1784-PCIC-3 1784-PCIC-2 1784-PCIC-4 1784-PCIC-1

The Allen-Bradley 1784-PCIC is an industrial-grade PCI communication interface module designed to connect personal computers and engineering workstations to Allen-Bradley control networks. Manufactured by Rockwell Automation, this module enables reliable communication with PLC systems through Data Highway Plus (DH+), DH-485, and remote I/O networks in legacy industrial automation environments.

Widely used in maintenance, diagnostics, programming, and migration projects, the 1784-PCIC provides a dependable bridge between modern PCs and classic Allen-Bradley control architectures.

Technical Specifications (including Dimensions & Weight)

Parameter	Specification
Product Type	PCI Communication Interface Module
Series	Legacy PLC Communication
Form Factor	PCI Expansion Card
Supported Protocols	DH+, DH-485, Remote I/O
Compatible PLCs	PLC-5, SLC 500, PLC-2, PLC-3
Connector Type	8-pin mini-DIN and network interface connector
Communication Speed	Up to 230.4 Kbps (network dependent)
Operating Voltage	PCI bus powered
Installation Type	Internal PC PCI slot
Operating Temperature	0°C to 60°C

Physical Dimensions & Weight

Item	Value
Size (L × W × H)	175 × 107 × 20 mm
Weight	~0.20 kg

Recommended Related Models

1784-PKTX – DH+/DH-485 communication card
1784-KTX – ISA communication interface module
1784-U2DHP – USB to DH+ interface converter
1756-EN2T – EtherNet/IP communication module
1761-NET-ENI – Ethernet interface for MicroLogix systems

Popular Allen-Bradley Models

1756-L81E ControlLogix Processor Module
1769-L33ER CompactLogix Controller
1756-EN2T EtherNet/IP Communication Module
1747-L552 SLC 5/05 Processor
1734-IB8 POINT I/O Input Module

Applications

The 1784-PCIC is commonly used in:

PLC-5 and SLC 500 programming environments
Legacy industrial network diagnostics
DH+ and DH-485 communication systems
SCADA and HMI workstation integration
Factory modernization and migration projects
Maintenance support for older Rockwell platforms

It is especially valuable in industrial plants that continue to operate legacy Allen-Bradley automation infrastructure.

Advantages

Reliable PC-to-PLC communication for legacy networks
Supports multiple Allen-Bradley industrial protocols
Stable performance for diagnostics and programming tasks
PCI architecture offers faster communication than older ISA cards
Simplifies maintenance of legacy automation systems
Strong compatibility with Rockwell software environments
Rugged industrial communication reliability
Ideal for migration and retrofit projects

Technical FAQs

1. What is the main purpose of the 1784-PCIC?
It allows PCs to communicate with Allen-Bradley DH+, DH-485, and remote I/O networks.

2. Which PLC families are supported?
PLC-5, SLC 500, PLC-2, and PLC-3 systems.

3. Is this an Ethernet communication module?
No, it is designed for legacy Allen-Bradley communication protocols.

4. What type of PC slot does it require?
A standard PCI expansion slot.

5. Can it work in modern computers?
Only if the PC still includes legacy PCI slots or compatible adapters.

6. What software commonly uses this module?
RSLogix, RSLinx, and legacy Rockwell programming tools.

7. Does it support USB connection?
No, this model is PCI-based; USB alternatives exist separately.

8. Is it still actively manufactured?
It is considered a mature or legacy industrial product.

9. What is the difference between PCIC and PKTX?
The PCIC uses PCI architecture, while PKTX supports additional communication flexibility and different interfaces.

10. Why is it still important in industry?
Many facilities continue operating PLC-5 and SLC systems that depend on DH+ and DH-485 communication.

Look forward to your comments!Comment