Allen-Bradley 1747-PIC – PC Interface Converter | SLC 500 / MicroLogix Platform
工程背景 | Engineering Background
The Allen-Bradley 1747-PIC (PC Interface Converter) is a dedicated serial communication bridge developed by Rockwell Automation for the SLC 500 and MicroLogix control platforms. It converts the RS-232 serial port of a PC or HMI into the DH-485 token-passing network protocol, enabling direct programming, monitoring, and data exchange between a host computer and SLC 500 / MicroLogix PLCs without requiring a dedicated communication coprocessor card.
产品定位 | Product Positioning
The 1747-PIC is the standard, low-cost entry point for DH-485 connectivity in legacy SLC 500 installations. It is widely deployed in manufacturing, water treatment, material handling, and building automation environments where RS-232-to-DH-485 bridging is required for RSLogix 500 programming sessions, SCADA polling, or HMI integration. Konmask.com supplies both new-surplus and factory-refurbished units, each verified against Rockwell Automation OEM specifications before shipment.
Complete Technical Specifications
| Parameter | Specification |
|---|---|
| Catalog Number | 1747-PIC |
| Manufacturer | Allen-Bradley / Rockwell Automation |
| Product Family | SLC 500 / MicroLogix Accessories |
| Function | RS-232 to DH-485 Protocol Converter |
| Host Interface | RS-232C (DB-9 Male, DTE) |
| PLC Interface | DH-485 (RJ-45 / 8-pin modular) |
| Baud Rate RS-232 | 1200 / 2400 / 4800 / 9600 / 19200 bps (auto-detect) |
| Baud Rate DH-485 | 1200 / 2400 / 4800 / 9600 / 19200 bps |
| Max DH-485 Nodes | 32 nodes per segment |
| Max Cable Length DH-485 | 1219 m (4000 ft) at 1200 bps |
| Power Supply | Powered via RS-232 RTS/DTR lines (no external power required) |
| Operating Temperature | 0 to +60 deg C (32 to 140 deg F) |
| Storage Temperature | -40 to +85 deg C |
| Relative Humidity | 5% to 95% non-condensing |
| Dimensions | Approx. 38 x 76 x 25 mm |
| Weight | Approx. 300 g (with cable) |
| Certifications | UL Listed, CE Marked |
| Compatible Software | RSLogix 500, RSLinx Classic, FactoryTalk Linx |
| Compatible Hardware | SLC 5/01, 5/02, 5/03, 5/04, 5/05; MicroLogix 1000, 1100, 1200, 1400, 1500 |
Proven Application Environments
- Discrete Manufacturing: RSLogix 500 online programming and firmware downloads to SLC 5/03 and 5/04 processors on the shop floor.
- Water and Wastewater: SCADA polling of MicroLogix 1400 RTUs via DH-485 multi-drop topology at remote pump stations.
- Material Handling and Conveyor Systems: HMI (PanelView) integration with SLC 500 racks using DH-485 as the supervisory network.
- Building Automation: BACnet/IP gateway bridging through a PC running RSLinx Classic, connected to legacy SLC 5/02 controllers.
- OEM Machine Retrofit: Replacing failed communication modules in installed machines without rewiring the existing DH-485 trunk cable.
- Maintenance and Diagnostics: Portable laptop-based troubleshooting of SLC 500 programs in the field using a single 1747-PIC dongle.
Engineering Advantages
- Bus-Powered Operation: Draws power directly from the PC RS-232 handshake lines — no wall adapter, no panel wiring, no additional power budget required.
- Auto Baud-Rate Detection: Automatically negotiates baud rate on both the RS-232 and DH-485 sides, eliminating manual DIP-switch configuration errors.
- Multi-Drop Network Support: Supports up to 32 nodes on a single DH-485 segment, suitable for multi-PLC installations without additional repeaters at moderate distances.
- Plug-and-Play with RSLinx Classic: Recognized natively by RSLinx Classic as a 1747-PIC/AIC driver — no third-party driver installation required on Windows 7/10/11.
- Compact Form Factor: Inline dongle design attaches directly to the PC COM port, minimizing cable clutter in panel environments.
