Milestone Electronics
Model: LD-15PN24V
RS232 to RS422 / RS485 Panel Mounted Converter (24V)
A panel-mounted serial converter that bridges RS232 devices with RS422 and RS485 communication networks. Powered by 24V DC and designed for secure installation within industrial control cabinets and automation systems.
- Converts RS232 signals to RS422 or RS485 communication protocols
- Operates on 24V DC power supply, standard in industrial environments
- Panel-mounted design for secure installation in control cabinets
- Supports RS485 multi-device bus communication for automation networks
- Enables legacy RS232 equipment to operate within modern industrial networks
Max Resolution
1080p Full HD
Audio Input
Stereo Analogue
Output
Single HDMI
- In-house manufactured
- 24hr response
- 2,000+ clients served
Product Overview
What makes the LD-15PN24V
The LD-15PN24V is an RS232 to RS422/RS485 converter built for industrial panel installations. It allows RS232 devices such as computers, programmable controllers, industrial instruments, and communication equipment to interface directly with RS422 or RS485 communication networks. This capability enables legacy RS232 equipment to operate within modern industrial environments without requiring significant system modifications or hardware replacement.
RS232 communication is widely used for point-to-point device communication, while RS422 and RS485 protocols provide superior signal stability, improved noise immunity, and the ability to communicate over substantially longer cable distances. The LD-15PN24V supports both RS422 and RS485 output modes, giving system designers the flexibility to integrate the converter into a range of industrial network topologies.
RS485 communication further enables multi-device bus architectures, where several field devices share the same communication line. By converting RS232 signals to RS485 format, the converter allows a single controller or computer to communicate with multiple devices across the same network, which is particularly valuable in distributed automation and monitoring systems.
The converter is powered by a 24V DC supply, the standard power configuration across most industrial control environments, ensuring stable and continuous operation within automation systems, process control installations, and monitoring networks.
Input Interface
Output Interface
RS422 Signals
Power Supply
Mounting
Application
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Key Features
Built for industrial serial communication
One RS232 input. Dual-protocol output supporting RS422 and RS485. Designed for panel-mounted deployment across automation, control, and monitoring environments.
RS232 to RS422 / RS485 Conversion
Accepts standard RS232 signals including TX, RX, and GND, and converts them into differential signals used by RS422 and RS485 protocols. Enables direct integration of RS232 devices into modern industrial communication networks.
- Accepts RS232 TX, RX, and GND signals
- Outputs RS422 or RS485 differential signals
- No modifications required on existing RS232 equipment
RS422 Differential Signal Support
Supports RS422 communication using balanced differential signal pairs including +TX, -TX, +RX, and -RX. Differential transmission provides improved noise immunity and stable data transfer across longer cable runs in industrial environments.
- Full differential signal pairs: +TX, -TX, +RX, -RX
- Improved noise immunity over single-ended RS232
- Suitable for point-to-point industrial communication
RS485 Multi-Device Bus Support
Supports RS485 communication, enabling multiple field devices to share the same communication bus. Allows a single RS232 controller to communicate with distributed devices across automation systems, monitoring networks, and control architectures.
- Multi-device shared communication bus
- Ideal for distributed control and monitoring systems
- Compatible with standard RS485 field devices
Panel-Mounted Industrial Design
Designed specifically for panel-mounted installation within industrial control cabinets and equipment enclosures. The secure mounting configuration protects the converter from environmental factors and mechanical disturbance common in industrial settings.
- Secure mounting within control panels and cabinets
- Protection from environmental and mechanical factors
- Suitable for automation systems and control rooms
24V DC Industrial Power Input
Operates from a 24V DC power supply, the standard voltage level used across industrial control environments. This ensures stable, continuous operation within automation systems, process monitoring installations, and factory control panels without additional power conversion.
- 24V DC input matches industrial standard power
- Stable operation in continuous-duty environments
- Compatible with common industrial panel power supplies
Long-Distance Reliable Data Transfer
By converting RS232 signals into differential RS422 or RS485 format, the converter enables reliable data communication over substantially greater distances than RS232 alone supports. Critical for large industrial plants, remote monitoring setups, and distributed field device networks.
- Differential signaling for extended cable distances
- Reduced signal degradation over long cable runs
- Reliable performance in electrically noisy industrial sites
Installation
Panel installation. Straightforward integration.
The LD-15PN24V is designed for panel-mounted deployment within industrial control enclosures. Installation follows a structured sequence covering physical mounting, signal wiring, and power connection.
