1784-U2DHP Alternative: USB to Data Highway Plus (DH+) Programming Cable
If you are searching for a cost-effective 1784-U2DHP alternative, the original Allen-Bradley USB to Data Highway Plus (DH+) cable remains active in Rockwell Automation’s catalog but commands prices of over $3,000 USD new. Specifically, beyond the high acquisition cost and standard distributor quoting cycles, automation maintenance teams frequently encounter driver friction when configuring legacy RSLinx Classic drivers on modern 64-bit Windows 11 laptops.
The ANC-120e serves as an economical, field-proven 1784-U2DHP alternative, providing seamless USB-to-DH+ connectivity for Windows 10 and Windows 11 (32-bit and 64-bit) environments at a fraction of the OEM cost—shipping immediately from stock.
1784-U2DHP at a glance
- What it is: Allen-Bradley USB-to-DH+ programming cable
- Connects to: PLC-5 and SLC 5/04 through the 8-pin mini-DIN DH+ port
- RSLinx Classic driver: 1784-U2DHP for DH+ (uses the COM port assigned to the cable)
- DH+ address: any node 0–77 octal (default station 0)
- Price new: over $3,000 USD
- Alternative: ANC-120e, $995, in stock and ready to ship
Why Choose the ANC-120e as a 1784-U2DHP Alternative
Unlike legacy interface cards (such as 1784-PKTX, 1784-PCMK, and 1770-KF2) or high-priced OEM cables with long distributor lead times, the ANC-120e delivers reliable engineering access:
- Modern OS Support: Fully verified on Windows 10, Windows 11, Windows 7, and Windows XP (32/64-bit native architecture) without requiring virtual machines.
- RSLinx Classic & FactoryTalk Linx Compatible: Seamlessly emulates a 1784-U2DHP / 1784-PKTX interface—enabling full programming, upload, download, and online monitoring in RSLogix 5 (PLC-5) and RSLogix 500 (SLC 5/04).
- Automatic DH+ Baud Rate Detection: Automatically connects across standard 57.6 kbps, 115.2 kbps, and 230.4 kbps DH+ networks without manual switch configuration.
- Auto-Polarity Wire Detection: Automatically adjusts to network wiring polarity, eliminating communication faults caused by reversed Blue Hose leads.
- Complete Cable Kit Included: Ships with both a 3-pin Phoenix connector and an 8-pin mini-DIN cable for direct connection to processor programming ports.
Technical Specification Comparison: ANC-120e vs. OEM 1784-U2DHP
Compare technical capabilities, pricing, and system compatibility between the active OEM cable and the ANC-120e:
| Specification | ANC-120e Cable | Rockwell 1784-U2DHP (OEM Active) |
|---|---|---|
| Operating System Support | ✅ Windows 10 / 11 / 7 (32 & 64-bit Native) | Windows 10 / 7 (Complex Win 11 64-bit setup) |
| Automatic Baud Rate Detection | ✅ Yes (57.6k, 115.2k, 230.4k) | Manual software configuration |
| Automatic Polarity Detection | ✅ Yes – Auto-detects wiring polarity | ❌ No – Polarity sensitive |
| Included PLC Cables | ✅ 8-Pin Mini-DIN + Phoenix Included | Accessories often quoted separately |
| Hardware Warranty | ✅ Lifetime Replacement Warranty | Standard 1-Year Factory Warranty |
| Lifecycle & Lead Time | ✅ Active / In Stock (Ready to Ship) | Active Catalog (Distributor Lead Times) |
| Purchase Price (USD) | $995.00 USD (In Stock, Ready to Ship) | Over $3,000 USD (new) |
Replacing Legacy 1784-KTX, 1784-PKTX and 1784-PCMK Cards
Before the USB cable, Allen-Bradley connected PCs to DH+ through internal cards and a laptop card. Rockwell now lists the 1784-PKTX and 1784-PCMK as discontinued, and the older 1784-KTX needs an ISA slot that PCs haven't had for decades.
| Legacy interface | Computer connection | Rockwell lifecycle | Modern replacement |
|---|---|---|---|
| 1784-KTX / KTXD | ISA / EISA card for desktop PCs | Legacy | ANC-120e (USB), or ANC-100e for a networked PC |
| 1784-PKTX / PKTXD | PCI card for desktop PCs | Discontinued | ANC-120e (USB), or ANC-100e for a networked PC |
| 1784-PCMK + 1784-PCM5 / PCM6 cable | PCMCIA Type II card for laptops | Discontinued | ANC-120e |
The ANC-120e connects through any USB port and works with RSLinx Classic on Windows 10 and 11, so the laptop you already have becomes your DH+ programming terminal. If the old card sat in a desktop that stays connected to the plant network, the ANC-100e puts the whole DH+ network on Ethernet instead.
Permanent Network Integration vs. Laptop Service Cable
Depending on whether your facility requires on-demand field service access or permanent plant network monitoring:
- Service & Troubleshooting (ANC-120e): Pocket-sized USB cable powered directly by your PC USB port. Ideal for maintenance engineers and field technicians connecting directly to individual machinery.
- Continuous SCADA / HMI Integration (ANC-100e): DIN-rail mount gateway connecting legacy DH+ PLCs permanently to modern EtherNet/IP networks, Ignition, AVEVA Wonderware, Kepware, and PanelView Plus terminals. (See our 1756-DHRIO alternative guide for rack replacement details).
For step-by-step setup procedures and driver walkthroughs, see the ANC-120e User's Guide.
Field-proven 1784-U2DHP alternative. Connect your laptop to PLC-5 and SLC 5/04 controllers via USB on Windows 10 & 11.
- • Windows 10 & 11 (64-bit) native support
- • Cost-effective 1784-U2DHP alternative
- • Auto Baud & Auto Polarity detection
DIN-rail gateway for permanent SCADA, HMI, and PanelView Plus integration to legacy DH+ PLCs.
- • Standalone DH+ gateway architecture
- • Ignition, Kepware & FactoryTalk compatible
- • Lifetime Warranty & 30-day money-back satisfaction guarantee
Why pay upwards of $3,000 USD through slow distributor quoting cycles? The ANC-120e provides factory-warrantied USB to DH+ connectivity for Windows 10 & 11 PCs, backed by in-stock units ready to ship from the USA and a 30-day money-back satisfaction guarantee.