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Product Description
⚠️ HARDWARE CONDITION NOTE: DEFECTIVE BACKLIGHT LAMP (NO ILLUMINATION)
The backlight lamp on this unit is defective and does not light up. The internal motherboard, logic, keypad buttons, and DH+ communication port are functional and responsive. Display graphics and characters are visible on the LCD under external light, but there is no backlight illumination. Offered as-is regarding the screen lamp (requires backlight lamp replacement or ideal for parts/keypad/board harvesting). Actual unit photos are shown.
Allen-Bradley 2711-K5A8L1 PanelView 550 Keypad HMI Terminal
Industrial automation operator interface with DH+ (Data Highway Plus) communication port.
Technical Specifications
| Manufacturer Part Number (MPN) | 2711-K5A8L1 |
| Series / Revision / Firmware | Series F, Rev H, FRN 3.40 (24 VDC, 18W) |
| Product Reference (SKU) | 2711K5A8L1-04 |
| Brand / Manufacturer | ALLEN-BRADLEY (Rockwell Automation) |
| Hardware Condition | Used - Lamp Defective (Powers On / Keypad & Logic Functional) |
| Display Backlight Status | Defective / Not Illuminating (Needs Lamp Replacement) |
| System Compatibility | Allen-Bradley SLC 500, PLC-5, ControlLogix via DH+ (Data Highway Plus) network |
Functional Testing & Diagnostics
Unit powers on properly with 24V DC. Keypad switches and function keys (F1-F10) are responsive. DH+ port and motherboard are intact. LCD glass shows display characters/graphics but the backlight lamp does not light up. Backlight compartment is accessible from the rear for bulb replacement.