01
Mount the Converter in the Panel
Secure the LD-15PN24V within the industrial control panel or equipment cabinet using the panel-mount configuration. The mounting design ensures a stable, protected installation shielded from environmental factors and mechanical disturbance within the enclosure.
02
Connect the RS232 Source Device
Wire the RS232 input signals from the source device, such as a computer, programmable controller, or industrial instrument, to the converter's RS232 interface terminals. The standard RS232 signals required are TX, RX, and GND.
03
Wire the RS422 or RS485 Output
Connect the appropriate RS422 or RS485 output terminals to the target communication network. For RS422, wire the differential signal pairs: +TX, -TX, +RX, and -RX. For RS485, connect to the shared bus used by the multi-device network.
04
Connect the 24V DC Power Supply
Connect the 24V DC power supply to the converter's power input terminals. Once powered, the converter is operational and provides continuous, stable serial signal conversion within the installed system. No software configuration is required.
Designed for industrial communication environments
Industrial Automation and Process Control
Connects RS232-based computers and controllers to RS485 automation networks, enabling centralized control of field devices, actuators, and process equipment across manufacturing and process plants.
Data Acquisition and Instrumentation Systems
Allows RS232 data acquisition hardware and industrial instruments to communicate over RS422 or RS485 links, supporting reliable sensor data collection and measurement across laboratory and plant environments.
Serial Communication Interface Conversion
Provides a direct conversion path between RS232 legacy interfaces and RS422 or RS485 industrial protocols, enabling system integrators to retain existing RS232 equipment while migrating to modern communication infrastructure.
Building Management and Facility Automation
Integrates RS232 building management controllers with RS485 field device networks covering HVAC, access control, lighting, and energy monitoring systems across commercial and industrial facilities.
Remote Monitoring and Industrial Communication Networks
Enables RS232 monitoring equipment to transmit data over RS422 or RS485 links across greater distances, supporting remote station monitoring, telemetry systems, and distributed field communication architectures.
Monitoring and Control Networks
Serves as the serial interface converter in SCADA, DCS, and distributed control networks where RS232 operator stations or HMI devices must communicate with RS485 field controllers and remote I/O modules across a shared network bus.
Full specification sheet
- Communication Interfaces
- Power
- Mounting and Installation
- General
Frequently asked questions
What does the LD-15PN24V RS232 to RS422 / RS485 converter do?
The LD-15PN24V converter allows RS232 devices to communicate with RS422 or RS485 networks. It accepts standard RS232 signals including TX, RX, and GND from connected equipment, converts them into differential signals used by RS422 and RS485 protocols, and enables legacy RS232 equipment to operate within modern industrial communication networks without requiring significant system modifications.
Why would I need to convert RS232 to RS422 or RS485?
RS422 and RS485 support longer cable distances and offer better noise resistance compared to RS232. RS485 also supports multi-device bus communication, allowing multiple field devices to share a single communication line. Using this converter improves communication reliability and extends the reach of your serial network, especially in electrically noisy industrial environments.
Is the LD-15PN24V suitable for industrial panel installation?
Yes. The LD-15PN24V is specifically designed for panel-mounted installation within industrial control panels and equipment cabinets. The panel-mount design ensures secure placement and provides protection from environmental factors and mechanical disturbance, which is essential for reliable long-term operation in industrial settings.
What type of power supply does this converter require?
The LD-15PN24V operates on a 24V DC power supply, which is the standard power configuration widely used in industrial control environments. This ensures stable and continuous performance within automation systems, process control panels, and industrial monitoring installations without requiring a separate power converter.
Where is the LD-15PN24V converter commonly used?
The converter is widely used in industrial automation, process control systems, monitoring and control networks, data acquisition and instrumentation systems, building management and facility automation, and remote monitoring networks where reliable serial communication between RS232 devices and RS422 or RS485 field devices is required.
Can the LD-15PN24V support communication with multiple field devices on the same network?
Yes. When configured for RS485 output, the converter supports multi-device bus communication, which allows several devices to share the same communication line. This makes it suitable for distributed automation systems, monitoring networks, and control architectures where a single RS232 controller needs to communicate with multiple RS485 field devices connected to the same bus.
What is the difference between RS422 and RS485 output modes on this converter?
RS422 uses separate differential signal pairs for transmit and receive (+TX, -TX, +RX, -RX) and is suited for point-to-point communication between two devices, such as a controller and a single instrument. RS485 uses a shared bus configuration and supports multiple devices on the same communication line, making it more suited to multi-device industrial networks found in automation and distributed monitoring systems. The LD-15PN24V supports both protocols, giving you flexibility in network design.
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