Refurbished 2711-K3A10L1 PanelView 300 – Tested 128×64 Keypad HMI, DeviceNet Enabled

Description

Technical Specifications

Values are the published platform ratings for the 2711-K3A10L1​ DeviceNet configuration. Series letter, firmware build, and the optional conformal-coat suffix should be read from the rear nameplate, since the front bezel is identical across the K3A family.

Main Features and Advantages

DeviceNet as a first-class interface, not an afterthought

Most micro-HMIs of this era were serial devices pretending to be networked through a gateway. The Allen-Bradley 2711-K3A10L1​ is native DeviceNet slave silicon, so the terminal consumes one node address on the scanner’s I/O connection and behaves like any other DeviceNet drop. Commissioning is the same routine the electrician already runs on the 1771-SDN: set the MAC ID and baud, power the trunk, and watch the green COMM LED settle. There is no RS-485 terminator pair to chase, no token-pass timing to explain to a night-shift tech, and no PIC or UIC dongle occupying a laptop port. For a machine builder, that is fewer unique parts in the spares cabinet.

A screen that refuses to wash out

Transflective construction is the quiet advantage of the 2711-K3A10L1. In a brightly lit fill room or under an overhead halogen, the LCD uses ambient light as its front illumination, so the text actually gains contrast instead of bleaching into grey. In the dark, the 100,000-hour LED backlight takes over. The result is a display you can read from an angle while walking past the skid, something the old vacuum-fluorescent units never managed. Because the backlight is an LED assembly rather than a CCFL tube, cold starts at 0 °C do not produce the slow warm-up flicker that used to strand a shift supervisor.

Keypad certainty under gloves and vibration

The stainless-steel domed membrane on the Allen-Bradley 2711-K3A10L1​ gives a crisp tactile click at two million presses per key. That matters on a bagger line where the operator is wearing nitrile or a cut-resistant glove, and it matters more on a vibratory feeder where a finger resting on a touchscreen would be interpreted as a press. The F1–F8 row maps directly to the PLC integer or bit file you already defined in PanelBuilder32, so “Jog,” “Reset,” “Auto,” and “Fault Ack” are physical positions the operator learns by muscle memory. A printed legend insert turns the same eight keys into a new machine recipe without changing a wire.

Project continuity without a migration project

The 240 KB nonvolatile store holds application objects, text, and bitmaps while the 170 KB runtime workspace keeps the active screen and alarm lists live. Load the archived .PVA from PanelBuilder32 through the RS-232 port or overwrite it from an ATA card, and the 2711-K3A10L1​ is behaviorally identical to the unit it replaced. There is no Studio 5000 conversion, no tag-export dance, and no opportunity to introduce a navigation bug during a rushed cutover. For a validated or safety-related sequence whose paper trail is already closed, that repeatability is the selling point.

Diagnostics you can see from the aisle

Two LEDs on the bezel — green for network health, red for fault — turn first-line support into a glance instead of a laptop session. When the DeviceNet trunk loses a terminator or the scanner goes offline, the Allen-Bradley 2711-K3A10L1​ stops updating and the red indicator tells the story before the operator calls it in. That visibility, plus the optional local printer port for alarm logs, is why the unit keeps showing up on machines where nobody wants to remote-desktop into the cell just to answer “what tripped?”