen, China
- New & In Stock
- T/T, PayPal, Western Union
- 1 Year
- 1-3 Working Days
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We have a 10-year logistics and express cooperation agreement, so our products can be shipped to any place in the world.
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Our products are imported in bulk from the place of origin. Because of the cooperative relationship, our products are all original and 100% new.
24-hour service
We provide 7*24 hours service to our customers. We will be there whenever you need us.
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All our products are priced very favorably because we have our own warehouse and supply.
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Allen Bradley 1734-485ASC — Detailed Technical Overview (POINT I/O RS-485 Serial Module)
1. Product Overview
The Allen Bradley 1734-485ASC is an industrial-grade RS-485 ASCII serial communication module designed for distributed I/O systems. It enables reliable data exchange between programmable controllers and field devices that use RS-485 communication.
This module is typically used in systems where long-distance communication, noise immunity, and multi-device networking are required. Compared with RS-232 modules, RS-485 provides better signal stability and supports multi-drop communication, making it suitable for complex industrial environments.
Its compact housing allows installation in tight control panels, and it integrates seamlessly into modular automation architectures.
2. Brand and Series
- Brand: Allen Bradley
- Series: POINT I/O (1734 Series)
- Product Type: RS-485 ASCII Communication Module
The POINT I/O system is designed for distributed control, enabling flexible combinations of digital, analog, and communication modules in a single node.
3. Technical Parameters
Parameter Table
| Parameter | Specification |
|---|---|
| Model | 1734-485ASC |
| Module Type | ASCII Serial Interface |
| Communication Interface | RS-485 (Half/Full Duplex) |
| Number of Ports | 1 |
| Protocol | ASCII |
| Network Capability | Multi-drop (up to multiple nodes) |
| Baud Rates | 1200, 2400, 4800, 9600, 19200, 38400 |
| Data Bits | 7 / 8 |
| Parity | None / Even / Odd |
| Stop Bits | 1 / 2 |
| Isolation | Yes (signal isolation for noise immunity) |
| Supply Voltage | 24V DC |
| Voltage Range | 10–28.8V DC |
| Supply Current | Approx. 15–20 mA |
| Backplane Current | Approx. 75 mA @ 5V DC |
| Power Consumption | ≤ 1 W |
| Operating Temperature | -20°C to +55°C |
| Storage Temperature | -40°C to +85°C |
| Humidity | 5–95% non-condensing |
| Mounting | DIN Rail |
| Dimensions | Approx. 56 × 12 × 75.5 mm |
| Weight (kg) | Approx. 0.03 kg |
4. Product Features
The 1734-485ASC is designed for robust industrial communication, especially in electrically noisy environments.
It supports RS-485 multi-node communication, allowing several devices to be connected on a single bus, reducing wiring complexity.
Flexible communication parameters such as baud rate, parity, and framing allow compatibility with a wide range of third-party devices.
The module includes LED indicators for transmit, receive, module status, and network status, providing clear visual diagnostics.
Hot-swappable capability ensures maintenance can be performed without shutting down the entire system.
5. Typical Applications
The module is widely used in industrial automation scenarios requiring stable and long-distance communication:
- Industrial weighing systems with RS-485 output
- Distributed sensor networks
- Building automation systems
- Energy monitoring devices
- PLC-to-PLC communication over serial networks
- Remote terminal units (RTUs)
Its multi-drop capability makes it ideal for systems where multiple field devices share a single communication line.
6. Product Advantages
Strong Anti-Interference Capability
RS-485 communication provides excellent noise immunity, making it reliable in harsh industrial environments.
Multi-Device Networking
Supports multiple devices on one bus, reducing installation cost and complexity.
Compact and Modular Design
Fits easily into distributed I/O systems with minimal space requirements.
Flexible Configuration
Wide range of communication settings ensures compatibility with various devices.
High Reliability
Designed for continuous industrial operation with stable data transmission.
Easy Maintenance
Hot swap capability and LED diagnostics simplify troubleshooting and reduce downtime.
7. Recommended Models (Same Series or Related)
POINT I/O Series Related Models
| Model | Type | Channels / Ports | Voltage | Dimensions (mm) | Weight (kg) |
|---|---|---|---|---|---|
| 1734-485ASC | RS485 ASCII | 1 Port | 24V DC | 56×12×75.5 | 0.03 |
| 1734-232ASC | RS232 ASCII | 1 Port | 24V DC | 56×12×75.5 | 0.03 |
| 1734-IB8 | Digital Input | 8 Inputs | 24V DC | 56×12×75.5 | 0.04 |
| 1734-OB8 | Digital Output | 8 Outputs | 24V DC | 56×12×75.5 | 0.04 |
| 1734-IE4C | Analog Input | 4 Channels | 24V DC | 56×12×75.5 | 0.05 |
| 1734-OE4C | Analog Output | 4 Channels | 24V DC | 56×12×75.5 | 0.05 |
8. Recommended Popular Models (Same Brand)
Popular Models
| Model | Type | Key Function | Voltage | Dimensions (mm) | Weight (kg) |
|---|---|---|---|---|---|
| 1769-L33ER | PLC Controller | Compact control processor | 24V DC | 118×87×87 | 0.50 |
| 1756-EN2T | Communication | Ethernet/IP module | 24V DC | 145×35×140 | 0.30 |
| 1734-AENT | Adapter | Ethernet adapter | 24V DC | 56×12×75.5 | 0.04 |
| 1794-IE8 | Analog Input | 8-channel analog input | 24V DC | 94×94×69 | 0.20 |
| 5069-IB16 | Digital Input | 16-point input module | 24V DC | 138×42×95 | 0.25 |