Product Details
Module Overview
The 1784-PCMK is a high-performance, legacy communication interface card designed to link portable computers (laptops) to Allen-Bradley industrial networks. Utilizing a standard PCMCIA Type II slot, this card serves as the primary gateway for maintenance and programming of PLC-5, SLC 500, and ControlLogix systems over Data Highway Plus (DH+), DH-485, and Universal Remote I/O (RIO) networks. Although classified as a discontinued/obsolete product, the 1784-PCMK remains a vital tool for field engineers supporting established manufacturing facilities that rely on legacy Rockwell Automation networking protocols.
Detailed Engineering Specifications
The 1784-PCMK is a highly specialized networking bridge, engineered for the deterministic requirements of industrial communication.
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Form Factor: PCMCIA Type II Card
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Supported Networks: Data Highway Plus (DH+), DH-485, and Universal Remote I/O (RIO)
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Baud Rates: 57.6k, 115.2k, and 230.4k bps (Network dependent)
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Isolation Voltage: Tested to 500V DC
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Compatible Cables: * 1784-PCM5/B (for PLC-5/SLC 500 DH+)
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1784-PCM6/B (for SLC 500 DH-485)
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1784-PCM2/B and 1784-PCM4/B (General purpose interface)
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Power Consumption: 0.6 Watts (Maximum)
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Environmental Rating: Pollution Degree 2
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Application Rating: Overvoltage Category II
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ESD Sensitivity: Highly Sensitive (Requires static-safe handling)
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Physical Weight: 0.06 lbs (0.03 kg)
Network Integration and Connectivity
The 1784-PCMK operates as a peer-to-peer node on the network. When configured correctly in RSLinx Classic software, it allows a laptop to act as a programming terminal, data collector, or HMI interface. The card’s Series B designation is significant, as it introduced enhanced compatibility with Windows-based operating systems and improved noise immunity for DH+ communications.
Installation and Driver Support
To utilize the 1784-PCMK, the card must be inserted into a physical PCMCIA slot. In modern computing environments where these slots are no longer standard, users often attempt to use PCI-to-PCMCIA adapters or older "Toughbook" style laptops that retain the original hardware interface. The drivers are integrated into RSLinx Classic; however, newer 64-bit operating systems (Windows 10/11) generally do not support the legacy drivers required for the PCMK card, often necessitating a dedicated "maintenance laptop" running 32-bit Windows XP or Windows 7.
Technical FAQ
Can I use the 1784-PCMK to connect to a modern Ethernet-based ControlLogix system?
No. The 1784-PCMK is strictly for serial-based legacy networks (DH+, DH-485, RIO). To connect to modern systems, you would use a standard Ethernet port or a 1784-U2DN for DeviceNet.
What is the difference between the 1784-PCMK and the 1784-U2DHP?
The 1784-U2DHP is a modern USB-to-DH+ converter that serves as the functional successor to the PCMK. It is compatible with modern 64-bit operating systems and does not require a PCMCIA slot.
Why is my card not being recognized in RSLinx?
This is often due to an IRQ (Interrupt Request) conflict within the laptop's hardware settings. Legacy PCMCIA cards require a dedicated IRQ, which must be manually reserved in the Windows Device Manager to ensure the RSLinx driver can communicate with the card.
Additional Information
- 100% Genuine Parts: All products are original and authentic, ensuring reliable industrial performance.
- 30-Day Refund Guarantee: Return any in-stock item within 30 days in original, unopened packaging for a full refund (excluding shipping and fees).
- 12-Month Warranty: Covers defects in materials or workmanship; excludes misuse, normal wear, or unauthorized modifications.
- Worldwide Shipping: We ship via USPS, UPS, FedEx, and DHL. Delivery times vary by country and may be subject to customs or import fees.
- Support & Contact: Technical and warranty assistance is available anytime. Contact us here: Contact.
- Purchase Guidance: Check product specifications and compatibility carefully before ordering to ensure proper application.
Tech & Buying Guide
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