SIMATIC HMI KP1200 Comfort 12-inch Key Panel, PROFINET and MPI/PROFIBUS DP (6AV2124-1MC01-0AX0) CAN Electric — Industrial Automation Parts Supplier

A 12-inch read-out with a key matrix that doubles as controller I/O

Some stations are better run by buttons than by a screen. When operators wear gloves, work a panel that gets wet or oily, or simply hit the same few controls every cycle, a membrane keypad with thirty-four lit keys is the more dependable interface. The KP1200 carries a 12.1-inch message display for text, status and alarms, and leaves the actuation to keys whose LEDs double as indicators. Where a touch front would demand a bare finger and an intact surface, this panel keeps working through the conditions a real floor produces — and the F-keys can be wired as DP direct keys and LEDs, so the controller sees a press as an input and a lamp as an output without HMI scripting.

Who keeps buying a 12-inch key panel

The order number still draws three buyers: replacing a failed unit whose cutout, project and TIA device already match, so the machine restarts without mechanical rework; holding a spare for a plant that runs several, because a stopped line costs more than a panel on a shelf; and shipping a like-for-like unit with an existing machine order. The 12-inch size carries hazardous-area and marine approvals, so it fits cells and vessels where a plain panel would not be accepted, and it gives a wider screen than the 9-inch key panel for alarm banners and faceplates.

For a new project the straight answer is the MTP1200 below; for the touch version of the same 12-inch size, the TP1200 Comfort is the sibling with a glass front. The KP1200 is the choice when you deliberately keep the screen as a read-out and let the keys do the work.

Data per the Siemens product documentation and Industry Mall entry. The cutout, front dimensions and depth are from the mounting instructions — cut the enclosure only after the current data sheet is checked, because plate thickness and flatness decide whether the front seal actually seals.

An indicator, an actuator, and a controller peripheral in one component

A lit function key shows machine state and accepts a press in the same place. Operators learn the position of the thirty-four keys by feel, so a glance-and-press works in low light or behind a guard, and a key that clicks is a confirmed action in a way a target on glass is not. Better still, the F-keys can be declared as DP direct keys and DP direct LEDs, so a press appears at the PLC as an input bit and a lamp as an output bit — no HMI tag, no script, and a shorter, more auditable path for acknowledge and emergency functions.

Where a key panel is the compliant choice

In a Zone 2/22 hazardous area or on a classed vessel, the approvals on the nameplate decide whether a panel may be installed at all. The KP1200 carries ATEX/IECEx, Division 2 and marine type approvals, so the keypad is not just a preference but a specification requirement — and a touch-only successor would have to be checked against the same certificate before it could take the panel’s place.

Built for the conditions that defeat a touch front

There is no glass to crack, no surface that smears or shatters, and nothing that floods when a hose passes too close from the front face. The trade is density: a key panel does not show a full schematic or a video, and at 5.660 kg and 20 W it asks more behind the cutout than the 4-inch model — but it fits doors, pendant arms and panels where a 15-inch device would never go, while carrying the hazardous-area and marine ratings the smaller key panels also hold.

The two are different device types in the same 12-inch Comfort family, not a shared housing — the KP1200 is the larger of the two, and a TP1200 archive will not download unchanged onto a KP1200. Choose the key-only device when the keys do the work; choose the TP1200 when operators also tap through screens.

Same-model swap: keep the opening, restore the project

Four things decide whether the machine restarts on the same shift: cutout, depth behind the door, 24 V supply, and the project. With a known-good project on an SD card, a replacement needs no laptop at the machine — insert the card and load. Without one, an engineering seat has to open, recompile and download, so put that resource next to the electrician.

Moving to the MTP1200: a same-size, keyless successor

Unlike the 4-inch Comfort, the 12-inch size has a same-size Unified successor: the 6AV2128-3MB06-0AX1, the MTP1200 Unified Comfort — a capacitive, multi-touch panel at 1280 × 800 with WinCC Unified Comfort engineering. Because it has no keys, a station that depended on the thirty-four buttons has to regain them another way: Siemens provides the KP8 (eight-button) and KP32 (thirty-two-button) key modules on PROFINET, which restore a key surface beside the new touch panel.

What else changes when you cross that line

The platform moves from Windows CE 6.0 to the Linux-based Unified system, the engineering tool moves from WinCC Comfort V11 to WinCC Unified Comfort, and the device type in the project changes. Screens do not port one to one, so the upgrade is a project with a schedule, not a download. Note also that the MTP1200 keeps the 12-inch class but is a different cutout from the KP1200, so the opening has to be rechecked. Treat the keypad decision as part of the migration plan, not an afterthought.

Successor assignment and the KP8/KP32 option follow the Siemens status-change notice for the 12-inch Comfort devices. Confirm the exact successor number, the cutout difference and the key-module fit against the current Siemens catalogue before ordering — the panel and the key module are separate order numbers.

The panel couples to SIMATIC S7-1200, S7-1500 and S7-300/400 over PROFINET or MPI/PROFIBUS DP, with Modbus TCP/IP and EtherNet/IP for third-party controllers. The two PROFINET ports form an integrated switch, so a line or ring topology connects without an external switch. The 9-inch KP900 Comfort is the smaller key sibling, the TP1200 Comfort is the touch end of this 12-inch size, the 15-inch KP1500 Comfort is the next key panel up, and the TP1500 Comfort PRO range is the one whose rear is also sealed for washdown or outdoor cells.

How to order

• Email sales@can-electric.com with the order number, quantity, delivery country, and whether you are replacing a unit or stocking spares.
• State the condition you need — new, new-surplus or refurbished is written on the quote, not implied. For a running machine, send the hardware details from the old nameplate.
• The type is in phase-out, so availability comes from channel stock and is confirmed per order; prices are USD and ship from Hong Kong by DHL.