- Proven Field Reliability: Millions of units deployed globally since the 1990s; extensive spare-parts ecosystem and documented troubleshooting procedures available from Rockwell Automation.
System Architecture and Signal Flow
The 1747-PIC operates as a transparent protocol converter in the following signal chain:
[PC / Laptop] RS-232 COM Port (DB-9) → [1747-PIC Converter] → DH-485 Trunk Cable → [SLC 500 / MicroLogix DH-485 Port] → [PLC Backplane / CPU]RSLinx Classic on the host PC manages the token-passing protocol overhead. The 1747-PIC handles the electrical-level conversion (RS-232 voltage levels to DH-485 differential signaling) and the framing translation between the two protocols. No firmware resides in the 1747-PIC itself — all protocol intelligence is managed by RSLinx Classic.
Sourcing and Quality Verification
All 1747-PIC units supplied by Konmask.com undergo the following verification process before dispatch:
- Visual inspection: housing integrity, connector pin condition, cable jacket continuity.
- Functional test: RSLinx Classic driver enumeration and successful online connection to a live SLC 5/03 test rack.
- Baud-rate sweep: verified at 1200, 9600, and 19200 bps on both interfaces.
- Label verification: catalog number, series revision, and date code cross-referenced against Rockwell Automation product records.
Units are sourced from authorized distributors, factory-surplus channels, and certified refurbishers. Counterfeit or unverified units are rejected at intake. A test report is available upon request for critical infrastructure procurement.
Procurement Process
- Confirm Compatibility: Verify your SLC 500 or MicroLogix processor series and the COM port type on your programming PC (DB-9 RS-232 or USB-to-serial adapter required for modern laptops).
- Place Order: Add to cart and complete checkout. Orders placed before 14:00 CST ship same business day.
- Receive and Inspect: Unit ships with a test certificate. Inspect on arrival and contact support within 48 hours if any discrepancy is found.
- Install RSLinx Classic: Download RSLinx Classic Lite (free) or RSLinx Classic from Rockwell Automation. Configure a 1747-PIC/AIC driver pointing to your COM port.
- Connect and Verify: Plug the 1747-PIC into the PC COM port and the DH-485 port on the SLC 500 or MicroLogix. RSLinx Classic should enumerate the PLC within 10 to 30 seconds.
Technical FAQ
Q: Can the 1747-PIC be used with a USB-to-RS-232 adapter?
A: Yes, but compatibility depends on the USB adapter chipset. Prolific PL2303 and FTDI FT232R chipsets are generally reliable. Avoid generic CH340-based adapters for DH-485 applications due to timing sensitivity.
Q: Is the 1747-PIC compatible with RSLogix 5000 / Studio 5000?
A: No. RSLogix 5000 / Studio 5000 is for ControlLogix and CompactLogix platforms, which use EtherNet/IP or ControlNet — not DH-485. The 1747-PIC is exclusively for SLC 500 and MicroLogix via RSLogix 500.
Q: What is the maximum DH-485 network length with the 1747-PIC?
A: 1219 m (4000 ft) at 1200 bps. At 19200 bps, the maximum recommended length is approximately 100 m (330 ft). Use a 1747-AIC+ for longer runs or electrically noisy environments.
Q: Can the 1747-PIC support multiple PLCs simultaneously?
A: Yes. Up to 32 nodes can share a single DH-485 segment. RSLinx Classic manages token-passing arbitration. The 1747-PIC connects the PC as one node on the network.
Q: What is the difference between 1747-PIC and 1747-UIC?
A: The 1747-UIC is the USB-native successor to the 1747-PIC, eliminating the need for a physical RS-232 COM port. If your PC lacks a DB-9 COM port, the 1747-UIC is the recommended modern alternative.
Q: Does Konmask offer a warranty?
A: Yes. All units carry a 90-day functional warranty. Extended warranty and on-site exchange programs are available for volume procurement — contact support@konmask.com for details.
© 2026 Konmask.com. All rights reserved.
Original Source: https://Konmask.com
Contact: support@konmask.com | +0086 19859288691
