Overview
The Allen-Bradley 1784-PCM2 is a specialized direct connect cable assembly engineered to interface PLC-2 and Mini PLC-2 processors with the 1784-PCMK PCMCIA card installed in notebook computers. This cable enables engineers and technicians to perform on-site programming, troubleshooting, and diagnostics using portable equipment. Series B versions support improved baud rate communications and compatibility with modern RSLinx software drivers.
Key Features
- Direct connect design links PLC-2 controllers to 1784-PCMK network adapter cards
- 15-pin D-shell connector rated for reliable industrial use
- 10.4-foot (3.16 meter) cable length for adequate reach in control cabinets
- Series B version supports high-speed 230.4K baud communication with reduced latency
- Integrated strain relief wedges prevent accidental disconnection during operation
- Compatible with RSLinx Classic drivers for legacy DH-485 and DH+ networks
Technical Specifications
| Part Number | 1784-PCM2 (Series B: 1784-PCM2/B) |
| Manufacturer | Allen-Bradley / Rockwell Automation |
| Connector Type | 15-Pin D-Shell (proprietary) |
| Cable Length | 3.16 meters (10.4 feet) |
| Weight | ~1.25 lbs (0.57 kg) |
| Network Support | DH-485, DH+, Remote I/O |
| Baud Rate (Series B) | 57.6K, 115.2K, 230.4K |
| Compatible Card | 1784-PCMK (PCMCIA Type II) |
| Status | Discontinued by manufacturer (07/2017) |
| Certifications | Legacy industrial automation standard |
Typical Applications
- Factory floor programming and parameter updates on PLC-2 systems
- Real-time system diagnostics and troubleshooting via laptop connection
- Loopback connector testing for network diagnostics and verification
- Integration with legacy DH-485 and DH+ automation networks in manufacturing facilities
- Support for maintenance and commissioning of vintage Allen-Bradley control systems
Compatibility & Replacements
Compatible With
- Allen-Bradley PLC-2 and Mini PLC-2 processors
- 1784-PCMK/B PCMCIA communication card (Series B)
- DH-485 and DH+ industrial networks
- RSLinx Classic software (v2.6+ SP5 recommended for Series B)
- Notebooks and laptops with PCMCIA Type II card slots
- Legacy Rockwell Automation control systems requiring portable programming
Replaces / Drop-In Replacement For
- Original Allen-Bradley 1784-PCM2 Series A (Series B is successor version)
- Direct replacement for worn or damaged 1784-PCM2/B cables in existing systems
- Not compatible with PLC-5, SLC 500, or ControlLogix—verify controller type before ordering
Works With
- RSLinx Classic drivers (PCMK DH+ card integration)
- Allen-Bradley PLC-2 programming software
- DH-485 and DH+ communication protocols
- Remote I/O networks via 1784-PCMK card
- Windows XP and legacy operating systems with PCMCIA support
